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Tools with no parameters (like EnterPlanMode from Anthropic Agents SDK)
send schemas with only $schema and no type field. Gemini rejects these
with "functionDeclaration parameters schema should be of type OBJECT".
Adds type: object when schema has no type and no anyOf/oneOf/allOf.
Extract and preserve provider-specific headers (llm_provider-*) when
handling error responses from LLM providers. This ensures that useful
debugging information from providers is available even when requests
fail with BadRequestError or similar exceptions.
Gemini API rejects JSON schemas with $defs/$ref references anywhere in
the conversation, including in function_response content. This causes
errors when tools return JSON containing schemas (e.g., toolbelt_inspect_tool
returning tool definitions).
The fix:
1. Apply unpack_defs() to all JSON tool responses before sending to Gemini
2. Recursively remove $defs sections after inlining references
3. Replace any remaining $ref (circular refs, external URLs) with placeholders
Edge cases handled:
- Circular $ref (self-referential types like TreeNode.left -> TreeNode)
- External $ref (URL-based like https://...)
- Deeply nested $ref in anyOf/oneOf/allOf
This ensures function_response content is clean before being sent to the
Gemini API.
Related issues:
- https://github.com/google-gemini/gemini-cli/issues/13326
- FastMCP #1372, #1426
OpenAI's 400k context window is split between input and output:
- GPT-5/5.1/5.2 models: 272k input + 128k output = 400k context
- GPT-5-pro models: 128k input + 272k output = 400k context
Reference: https://openai.com/index/introducing-gpt-5-for-developers/
"In the API, all GPT-5 models can accept a maximum of 272,000 input
tokens and emit a maximum of 128,000 reasoning & output tokens"
Fixes incorrect 400k max_input_tokens values across 32 models.
- Add cerebras/zai-glm-4.7 with same specs as 4.6 (128K context, $2.25/M input, $2.75/M output)
- Mark cerebras/zai-glm-4.6 with deprecation_date: 2026-01-20
- Both models support function calling, reasoning, and tool choice
