Anthropic TypeScript SDK v0.121.0

0.121.0 (2026-08-26)

Full Changelog: sdk-v0.120.0...sdk-v0.121.0

Features

• api: add updates thinking display mode (beta) (22274ea)
• api: add missing anthropic-beta values (0779f02)
• api: add support for Organization API endpoints (8b61e7a)
• helpers: support Standard Schema for structured outputs and tools (7880078)

Bug Fixes

• tools: keep the tool runner going on pause_turn (#288) (f040dc9)
• types: don't reference NodeJS.ProcessEnv from published types (#367) (fd38dfd)

Chores

• docs: clarify skill version latest support and memory version retention (7405a69)
• examples: remove redundant main().catch boilerplate (154ace7)
• internal: cancel superseded CI runs (0532c98)
• internal: codegen related update (228ff1e)
• internal: minor workflow reformat (41b6c31)
• internal: tighten publint and attw lint checks (e3fbd62)

Documentation

• api: clarify session thread agent and usage.iterations compaction descriptions (beta) (6e852a7)
• examples: use adaptive thinking in thinking examples (3dd7699)