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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.251 Feeds RSS JSON llms.txt
Reading a new release v2.1.251 Analysing changes · 2/5 Deeper second pass · 0/5 agents 427 findings $12.75 so far

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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code-execution-tool

agents-and-tools/tool-use/code-execution-tool

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Nearest release: v2.1.237, published an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

agents-and-tools/tool-use/code-execution-tool Changed · +1 / -1 lines

from line 278
 To analyze your own data files (such as CSV, Excel, or images), upload them through the Files API and reference them in your request:
 
 <Note>
-  Using the Files API with code execution requires the Files API beta header: `"anthropic-beta": "files-api-2025-04-14"`
+  This workflow doesn't require a beta header: uploading and downloading files through the Files API and referencing them in `container_upload` blocks are all generally available. The examples on this page send `anthropic-beta: files-api-2025-04-14`, which the API accepts but doesn't require.
 </Note>
 
 The Python environment can process various file types uploaded through the Files API, including: