tiangolo

FastAPI & Pydantic

wire 2026-11-09

Pydantic fixes GC tracking in pydantic-core and caches UTC TzInfo

• » 🌐 Update Korean translations to match the English docs fastapi/fastapi

FastAPI & Pydantic

wire 2026-11-08

Pydantic drops Python 3.10, accepts list and DecimalTuple for Decimal

• » 📝 Add guidance for developing FastAPI apps with AI (#16695) fastapi/fastapi
• » 📝 Add AI development guidance and coding agent notices (#2127) tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-11-05

Pydantic measures duplicate TypedDict schema cost, FastAPI drops conference rail

• » 🔧 Update sponsors: add Encore (#16683) fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-24

FastAPI stops inferring False for omitted boolean form fields

• » 🐛 Restore default handling for omitted boolean form fields fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-23

FastAPI 0.160.0 widens the blast radius of parameter model extras

• » ✨ Add support for combining unions of form models fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-22

Optional parameter models for query, header, cookie, and form params

• » ✨ Add support for optional query, header, and cookie parameter models fastapi/fastapi
• » ✨ Add support for optional form models fastapi/fastapi
• » 🐛 Respect model alias settings for query, header, and cookie parameters fastapi/fastapi
• » 🐛 Fix `AliasChoices` for path parameters fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-21

FastAPI 0.155.0 removes the deprecated **extra escape hatch

• » ✨ Add Pydantic validation options to request parameters fastapi/fastapi
• » 🐛 Distinguish JSON null from omitted body values fastapi/fastapi
• » 🔥 Remove deprecated `**extra` from request parameters fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-20

FastAPI 0.150.0 treats empty file inputs as missing

• » 🐛 Treat unselected browser file inputs as missing fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-19

FastAPI deprecates root_path and drops openapi_prefix

• » 🔥 Remove deprecated `openapi_prefix` and unused `**extra` from `FastAPI` fastapi/fastapi
• » 🗑️ Deprecate the `root_path` parameter in `FastAPI` fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-18

FastAPI 0.143.4 ships with httpx2 added to optional dependencies

• » ⬆️ Add httpx2 to optional dependencies fastapi/fastapi
• » ⬆️ Add httpx2 to optional dependencies (#16512) fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-17

FastAPI 0.143.3 fixes non-finite floats in JSONL and SSE streams

• » 🐛 Fix non-finite float serialization in JSONL and SSE streams fastapi/fastapi
• » 🐛 Fix non-finite float serialization in JSONL and SSE streams (#16509) fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-16

FastAPI fixes blocking frontend fallback checks

• » 🐛 Fix blocking frontend fallback file checks (#16503) fastapi/fastapi
• » 🎨 Update Python format in Markdown with Ruff fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-15

pydantic-core GC traversal and unpickling fixes land

• » 🐛 Fix included route metadata in `iter_route_contexts()` fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-09

FastAPI 0.143.0 makes OTel auto-setup opt-in, Pydantic 2.14 lands

• » 💥 Require opt-in for automatic OpenTelemetry exporter setup fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-08

FastAPI isolates telemetry for excluded requests, Pydantic prepares 2.14.0

• » 🐛 Isolate FastAPI telemetry for excluded requests fastapi/fastapi
• » 🐛 Cache OpenTelemetry tracers to preserve warning deduplication fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-07

SQLModel ships 0.0.48 with SQLAlchemy 2.1 support

• » ✨ Add support for SQLAlchemy 2.1 tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-10-06

Pydantic clears two test blockers, SQLModel bumps its whole Python stack

• » 🔧 Update sponsors: remove Render (#16457) fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-05

Pydantic clears lazy import xfails, enables frame pointers

• » 🔧 Update sponsors: remove Render (#16457) fastapi/fastapi

FastAPI & Pydantic

wire 2026-10-01

FastAPI survives an OpenTelemetry failure, pydantic adds create_model namespace

• » 🐛 Allow startup when automatic OpenTelemetry configuration fails fastapi/fastapi

FastAPI & Pydantic

wire 2026-09-30

FastAPI 0.142.0 ships native OpenTelemetry support

• » ✨ Add native OpenTelemetry support fastapi/fastapi
• » 🐛 Fix repeated endpoint wrapping in included routers fastapi/fastapi

