fix(bedrock): drop toolSpec.strict for four more Claude Converse ids

Bedrock Converse routes Haiku 4.5, Sonnet 4.5/4.6 and Opus 4.6 through the
same Anthropic-compatible validator as Opus 4.7/4.8 and Sonnet 4/5, but their
cost-map entries were never flagged, so `toolSpec.strict` is still forwarded
for them.

Forwarding `strict: true` makes the model compile the tool schema into a
constrained-decoding grammar, and that grammar rejects ordinary JSON Schema
keywords. A tool carrying `maxItems` on an array property then fails the whole
request:

    BedrockException - {"message":"The model returned the following errors:
    tools.1.custom: For 'array' type, property 'maxItems' is not supported"}

Neither field fails on its own, only the pair, which is why this surfaced as
a sudden breakage for tool-calling clients (Cline forks, Codex, MCP toolsets)
after upgrading across v1.90.0, where forwarding `toolSpec.strict` to Converse
was introduced. Reproduced against Bedrock for Haiku 4.5, Sonnet 4.6 and
Opus 4.6; Sonnet 4.5 is flagged as the remaining member of the same cohort.

Sets `bedrock_converse_supports_strict_tools: false` on all 30 Bedrock entries
for those four ids (bare, every region prefix, and the us-gov keys), matching
how Opus 4.7/4.8, Sonnet 4 and Sonnet 5 are already flagged, so the fix is data
rather than another hardcoded model pattern.

Two tests asserted the pre-fix behaviour and are updated: the strict-tools
regression suite listed Sonnet 4.5/4.6 and Opus 4.6 as models that keep the
field, and test_bedrock_tools_pt_strict_parameter used Sonnet 4.5 as its
example of a Claude id that forwards it, which is now Opus 4.5.

