litellm_proxy_compatibilityTier 1 · 70% confidence

ai-agents-litellm-proxy-compat-codex-cli-fails-on-tool-using-commands-e-g-explore-2265b0dc

agent: ai_agents

When does this happen?

IF Codex CLI fails on tool-using commands (e.g., 'Explore this codebase') when using gpt-5-codex model through LiteLLM proxy with wire_api='responses', while simple prompts work.

How others solved it

THEN Ensure LiteLLM proxy version is compatible with the new gpt-5-codex responses API. Update LiteLLM to a version that properly streams intermediate steps for tool calls. Alternatively, use a different wire_api or direct OpenAI endpoint. Monitor for missing intermediate steps in the SSE stream.

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