FastAPI & Pydantic

wire 2026-09-29

FastAPI drops Permit.io from its sponsor list

• » 🔧 Update sponsors: remove Permit.io (#16406) fastapi/fastapi

FastAPI & Pydantic

wire 2026-09-28

FastAPI drops Permit.io from its sponsor roster

• » 🔧 Update sponsors: remove Permit.io (#16406) fastapi/fastapi

FastAPI & Pydantic

wire 2026-09-24

SQLModel gains PostgreSQL, MySQL, and MariaDB support in 0.0.47

• » ✨ Add direct support for PostgreSQL, MySQL, and MariaDB, include in CI tests tiangolo/sqlmodel
• » ✨ Add direct support for PostgreSQL, MySQL, and MariaDB, include in CI tests (#2103) tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-09-23

SQLModel 0.0.46 ships timedelta fix for UTC datetimes

• » 🐛 Fix timedelta arithmetic with UTC datetime fields tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-09-22

SQLModel 0.0.45 makes UTC datetimes the default

• » ✨ Use UTC datetimes by default tiangolo/sqlmodel
• » 🐛 Fix SQLAlchemy type handling in `Field` (#2095) tiangolo/sqlmodel
• » ♻️ Replace the dataclass_transform shim with typing_extensions tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-09-21

SQLModel narrows SQLAlchemy type handling in Field, drops dataclass_transform shim

• » 🐛 Fix SQLAlchemy type handling in `Field` tiangolo/sqlmodel
• » ♻️ Replace the dataclass_transform shim with typing_extensions tiangolo/sqlmodel
• » 🐛 Fix SQLAlchemy type handling in `Field` (#2095) tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-08-19

Pydantic opens serialization to any core schema

• » 👷 Update translation PR branches with PR Push fastapi/fastapi

FastAPI & Pydantic

wire 2026-08-13

PYDANTIC FIXES GENERIC ALIAS CRASHES, SQLMODEL AND FASTAPI MIGRATE LABEL INFRASTRUCTURE

• » 👷 Migrate automatic labels to Latest Changes fastapi/fastapi
• » 👷 Migrate automatic labels to Latest Changes (#16185) fastapi/fastapi
• » 👷 Migrate automatic labels to Latest Changes tiangolo/sqlmodel
• » 👷 Migrate automatic labels to Latest Changes (#2074) tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-08-11

TIANGOLO CONSOLIDATES CI ACROSS FASTAPI AND SQLMODEL, PYDANTIC TIGHTENS TYPE INTROSPECTION

• » 👷 Remove legacy label check (#16180) fastapi/fastapi
• » 👷 Remove legacy label check (#2072) tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-08-10

FastAPI Locks Down Automation, Pydantic Fixes Regex Flag Loss

• » 🔐 Use PR Submit for automated updates fastapi/fastapi
• » 🔐 Use PR Submit for translations fastapi/fastapi
• » 🐛 Fix Sponsors Git authentication (#16174) fastapi/fastapi
• » ⬆️ Raise pytest-xdist minimum (#16170) fastapi/fastapi

FastAPI & Pydantic

wire 2026-08-09

TIANGOLO LOCKS DOWN WORKFLOW TOKENS ACROSS FASTAPI AND SQLMODEL

• » 🔐 Use PR Submit for pull requests fastapi/fastapi
• » 🔐 Use PR Submit for pull requests tiangolo/sqlmodel
• » 👷 Use GitHub CLI for Git authentication fastapi/fastapi
• » 👷 Use PR Push commit identity fastapi/fastapi
• » 👷 Use GitHub CLI for Git authentication tiangolo/sqlmodel
• » 👷 Use PR Push commit identity tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-08-08

BOTH FASTAPI AND SQLMODEL STRIP ZENSICAL CACHE FROM DOCS BUILDS

• » 👷 Remove Zensical docs cache (#2065) tiangolo/sqlmodel
• » 👷 Remove Zensical docs cache tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-08-07

PYDANTIC EYES PYTHON 3.15, FASTAPI AND SQLMODEL CLEAN HOUSE

• » 🔥 Remove the old Latest Changes workflow (#16148) fastapi/fastapi
• » 🔥 Remove the old Latest Changes workflow (#2064) tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-08-04

PYDANTIC TACKLES CORE SCHEMA PERFORMANCE WHILE FASTAPI DOCS GET A UI FIX

• » 🐛 Use buttons for Termynal controls fastapi/fastapi
• » 🐛 Use buttons for Termynal controls tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-07-30