Fixes #34388

litellm/model_prices_and_context_window_backup.json

@@ -756,6 +756,7 @@
         "prompt_cache_min_tokens": 2048
     },
     "anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.25e-06,
         "cache_creation_input_token_cost_above_1hr": 2e-06,
         "cache_read_input_token_cost": 1e-07,
@@ -784,6 +785,7 @@
         "output_cost_per_token_batches": 2.5e-06
     },
     "anthropic.claude-haiku-4-5@20251001": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.25e-06,
         "cache_creation_input_token_cost_above_1hr": 2e-06,
         "cache_read_input_token_cost": 1e-07,
@@ -1038,6 +1040,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.25e-06,
@@ -1073,6 +1076,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "global.anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.25e-06,
@@ -1108,6 +1112,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "us.anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.875e-06,
@@ -1143,6 +1148,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "eu.anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.875e-06,
@@ -1178,6 +1184,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "au.anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.875e-06,
@@ -2257,6 +2264,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 3.75e-06,
@@ -2291,6 +2299,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "global.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 3.75e-06,
@@ -2325,6 +2334,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "us.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 4.125e-06,
@@ -2359,6 +2369,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "eu.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 4.125e-06,
@@ -2393,6 +2404,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "au.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 4.125e-06,
@@ -2427,6 +2439,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "jp.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 4.125e-06,
@@ -2493,6 +2506,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 3.75e-06,
         "cache_creation_input_token_cost_above_1hr": 6e-06,
         "cache_read_input_token_cost": 3e-07,
@@ -2761,6 +2775,7 @@
         "cache_creation_input_token_cost": 3.125e-07
     },
     "apac.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_read_input_token_cost": 1.1e-07,
         "input_cost_per_token": 1.1e-06,
@@ -2849,6 +2864,7 @@
         "output_cost_per_second": 0.0
     },
     "au.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.125e-06,
         "cache_creation_input_token_cost_above_1hr": 6.6e-06,
         "cache_read_input_token_cost": 3.3e-07,
@@ -11652,6 +11668,7 @@
         "cache_creation_input_token_cost": 3.75e-07
     },
     "bedrock/us-gov-east-1/anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.5e-06,
         "cache_creation_input_token_cost_above_1hr": 7.2e-06,
         "cache_read_input_token_cost": 3.6e-07,
@@ -11836,6 +11853,7 @@
         "cache_creation_input_token_cost": 3.75e-07
     },
     "bedrock/us-gov-west-1/anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.5e-06,
         "cache_creation_input_token_cost_above_1hr": 7.2e-06,
         "cache_read_input_token_cost": 3.6e-07,
@@ -17632,6 +17650,7 @@
         "prompt_cache_min_tokens": 2048
     },
     "eu.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_creation_input_token_cost_above_1hr": 2.2e-06,
         "cache_read_input_token_cost": 1.1e-07,
@@ -17850,6 +17869,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "eu.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.125e-06,
         "cache_creation_input_token_cost_above_1hr": 6.6e-06,
         "cache_read_input_token_cost": 3.3e-07,
@@ -24771,6 +24791,7 @@
         "mode": "search"
     },
     "global.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 3.75e-06,
         "cache_creation_input_token_cost_above_1hr": 6e-06,
         "cache_read_input_token_cost": 3e-07,
@@ -24840,6 +24861,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "global.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.25e-06,
         "cache_creation_input_token_cost_above_1hr": 2e-06,
         "cache_read_input_token_cost": 1e-07,
@@ -29767,6 +29789,7 @@
         "output_cost_per_token": 1.8e-08
     },
     "jp.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.125e-06,
         "cache_creation_input_token_cost_above_1hr": 6.6e-06,
         "cache_read_input_token_cost": 3.3e-07,
@@ -29804,6 +29827,7 @@
         "output_cost_per_token_batches": 8.25e-06
     },
     "jp.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_creation_input_token_cost_above_1hr": 2.2e-06,
         "cache_read_input_token_cost": 1.1e-07,
@@ -39504,6 +39528,7 @@
         "prompt_cache_min_tokens": 2048
     },
     "us.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_creation_input_token_cost_above_1hr": 2.2e-06,
         "cache_read_input_token_cost": 1.1e-07,
@@ -39663,6 +39688,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "us.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.125e-06,
         "cache_creation_input_token_cost_above_1hr": 6.6e-06,
         "cache_read_input_token_cost": 3.3e-07,
@@ -39700,6 +39726,7 @@
         "output_cost_per_token_batches": 8.25e-06
     },
     "us-gov.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.5e-06,
         "cache_creation_input_token_cost_above_1hr": 7.2e-06,
         "cache_read_input_token_cost": 3.6e-07,
@@ -39730,6 +39757,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "au.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_creation_input_token_cost_above_1hr": 2.2e-06,
         "cache_read_input_token_cost": 1.1e-07,
@@ -50840,6 +50868,7 @@
         "source": "https://aws.amazon.com/bedrock/pricing/"
     },
     "bedrock/us-gov-east-1/anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.5e-06,
         "cache_creation_input_token_cost_above_1hr": 2.4e-06,
         "cache_read_input_token_cost": 1.2e-07,
@@ -50866,6 +50895,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "bedrock/us-gov-west-1/anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.5e-06,
         "cache_creation_input_token_cost_above_1hr": 2.4e-06,
         "cache_read_input_token_cost": 1.2e-07,

