OpenAI Responses API

o3 may not maintain sufficient context with a single request alone. Therefore, when using Function calling, include either previous_response_id or all "reasoning items" in subsequent requests to prevent performance degradation. (This applies to other situations as well, but is especially critical after function calls)

{
  "model": "o3-2025-04-03",
  "input": "Continue with the next function call.",
  "previous_response_id": "resp_abc123"
}