FASTAPI 0.141.0 SHIPS WITH SMARTER LOCAL DEV, PYDANTIC CUTS VALIDATOR MEMORY BY 25%

• » ✨ Add `app.frontend(check_dir="auto")`, to make local development more convenient with `fastapi dev` fastapi/fastapi
• » 🐛 Fix support for background tasks and headers from dependencies in `app.frontend()` fastapi/fastapi

FastAPI & Pydantic

wire 2026-07-28

FASTAPI DITCHES DEPENDENCY FLATTENING, CUTS OPENAPI GENERATION BLOAT

• » 👷 Add OpenAPI dependency benchmarks fastapi/fastapi
• » ⚡️ Avoid flattening dependencies for OpenAPI fastapi/fastapi
• » ♻️ Update the lru_cache limit for dependencies to account for large apps fastapi/fastapi
• » 👷 Add new memory benchmark fastapi/fastapi
• » ⬆️ Upgrade latest-changes to 0.7.1 tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-07-25

FASTAPI 0.140.0 CUTS MEMORY OVERHEAD IN DEPENDENCIES

• » ⚡️ Reduce memory usage in dependencies fastapi/fastapi
• » 👷 Add CI memory benchmark fastapi/fastapi

FastAPI & Pydantic

wire 2026-07-24

FASTAPI AND SQLMODEL STANDARDIZE ON UV, PYDANTIC DOCS BLOCKED ON SETTINGS DRIFT

• » 📝 Add Library Skills documentation fastapi/fastapi
• » 📝 Add Library Skills documentation tiangolo/sqlmodel
• » 📝 Recommend uv projects by default in docs tiangolo/sqlmodel
• » 📝 Recommend uv projects by default in docs (#2050) tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-07-23

SQLMODEL FIXES TERMYNAL SCROLL JAR ACROSS DOCS

• » 🐛 Prevent Termynal controls from scrolling (#2051) tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-07-22

FASTAPI AND PYDANTIC SHIFT TO UV FOR DOCS AND DEPENDENCIES

• » 📝 Update docs to use uv projects by default fastapi/fastapi
• » 📝 Update help docs tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-07-21

PYDANTIC FIXES TYPE VARIABLE BUG IN SUBCLASS GENERICS

• » 👥 Update FastAPI People - Sponsors fastapi/fastapi

FastAPI & Pydantic

wire 2026-07-16

PYDANTIC CLEANS HOUSE WHILE FASTAPI SYNCS TRANSLATIONS

• » 🌐 Update translations for ru (update-outdated) (#16002) fastapi/fastapi
• » 🌐 Update translations for es (update-outdated) (#15997) fastapi/fastapi
• » 🌐 Update translations for pt (update-outdated) (#16000) fastapi/fastapi
• » 🌐 Update translations for ja (update-outdated) (#15998) fastapi/fastapi

FastAPI & Pydantic

wire 2026-07-15

FASTAPI DOUBLES DOWN ON HINDI DOCS, LLM-FIRST TRANSLATION PIPELINE LIVE

• » 🌐 Update translations for hi (add-missing) fastapi/fastapi
• » 🌐 Update translations for hi (add-missing) fastapi/fastapi
• » 🌐 Update translations for hi (add-missing) (#15990) fastapi/fastapi
• » 🌐 Update translations for hi (add-missing) (#15925) fastapi/fastapi

FastAPI & Pydantic

wire 2026-07-05

FASTAPI AND SQLMODEL PATCH CRITICAL GITHUB ACTIONS FLAW ACROSS THE STACK

• » 👷 Fix notify translations checkout target fastapi/fastapi
• » 👷 Fix latest-changes checkout target fastapi/fastapi
• » 👷 Fix latest-changes checkout target tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-07-04

PYDANTIC PATCHES TYPE VARIABLE BUG AS FASTAPI EXPANDS HINDI DOCS

• » ⬆️ Update issue-manager to 0.8.1 tiangolo/sqlmodel
• » ⬆️ Update latest-changes to 0.6.1 tiangolo/sqlmodel
• » 🌐 Update translations for hi (add-missing) fastapi/fastapi