model_prices_and_context_window.json

@@ -756,6 +756,7 @@
         "prompt_cache_min_tokens": 2048
     },
     "anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.25e-06,
         "cache_creation_input_token_cost_above_1hr": 2e-06,
         "cache_read_input_token_cost": 1e-07,
@@ -784,6 +785,7 @@
         "output_cost_per_token_batches": 2.5e-06
     },
     "anthropic.claude-haiku-4-5@20251001": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.25e-06,
         "cache_creation_input_token_cost_above_1hr": 2e-06,
         "cache_read_input_token_cost": 1e-07,
@@ -1038,6 +1040,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.25e-06,
@@ -1073,6 +1076,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "global.anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.25e-06,
@@ -1108,6 +1112,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "us.anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.875e-06,
@@ -1143,6 +1148,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "eu.anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.875e-06,
@@ -1178,6 +1184,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "au.anthropic.claude-opus-4-6-v1": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 6.875e-06,
@@ -2257,6 +2264,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 3.75e-06,
@@ -2291,6 +2299,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "global.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 3.75e-06,
@@ -2325,6 +2334,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "us.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 4.125e-06,
@@ -2359,6 +2369,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "eu.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 4.125e-06,
@@ -2393,6 +2404,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "au.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 4.125e-06,
@@ -2427,6 +2439,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "jp.anthropic.claude-sonnet-4-6": {
+        "bedrock_converse_supports_strict_tools": false,
         "supports_adaptive_thinking": true,
         "supports_legacy_thinking": true,
         "cache_creation_input_token_cost": 4.125e-06,
@@ -2493,6 +2506,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 3.75e-06,
         "cache_creation_input_token_cost_above_1hr": 6e-06,
         "cache_read_input_token_cost": 3e-07,
@@ -2761,6 +2775,7 @@
         "cache_creation_input_token_cost": 3.125e-07
     },
     "apac.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_read_input_token_cost": 1.1e-07,
         "input_cost_per_token": 1.1e-06,
@@ -2849,6 +2864,7 @@
         "output_cost_per_second": 0.0
     },
     "au.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.125e-06,
         "cache_creation_input_token_cost_above_1hr": 6.6e-06,
         "cache_read_input_token_cost": 3.3e-07,
@@ -11652,6 +11668,7 @@
         "cache_creation_input_token_cost": 3.75e-07
     },
     "bedrock/us-gov-east-1/anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.5e-06,
         "cache_creation_input_token_cost_above_1hr": 7.2e-06,
         "cache_read_input_token_cost": 3.6e-07,
@@ -11836,6 +11853,7 @@
         "cache_creation_input_token_cost": 3.75e-07
     },
     "bedrock/us-gov-west-1/anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.5e-06,
         "cache_creation_input_token_cost_above_1hr": 7.2e-06,
         "cache_read_input_token_cost": 3.6e-07,
@@ -17632,6 +17650,7 @@
         "prompt_cache_min_tokens": 2048
     },
     "eu.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_creation_input_token_cost_above_1hr": 2.2e-06,
         "cache_read_input_token_cost": 1.1e-07,
@@ -17850,6 +17869,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "eu.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.125e-06,
         "cache_creation_input_token_cost_above_1hr": 6.6e-06,
         "cache_read_input_token_cost": 3.3e-07,
@@ -24771,6 +24791,7 @@
         "mode": "search"
     },
     "global.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 3.75e-06,
         "cache_creation_input_token_cost_above_1hr": 6e-06,
         "cache_read_input_token_cost": 3e-07,
@@ -24840,6 +24861,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "global.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.25e-06,
         "cache_creation_input_token_cost_above_1hr": 2e-06,
         "cache_read_input_token_cost": 1e-07,
@@ -29767,6 +29789,7 @@
         "output_cost_per_token": 1.8e-08
     },
     "jp.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.125e-06,
         "cache_creation_input_token_cost_above_1hr": 6.6e-06,
         "cache_read_input_token_cost": 3.3e-07,
@@ -29804,6 +29827,7 @@
         "output_cost_per_token_batches": 8.25e-06
     },
     "jp.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_creation_input_token_cost_above_1hr": 2.2e-06,
         "cache_read_input_token_cost": 1.1e-07,
@@ -39504,6 +39528,7 @@
         "prompt_cache_min_tokens": 2048
     },
     "us.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_creation_input_token_cost_above_1hr": 2.2e-06,
         "cache_read_input_token_cost": 1.1e-07,
@@ -39663,6 +39688,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "us.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.125e-06,
         "cache_creation_input_token_cost_above_1hr": 6.6e-06,
         "cache_read_input_token_cost": 3.3e-07,
@@ -39700,6 +39726,7 @@
         "output_cost_per_token_batches": 8.25e-06
     },
     "us-gov.anthropic.claude-sonnet-4-5-20250929-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 4.5e-06,
         "cache_creation_input_token_cost_above_1hr": 7.2e-06,
         "cache_read_input_token_cost": 3.6e-07,
@@ -39730,6 +39757,7 @@
         "prompt_cache_min_tokens": 1024
     },
     "au.anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.375e-06,
         "cache_creation_input_token_cost_above_1hr": 2.2e-06,
         "cache_read_input_token_cost": 1.1e-07,
@@ -50840,6 +50868,7 @@
         "source": "https://aws.amazon.com/bedrock/pricing/"
     },
     "bedrock/us-gov-east-1/anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.5e-06,
         "cache_creation_input_token_cost_above_1hr": 2.4e-06,
         "cache_read_input_token_cost": 1.2e-07,
@@ -50866,6 +50895,7 @@
         "prompt_cache_min_tokens": 4096
     },
     "bedrock/us-gov-west-1/anthropic.claude-haiku-4-5-20251001-v1:0": {
+        "bedrock_converse_supports_strict_tools": false,
         "cache_creation_input_token_cost": 1.5e-06,
         "cache_creation_input_token_cost_above_1hr": 2.4e-06,
         "cache_read_input_token_cost": 1.2e-07,

tests/test_litellm/litellm_core_utils/prompt_templates/test_bedrock_converse_strict_tools_opus_47_48.py

