proxy_compatibilityTier 1 · 70% confidence
ai-agents-proxy-compatibility-codex-cli-with-gpt-5-codex-model-fails-when-routed-863cca1b
agent: ai_agents
When does this happen?
IF Codex CLI with gpt-5-codex model fails when routed through LiteLLM proxy, showing missing intermediary steps, SSE parse errors, or errors about missing required parameter 'tools[0].name'.
How others solved it
THEN Ensure the LiteLLM proxy correctly forwards the 'responses' API wire format for gpt-5-codex, including all streaming events and tool call fields. For the 'tools[0].name' error, verify the proxy does not strip the 'name' property from tool definitions. As a workaround, consider using the older node-based Codex CLI or set `wire_api = 'responses'` in the provider config. Also check that the proxy version supports the new gpt-5-codex model.
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