FastAPI & Pydantic

wire 2026-07-02

FASTAPI DOUBLES DOWN ON DOCS LOCALIZATION WHILE PYDANTIC CLEANS HOUSE

• » 🌐 Update translations for de (add-missing) fastapi/fastapi
• » 🌐 Update translations for fr (add-missing) fastapi/fastapi
• » 🌐 Update translations for uk (add-missing) fastapi/fastapi
• » 🌐 Update translations for tr (add-missing) fastapi/fastapi
• » 🌐 Update translations for zh (add-missing) fastapi/fastapi

FastAPI & Pydantic

wire 2026-06-30

FASTAPI TIGHTENS STATIC FILE HANDLING, PYDANTIC ADDS FRACTION SUPPORT

• » ♻️ Make `app.frontend()` return 404 for methods other than `GET` or `HEAD` with no static file matches fastapi/fastapi
• » 🔧 Update sponsors: remove Stainless fastapi/fastapi

FastAPI & Pydantic

wire 2026-06-28

FASTAPI SPONSORS INFRASTRUCTURE GETS INTERNAL CLEANUP

• » ♻️ Refactor how sponsors data is handled for banners fastapi/fastapi

FastAPI & Pydantic

wire 2026-06-16

FASTAPI DOCS GET MULTILINGUAL OVERHAUL ACROSS FIVE LANGUAGES

• » 🌐 Update translations for fr (update-outdated) fastapi/fastapi
• » 🌐 Update translations for zh-hant (update-outdated) fastapi/fastapi
• » 🌐 Update translations for de (update-outdated) fastapi/fastapi
• » 🌐 Update translations for ko (update-outdated) fastapi/fastapi
• » 🌐 Update translations for uk (update-outdated) fastapi/fastapi

FastAPI & Pydantic

wire 2026-06-15

FASTAPI REWIRES ROUTER INTERNALS, UNBLOCKS MAJOR FEATURES

• » ♻️ Refactor internals to preserve `APIRouter` and `APIRoute` instances fastapi/fastapi
• » 🔖 Release version 0.137.0 fastapi/fastapi
• » 📝 Update release notes fastapi/fastapi

FastAPI & Pydantic

wire 2026-06-01

FASTAPI AUTOMATES ITS OWN RELEASE PIPELINE

• » 👷 Automate release preparation fastapi/fastapi

FastAPI & Pydantic

wire 2026-05-31

FASTAPI AND SQLMODEL SHED LEGACY PACKAGING CRUFT

• » 👷 Automate release preparation tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-05-24

FASTAPI TIGHTENS HEADER VALIDATION AND SSE SAFETY IN RAPID RELEASES

• » ♻️ Do not accept underscore headers when using `convert_underscores=True` (the default) fastapi/fastapi
• » ♻️ Validate Server Sent Event fields to avoid applications from sending broken data fastapi/fastapi
• » ✅ Update tests, don't double dispose the engine fastapi/fastapi

FastAPI & Pydantic

wire 2026-05-23

PYDANTIC SHIPS 2.14.0a1 WITH PYEMSCRIPTEN SUPPORT AS TIANGOLO REPOS CONSOLIDATE CONFIGS

• » 🔥 Remove config files now in central GitHub repo tiangolo/sqlmodel
• » 📝 Update and simplify docs about help and management fastapi/fastapi
• » 📝 Update and simplify docs about help and management tiangolo/sqlmodel

FastAPI & Pydantic

wire 2026-05-20

FASTAPI DOCS LEAVE MKDOCS BEHIND FOR ZENSICAL

• » 🔧 Migrate docs from MkDocs to Zensical fastapi/fastapi
• » 🍱 Update sponsors: TalorData image fastapi/fastapi

FastAPI & Pydantic

wire 2026-05-19

FASTAPI DOCS TRANSLATION BLITZ CONTINUES WHILE SQLMODEL HARDENS DEPENDENCY CONTROLS

• » 🌐 Update translations for ja (update-outdated) fastapi/fastapi
• » 🌐 Update translations for uk (update-outdated) fastapi/fastapi
• » 🌐 Update translations for tr (update-outdated) fastapi/fastapi
• » 🌐 Update translations for ko (update-outdated) fastapi/fastapi
• » 📝 Update docs, simplify usage of admonitions, only default ones fastapi/fastapi
• » ♻️ Migrate docs to Zensical tiangolo/sqlmodel
• » 📝 Update link syntax to minimal Markdown tiangolo/sqlmodel