@@ -5,6 +5,13 @@ Anthropic-compatible validator that rejects ``toolSpec.strict`` even though
 Anthropic's native API accepts ``strict`` as a top-level tool field. See
 BerriAI/litellm#31582.
 
+The same validator covers Haiku 4.5, Sonnet 4.5/4.6 and Opus 4.6, which were left
+unflagged. Forwarding ``strict: true`` makes it compile the tool schema into a
+constrained-decoding grammar, and that grammar rejects ordinary JSON Schema keywords:
+a tool carrying ``maxItems`` on an array property comes back as ``For 'array' type,
+property 'maxItems' is not supported``. Neither field fails on its own, only the pair.
+See BerriAI/litellm#34388.
+
 That per-model gate only covers models whose cost-map entry carries the flag, so a
 ``strict: false`` that litellm itself synthesized still broke unflagged models. Since
 ``strict: false`` is the Chat Completions default, it is now dropped for every model
@@ -68,12 +75,23 @@ _NON_STRICT_TOOL = [
         "bedrock/us.anthropic.claude-sonnet-5",
         "bedrock/eu.anthropic.claude-sonnet-5",
         "bedrock/jp.anthropic.claude-sonnet-5",
+        # Haiku 4.5, Sonnet 4.5/4.6 and Opus 4.6 reject it as well, see #34388
+        "anthropic.claude-haiku-4-5-20251001-v1:0",
+        "bedrock/us.anthropic.claude-haiku-4-5-20251001-v1:0",
+        "bedrock/eu.anthropic.claude-haiku-4-5-20251001-v1:0",
+        "anthropic.claude-sonnet-4-5-20250929-v1:0",
+        "bedrock/us.anthropic.claude-sonnet-4-5-20250929-v1:0",
+        "anthropic.claude-sonnet-4-6",
+        "bedrock/us.anthropic.claude-sonnet-4-6",
+        "bedrock/eu.anthropic.claude-sonnet-4-6",
+        "anthropic.claude-opus-4-6-v1",
+        "bedrock/eu.anthropic.claude-opus-4-6-v1",
     ],
 )
 def test_bedrock_tools_pt_strict_dropped_for_strict_unsupported_models(
     model_id: str,
 ) -> None:
-    """Opus 4.7/4.8, Sonnet 4 and Sonnet 5 reject toolSpec.strict and additionalProperties."""
+    """These Claude ids reject toolSpec.strict and additionalProperties on Converse."""
     result = _bedrock_tools_pt(_STRICT_TOOL, model=model_id)
     tool_spec = result[0]["toolSpec"]
     assert (
@@ -87,14 +105,12 @@ def test_bedrock_tools_pt_strict_dropped_for_strict_unsupported_models(
 @pytest.mark.parametrize(
     "model_id",
     [
-        "anthropic.claude-sonnet-4-5-20250929-v1:0",
-        "bedrock/us.anthropic.claude-sonnet-4-6",
-        "bedrock/us.anthropic.claude-opus-4-6",
         "bedrock/us.anthropic.claude-opus-4-5",
+        "bedrock/us.anthropic.claude-3-5-sonnet-20241022-v2:0",
     ],
 )
 def test_bedrock_tools_pt_strict_kept_for_other_anthropic(model_id: str) -> None:
-    """Sonnet 4.5/4.6 and Opus <=4.6 accept toolSpec.strict — keep forwarding it."""
+    """Claude ids with no flag in the cost map keep forwarding toolSpec.strict."""
     result = _bedrock_tools_pt(_STRICT_TOOL, model=model_id)
     assert (
         result[0]["toolSpec"]["strict"] is True
@@ -177,10 +193,16 @@ def test_bedrock_converse_supports_strict_tools_helper() -> None:
         bedrock_converse_supports_strict_tools(
             "anthropic.claude-sonnet-4-5-20250929-v1:0"
         )
-        is True
+        is False
     )
     assert (
-        bedrock_converse_supports_strict_tools("bedrock/us.anthropic.claude-opus-4-6")
+        bedrock_converse_supports_strict_tools(
+            "bedrock/eu.anthropic.claude-opus-4-6-v1"
+        )
+        is False
+    )
+    assert (
+        bedrock_converse_supports_strict_tools("bedrock/us.anthropic.claude-opus-4-5")
         is True
     )
     assert bedrock_converse_supports_strict_tools("us.amazon.nova-micro-v1:0") is False
@@ -204,8 +226,14 @@ def test_bedrock_converse_supports_strict_tools_helper() -> None:
         is False
     )
     assert (
-        bedrock_converse_supports_strict_tools("bedrock/us.anthropic.claude-haiku-4-5-20251001-v1:0")
-        is True
+        bedrock_converse_supports_strict_tools(
+            "bedrock/us.anthropic.claude-haiku-4-5-20251001-v1:0"
+        )
+        is False
+    )
+    assert (
+        bedrock_converse_supports_strict_tools("bedrock/eu.anthropic.claude-sonnet-4-6")
+        is False
     )
 
