Sourced from fastapi's releases.

0.127.0

Breaking Changes

• 🔊 Add deprecation warnings when using pydantic.v1. PR #14583 by @​tiangolo.

Translations

• 🔧 Add LLM prompt file for Korean, generated from the existing translations. PR #14546 by @​tiangolo.
• 🔧 Add LLM prompt file for Japanese, generated from the existing translations. PR #14545 by @​tiangolo.

Internal

• ⬆️ Upgrade OpenAI model for translations to gpt-5.2. PR #14579 by @​tiangolo.

0.126.0

Upgrades

• ➖ Drop support for Pydantic v1, keeping short temporary support for Pydantic v2's pydantic.v1. PR #14575 by @​tiangolo.
  • The minimum version of Pydantic installed is now pydantic >=2.7.0.
  • The standard dependencies now include pydantic-settings >=2.0.0 and pydantic-extra-types >=2.0.0.

Docs

• 📝 Fix duplicated variable in docs_src/python_types/tutorial005_py39.py. PR #14565 by @​paras-verma7454.

Translations

• 🔧 Add LLM prompt file for Ukrainian, generated from the existing translations. PR #14548 by @​tiangolo.

Internal

• 🔧 Tweak pre-commit to allow committing release-notes. PR #14577 by @​tiangolo.
• ⬆️ Use prek as a pre-commit alternative. PR #14572 by @​tiangolo.
• 👷 Add performance tests with CodSpeed. PR #14558 by @​tiangolo.

0.125.0

Breaking Changes

• 🔧 Drop support for Python 3.8. PR #14563 by @​tiangolo.
  • This would actually not be a breaking change as no code would really break. Any Python 3.8 installer would just refuse to install the latest version of FastAPI and would only install 0.124.4. Only marking it as a "breaking change" to make it visible.

Refactors

• ♻️ Upgrade internal syntax to Python 3.9+ 🎉. PR #14564 by @​tiangolo.

Docs

• ⚰️ Remove Python 3.8 from CI and remove Python 3.8 examples from source docs. PR #14559 by @​YuriiMotov and @​tiangolo.

Translations

... (truncated)

• c4a1ab5 🔖 Release version 0.127.0
• 22c7200 📝 Update release notes
• 6e42bcd 🔊 Add deprecation warnings when using pydantic.v1 (#14583)
• 6513d4d 📝 Update release notes
• 1d93d53 ⬆️ Upgrade OpenAI model for translations to gpt-5.2 (#14579)
• c2c1cc8 📝 Update release notes
• 5289259 🔧 Add LLM prompt file for Korean, generated from the existing translations (#...
• 5783910 📝 Update release notes
• 026b43e 🔧 Add LLM prompt file for Japanese, generated from the existing translations ...
• 6b591dd 📝 Update release notes
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