# Anthropic Python SDK v1.2.0

- Product: Anthropic Python SDK (https://whatsnew.fyi/product/anthropic-sdk-python)
- Vendor: Anthropic
- Date: 2026-08-27
- Version: v1.2.0
- Original notes: https://github.com/anthropics/anthropic-sdk-python/releases/tag/v1.2.0
- Permalink: https://whatsnew.fyi/product/anthropic-sdk-python/releases/v1.2.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Beta files/skills namespaces now use GA shapes and drop dated beta header pins
- **fixed** — Sign raw request bytes so binary file uploads work with AWS and Bedrock
- **fixed** — Make event accumulator forward-compatible with new event types in sessions
- **fixed** — Allow read to return a view_range of a file over the size cap in tools
- **fixed** — Preserve exact file bytes in the agent toolset and memory tool without newline translation
- **fixed** — Require headers to be passed to unwrap() in webhooks

##### 1.2.0 (2026-08-27)

Full Changelog: [v1.1.0...v1.2.0](https://github.com/anthropics/anthropic-sdk-python/compare/v1.1.0...v1.2.0)

###### Features

* **api:** beta files/skills namespaces use GA shapes; drop dated beta header pins ([9df4565](https://github.com/anthropics/anthropic-sdk-python/commit/9df4565fdfe4eec941809a0a3d1615ee11e16b68))


###### Bug Fixes

* **aws,bedrock:** sign raw request bytes so binary file uploads work ([#531](https://github.com/anthropics/anthropic-sdk-python/issues/531)) ([f50e910](https://github.com/anthropics/anthropic-sdk-python/commit/f50e9106c002d71966f5f8027758b3d703999936))
* **ci:** resolve assignment aliases in detect-breaking-changes ([f2c4925](https://github.com/anthropics/anthropic-sdk-python/commit/f2c49254941b4d700fe97cbe6bb85205b06a6460))
* **sessions:** make event accumulator forward-compatible with new event types ([#533](https://github.com/anthropics/anthropic-sdk-python/issues/533)) ([cbbaf6e](https://github.com/anthropics/anthropic-sdk-python/commit/cbbaf6e46358d5c844eac01ed3c50a797daf93a7))
* **tools:** let read return a view_range of a file over the size cap ([#538](https://github.com/anthropics/anthropic-sdk-python/issues/538)) ([b68e876](https://github.com/anthropics/anthropic-sdk-python/commit/b68e876345bde1ecc099ef245e87b1319dc8d080))
* **tools:** preserve exact file bytes in the agent toolset and memory tool (no newline translation) ([#540](https://github.com/anthropics/anthropic-sdk-python/issues/540)) ([56921a8](https://github.com/anthropics/anthropic-sdk-python/commit/56921a8c04e0ec71192fcd22dd28db2a5e1306f7))
* **webhooks:** require headers to be passed to `unwrap()` ([0baa902](https://github.com/anthropics/anthropic-sdk-python/commit/0baa90225359f6b4bec50476c19bb52c2ad4250d))


###### Documentation

* **api:** clarify pagination on the organization rate-limit list endpoints ([1832b27](https://github.com/anthropics/anthropic-sdk-python/commit/1832b27d0751943640cb898bb77c088ea3f24acb))