What changed in Anthropic Python SDK from 0 to 1

1.4.0 (2026-09-04)

Full Changelog: v1.3.0...v1.4.0

Features

• api: add Claude Tag category and user breakdowns to usage reports (9fce1e4)
• api: add named types for organization compliance settings state (1de1957)
• api: add support for sending a workspace ID on more endpoints (d1d2c01)

Bug Fixes

• client: raise a clear error when an httpx object is passed instead of an httpx2 one (9447099)
• repair custom-code merge in messages resources (#580) (85454ca)

Chores

• examples: refresh platform model IDs (#499) (182abb5)
• internal: bundle the mock server spec and update dev tooling (f9b0cf2)
• internal: clean up code comments (#578) (d202327)
• internal: fix mypy unreachable error in detect-breaking-changes script (07834f6)
• internal: narrower codeowners scope (daca8f1)
• internal: revert codeowners change (41aa767)
• tests: remove stale warning filters (ba9bf35)
• tests: reword the skip reason on the path-level query param tests (6b5046a)

Documentation

• api: update a few doc strings (26c509d)

1.3.0 (2026-09-01)

Full Changelog: v1.2.0...v1.3.0

Features

• api: beta user profiles: add external_user_onboarded_at, remove relationship in favor of access_type (74080c3)
• api: manual updates (1dc3ce0)
• api: organization compliance settings, user-profile order_by, memory-store and toolset schema updates (429e719)

Bug Fixes

• aws: resolve base_url from aws_region under skip_auth and with_options (#564) (b6d1732)
• batches: add results to GA raw/streaming response wrappers (cbf9715)
• ci: don't hard-wrap detect-breaking-changes output (b5be779)
• client: derive multipart filename for file tuples passed without one (a9f3fb4)
• types: remove unused wire aliases from header and path params (dc0a9ab)

Chores

• internal: drop the unused discriminator argument from PropertyInfo (3dae6fd)
• internal: drop the unused distro dependency (a47d85f)

Documentation

• changelog: detail the beta files/skills GA-shape change (#1900) (7c84e13)

Refactors

• types: mark discriminated unions with UnionDiscriminator instead of PropertyInfo (17df0bf)
• types: use UnionDiscriminator for more discriminated unions (b44af2c)

1.2.0 (2026-08-27)

Full Changelog: v1.1.0...v1.2.0

Features

• api: beta files/skills namespaces use GA shapes; drop dated beta header pins (9df4565)

Bug Fixes

• aws,bedrock: sign raw request bytes so binary file uploads work (#531) (f50e910)
• ci: resolve assignment aliases in detect-breaking-changes (f2c4925)
• sessions: make event accumulator forward-compatible with new event types (#533) (cbbaf6e)
• tools: let read return a view_range of a file over the size cap (#538) (b68e876)
• tools: preserve exact file bytes in the agent toolset and memory tool (no newline translation) (#540) (56921a8)
• webhooks: require headers to be passed to unwrap() (0baa902)

Documentation

• api: clarify pagination on the organization rate-limit list endpoints (1832b27)

1.1.0 (2026-08-26)

Full Changelog: v1.0.0...v1.1.0

Features

• api: add updates thinking display mode (beta) (eb4a73f)
• api: add missing anthropic-beta values (dbebd15)
• api: add support for Organization API endpoints (5a5b8fc)

Bug Fixes

• docs: correct link for long requests error (#1884) (4474f31), closes #1883
• tools: keep the tool runner going on pause_turn (#343) (ab1ec60)

Chores

• docs: clarify skill version latest support and memory version retention (a754f3b)
• internal: cancel superseded CI runs (c061ab1)
• internal: minor workflow reformat (1569002)
• internal: remove the legacy response API (a48b1dd)
• internal: use import httpx2 directly instead of aliasing as httpx (628d789)

Documentation

• api: clarify session thread agent and usage.iterations compaction descriptions (beta) (4ace503)

1.0.0 (2026-08-20)

Full Changelog: v0.125.0...v1.0.0

⚠ BREAKING CHANGES

• client: upgrade to httpx2 and some minor breaking changes. See MIGRATION.md for details

Features

• client: upgrade to httpx2 and some minor breaking changes. See MIGRATION.md for details (33e2967)

Bug Fixes

• beta: stop warning about output_format= on the parse/stream/tool_runner helpers (59bf261)

Chores

• streaming: restore the original event imports in lib/streaming/_types.py (87e9e01)

Documentation

• examples: use adaptive thinking in thinking examples (b5870af)