Description

Anthropic has released code_execution_20260120, the latest version of their code execution tool, which is now the recommended version for programmatic tool calling.

The AI SDK currently only supports code_execution_20250825 via anthropic.tools.codeExecution_20250825(). The newer version does not require a beta header and is supported on Claude Opus 4.6, Sonnet 4.6, Sonnet 4.5, and Opus 4.5.

What's needed

1. A new anthropic.tools.codeExecution_20260120() factory (can reuse the 20250825 input/output schemas — they're the same)
2. A case "anthropic.code_execution_20260120" in prepareTools (I didn't need a beta header in testing, but it may still be required?? Maybe anthropic is on the verge of GA)
3. Tool name mapping entry: "anthropic.code_execution_20260120": "code_execution"
4. Zod response schemas updated to accept "code_execution_20260120" as a valid caller.type (currently only "code_execution_20250825" | "direct")
5. Runtime caller reconstruction in convertToAnthropicMessagesPrompt to handle the new caller type
6. TypeScript type declarations for the new factory

Workaround

We're using patch-package to add all of the above to @ai-sdk/anthropic@3.0.46. Happy to open a PR if helpful.

Related

• Support Anthropic Code Execution 2025-08-25 tool #9433 — original issue for code_execution_20250825 support
• https://platform.claude.com/docs/en/agents-and-tools/tool-use/programmatic-tool-calling — Anthropic docs

AI SDK Version

• ai: 6.0.71
• @ai-sdk/anthropic: 3.0.46

Code of Conduct

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