fix(openinfer): set catalog rates from vendor per-million prices

Zero rates skipped LiteLLM spend limits. Convert the vendor's $/1M token
prices to per-token catalog entries and add Qwen3.5-27B plus Gemma4-31B.

Co-authored-by: Cursor <cursoragent@cursor.com>

litellm/model_prices_and_context_window_backup.json

@@ -63842,8 +63842,8 @@
         "max_tokens": 8192,
         "max_input_tokens": 128000,
         "max_output_tokens": 8192,
-        "input_cost_per_token": 0.0,
-        "output_cost_per_token": 0.0,
+        "input_cost_per_token": 2e-08,
+        "output_cost_per_token": 2e-08,
         "litellm_provider": "openinfer",
         "mode": "chat",
         "supports_function_calling": true,
@@ -63853,8 +63853,30 @@
         "max_tokens": 8192,
         "max_input_tokens": 262144,
         "max_output_tokens": 8192,
-        "input_cost_per_token": 0.0,
-        "output_cost_per_token": 0.0,
+        "input_cost_per_token": 1.5e-07,
+        "output_cost_per_token": 1.8e-07,
+        "litellm_provider": "openinfer",
+        "mode": "chat",
+        "supports_function_calling": true,
+        "source": "https://api.openinfer.ai/v1/models"
+    },
+    "openinfer/@oi/Qwen3.5-27B": {
+        "max_tokens": 8192,
+        "max_input_tokens": 262144,
+        "max_output_tokens": 8192,
+        "input_cost_per_token": 7.2e-07,
+        "output_cost_per_token": 7.2e-07,
+        "litellm_provider": "openinfer",
+        "mode": "chat",
+        "supports_function_calling": true,
+        "source": "https://api.openinfer.ai/v1/models"
+    },
+    "openinfer/@oi/Gemma4-31B": {
+        "max_tokens": 8192,
+        "max_input_tokens": 262144,
+        "max_output_tokens": 8192,
+        "input_cost_per_token": 5.2e-07,
+        "output_cost_per_token": 7.5e-07,
         "litellm_provider": "openinfer",
         "mode": "chat",
         "supports_function_calling": true,

model_prices_and_context_window.json

@@ -63842,8 +63842,8 @@
         "max_tokens": 8192,
         "max_input_tokens": 128000,
         "max_output_tokens": 8192,
-        "input_cost_per_token": 0.0,
-        "output_cost_per_token": 0.0,
+        "input_cost_per_token": 2e-08,
+        "output_cost_per_token": 2e-08,
         "litellm_provider": "openinfer",
         "mode": "chat",
         "supports_function_calling": true,
@@ -63853,8 +63853,30 @@
         "max_tokens": 8192,
         "max_input_tokens": 262144,
         "max_output_tokens": 8192,
-        "input_cost_per_token": 0.0,
-        "output_cost_per_token": 0.0,
+        "input_cost_per_token": 1.5e-07,
+        "output_cost_per_token": 1.8e-07,
+        "litellm_provider": "openinfer",
+        "mode": "chat",
+        "supports_function_calling": true,
+        "source": "https://api.openinfer.ai/v1/models"
+    },
+    "openinfer/@oi/Qwen3.5-27B": {
+        "max_tokens": 8192,
+        "max_input_tokens": 262144,
+        "max_output_tokens": 8192,
+        "input_cost_per_token": 7.2e-07,
+        "output_cost_per_token": 7.2e-07,
+        "litellm_provider": "openinfer",
+        "mode": "chat",
+        "supports_function_calling": true,
+        "source": "https://api.openinfer.ai/v1/models"
+    },
+    "openinfer/@oi/Gemma4-31B": {
+        "max_tokens": 8192,
+        "max_input_tokens": 262144,
+        "max_output_tokens": 8192,
+        "input_cost_per_token": 5.2e-07,
+        "output_cost_per_token": 7.5e-07,
         "litellm_provider": "openinfer",
         "mode": "chat",
         "supports_function_calling": true,

tests/test_litellm/llms/openai_like/test_openinfer_provider.py

@@ -2,8 +2,19 @@
 Tests for the OpenInfer LLM provider configuration and integration.
 """
 
+import json
+from pathlib import Path
+
+import pytest
+
 import litellm
 
+_REPO_ROOT = Path(__file__).resolve().parents[4]
+_PRICE_FILES = (
+    _REPO_ROOT / "model_prices_and_context_window.json",
+    _REPO_ROOT / "litellm" / "model_prices_and_context_window_backup.json",
+)
+
 
 class TestOpenInferProviderConfig:
     def test_openinfer_in_provider_list(self):
@@ -89,3 +100,23 @@ class TestOpenInferProviderConfig:
             )
             == "https://api.openinfer.ai/v1/chat/completions"
         )
+
+    @pytest.mark.parametrize(
+        ("model", "input_cost_per_token", "output_cost_per_token"),
+        (
+            ("openinfer/@oi/Llama-3.2-1B-Instruct", 2e-08, 2e-08),
+            ("openinfer/@oi/Qwen3.5-9B", 1.5e-07, 1.8e-07),
+            ("openinfer/@oi/Qwen3.5-27B", 7.2e-07, 7.2e-07),
+            ("openinfer/@oi/Gemma4-31B", 5.2e-07, 7.5e-07),
+        ),
+    )
+    def test_catalog_token_rates_match_vendor_per_million_prices(
+        self, model: str, input_cost_per_token: float, output_cost_per_token: float
+    ):
+        for path in _PRICE_FILES:
+            catalog = json.loads(path.read_text())
+            row = catalog[model]
+            assert row["input_cost_per_token"] == input_cost_per_token
+            assert row["output_cost_per_token"] == output_cost_per_token
+            assert row["input_cost_per_token"] > 0
+            assert row["output_cost_per_token"] > 0