# Anthropic TypeScript SDK v0.115.0 — sdk: v0.115.0

- Product: Anthropic TypeScript SDK (https://whatsnew.fyi/product/anthropic-sdk-typescript)
- Vendor: Anthropic
- Date: 2026-07-24
- Version: v0.115.0
- Original notes: https://github.com/anthropics/anthropic-sdk-typescript/releases/tag/sdk-v0.115.0
- Permalink: https://whatsnew.fyi/product/anthropic-sdk-typescript/releases/v0.115.0

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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- **added** — Add claude-opus-5 model
- **added** — Add tool addition/removal blocks and tool_change events
- **added** — Expand client-side fallback credit token types and add server-side fallbacks default option
- **fixed** — Release abort listeners when requests settle

##### 0.115.0 (2026-07-24)

Full Changelog: [sdk-v0.114.0...sdk-v0.115.0](https://github.com/anthropics/anthropic-sdk-typescript/compare/sdk-v0.114.0...sdk-v0.115.0)

###### Features

* **api:** add claude-opus-5 model ([cdd3606](https://github.com/anthropics/anthropic-sdk-typescript/commit/cdd3606e92745b8a6af07819469cf5dc0636edb2))
* **api:** add tool addition/removal blocks and tool_change events ([cdd3606](https://github.com/anthropics/anthropic-sdk-typescript/commit/cdd3606e92745b8a6af07819469cf5dc0636edb2))
* **api:** expand client-side fallback credit token types and add server-side fallbacks default option ([cdd3606](https://github.com/anthropics/anthropic-sdk-typescript/commit/cdd3606e92745b8a6af07819469cf5dc0636edb2))


###### Bug Fixes

* **client:** release abort listeners when requests settle ([#1129](https://github.com/anthropics/anthropic-sdk-typescript/issues/1129)) ([b85e902](https://github.com/anthropics/anthropic-sdk-typescript/commit/b85e902669c78a8293b5390e93e57dd2e3f6c545))