Bug: Anthropic models error Input_schema does not support oneOf, allOf, or anyOf at the top level #37916

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1. LuizGustavoWT

   changed the title [-]Anthropic models error: Input_schema does not support oneOf, allOf, or anyOf at the top level[/-] [+]Bug: Anthropic models error Input_schema does not support oneOf, allOf, or anyOf at the top level[/+] on Jul 20, 2026
2. github-actions

   assigned

   rekram1-node

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

   

   github-actionsBot

   on Jul 20, 2026 – with GitHub Actions

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

   • Anthropic API rejects MCP tools with anyOf in input_schema #35516: Same error message and root cause — Anthropic API rejects MCP tool schemas containing oneOf/allOf/anyOf at the top level; the sanitization from PR fix(opencode): sanitize OpenAI MCP tool schemas #32489 only covers OpenAI/Azure adapters and not the Anthropic path.

   👍React with 👍1Reacted by Luiz Gustavo
4. github-actions commented on Sep 19, 2026

   

   github-actionsBot

   on Sep 19, 2026 – with GitHub Actions

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   To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.
5. github-actions

   closed this as not plannedon Sep 19, 2026