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fix(anthropic): remove unsupported structured-outputs beta header for Vertex AI #462

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Merged
merged 1 commit into from
Dec 2, 2025
Merged

fix(anthropic): remove unsupported structured-outputs beta header for Vertex AI #462

merged 1 commit into from
Dec 2, 2025

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@yamitzky
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@yamitzky yamitzky commented Dec 2, 2025 •
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Summary

  • Remove structured-outputs-2025-11-13 beta header for Vertex AI Anthropic integration
  • This header is not supported by Vertex AI and causes invalid_request_error responses
  • Keep web-search-2025-03-05 header which is supported
  Response Body: {
    "httpStatus": 400,
    "httpStatusText": "Bad Request",
    "responseBody": "{\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"Unexpected value(s) `structured-outputs-2025-11-13` for the `anthropic-beta` header. Please consult our documentation at docs.anthropic.com or try again without the header.\"},\"request_id\":\"req_vrtx_XXXXXXXXXX\"}",
    "metrics": {
      "startTime": 1764679274337,
      "retryCount": 0
    }
  }

Related to #457

@yamitzky
fix(anthropic): remove unsupported structured-outputs beta header for…
b74510c 
… Vertex AI

Vertex AI's Anthropic integration does not support the structured-outputs-2025-11-13
beta header, causing invalid_request_error responses. Remove this header while keeping
web-search-2025-03-05 which is supported.
@dosco dosco merged commit 8420adb into ax-llm:main Dec 2, 2025
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2 participants

@yamitzky @dosco