 
@@ -227,6 +255,20 @@ def test_bedrock_converse_supports_strict_tools_helper() -> None:
         "eu.anthropic.claude-sonnet-5",
         "au.anthropic.claude-sonnet-5",
         "jp.anthropic.claude-sonnet-5",
+        "anthropic.claude-haiku-4-5-20251001-v1:0",
+        "us.anthropic.claude-haiku-4-5-20251001-v1:0",
+        "eu.anthropic.claude-haiku-4-5-20251001-v1:0",
+        "apac.anthropic.claude-haiku-4-5-20251001-v1:0",
+        "bedrock/us-gov-east-1/anthropic.claude-haiku-4-5-20251001-v1:0",
+        "anthropic.claude-sonnet-4-5-20250929-v1:0",
+        "us.anthropic.claude-sonnet-4-5-20250929-v1:0",
+        "us-gov.anthropic.claude-sonnet-4-5-20250929-v1:0",
+        "anthropic.claude-sonnet-4-6",
+        "us.anthropic.claude-sonnet-4-6",
+        "eu.anthropic.claude-sonnet-4-6",
+        "anthropic.claude-opus-4-6-v1",
+        "us.anthropic.claude-opus-4-6-v1",
+        "eu.anthropic.claude-opus-4-6-v1",
     ],
 )
 def test_strict_tools_flag_set_in_model_cost_map(cost_map_key: str) -> None:

tests/test_litellm/litellm_core_utils/prompt_templates/test_litellm_core_utils_prompt_templates_factory.py

@@ -982,6 +982,10 @@ def test_bedrock_tools_pt_strict_parameter():
     Bedrock requires alongside strict); without forwarding it the model ignores the
     enum constraint the caller asked for. Every other Bedrock family (Nova, Llama,
     GPT-OSS) rejects the strict field, so it must only be forwarded for Claude.
+
+    Uses Opus 4.5, since the Claude ids whose cost-map entry sets
+    ``bedrock_converse_supports_strict_tools: false`` never receive the field. See
+    test_bedrock_converse_strict_tools_opus_47_48.py for that gate.
     """
     tools_with_strict = [
         {
@@ -1000,7 +1004,7 @@ def test_bedrock_tools_pt_strict_parameter():
         }
     ]
     result = _bedrock_tools_pt(
-        tools_with_strict, model="anthropic.claude-sonnet-4-5-20250929-v1:0"
+        tools_with_strict, model="anthropic.claude-opus-4-5-20251101-v1:0"
     )
     assert result[0]["toolSpec"]["strict"] is True
     assert result[0]["toolSpec"]["inputSchema"]["json"]["additionalProperties"] is False
@@ -1024,7 +1028,7 @@ def test_bedrock_tools_pt_strict_parameter():
         }
     ]
     result = _bedrock_tools_pt(
-        tools_without_strict, model="anthropic.claude-sonnet-4-5-20250929-v1:0"
+        tools_without_strict, model="anthropic.claude-opus-4-5-20251101-v1:0"
     )
     assert "strict" not in result[0]["toolSpec"]
     assert "additionalProperties" not in result[0]["toolSpec"]["inputSchema"]["json"]