Unsupported parameter: 'max_tokens' is not supported with this model. Use 'max_completion_tokens' instead. #37964

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1. github-actions

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   jlongster

   on Jul 20, 2026
2. github-actions commented on Jul 20, 2026

   

   github-actionsBot

   on Jul 20, 2026 – with GitHub Actions

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   This issue doesn't fully meet our contributing guidelines.

   What needs to be fixed:

   • No issue template was used (Bug Report, Feature Request, or Question)
   • No description or context provided — the issue body is just the error message title repeated
   • No reproduction steps, environment details, or system information included

   Please edit this issue to address the above within 2 hours, or it will be automatically closed.

   ---

   This issue might be a duplicate of existing issues. Please check:

   • Azure GPT-5 model: "max_tokens" parameter not supported, need "max_completion_tokens" instead #22623: Azure GPT-5 model: "max_tokens" parameter not supported, need "max_completion_tokens" instead
   • openai-compatible adapter sends max_tokens to GPT-5/o-series reasoning models that require max_completion_tokens #25096: openai-compatible adapter sends max_tokens to GPT-5/o-series reasoning models that require max_completion_tokens
   • cloudflare-ai-gateway: Azure GPT-5.x models fail (max_tokens vs max_completion_tokens); per-model compat not honored #32776: cloudflare-ai-gateway: Azure GPT-5.x models fail (max_tokens vs max_completion_tokens); per-model compat not honored

   If you believe this was flagged incorrectly, please let a maintainer know.
3. github-actions

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   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

   on Jul 20, 2026
4. github-actions commented on Jul 20, 2026

   

   github-actionsBot

   on Jul 20, 2026 – with GitHub Actions

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   This issue has been automatically closed because it was not updated to meet our contributing guidelines within the 2-hour window.

   Feel free to open a new issue that follows our issue templates.
5. github-actions

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   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

   on Jul 20, 2026
6. github-actions

   closed this as not plannedon Jul 20, 2026