Release Notes 🚀✨

Thanks to everyone who contributed! Special shoutouts to @3mora2 and @hlohaus for recent fixes and refactors. Below are the highlights for v6.6.2.

Highlights 🏆

• Improved Copilot auth/cookie handling 🛡️

  • Better detection of Copilot anonymous/auth cookies during token retrieval to make login/anonymous flows more reliable.

• LMArena provider fixes & stabilization 🔧

  • Fixed multiple LMArena flow bugs (session/evaluation handling, streaming parsing and event handling).
  • Improved UUIDv7 generation used by LMArena to better match expected browser semantics.
  • More robust handling of model selection and POST/stream endpoints.

• PollinationsAI refactor & model-selection improvements 🎨

  • Refactored model-selection logic and default system behavior.
  • More accurate audio/media detection and automatic switching to audio-capable model when necessary.

• Cloudflare provider adjustments ☁️

  • Marked Cloudflare AI provider as not working by default in this release (working flag set to False).
  • Other internal adjustments to endpoint configuration and nodriver usage.

• OpenAI HAR handling updates 🕵️‍♂️

  • Changes to har_file handling (crypt import handling, StreamSession usage, cookie directory logic) improving robustness when importing HAR files.

• Integration with pydantic_ai rework 🧩

  • Major overhaul of the pydantic_ai integration: new AIModel class now uses chat-model class, response processing, usage parsing, and patched infer_model.
  • This is a substantial internal change — see Migration Notes below.

• Cleanup & deletions 🧹

  • Removed older uuid integration file and other cleanup across integrations/providers.
  • Large number of deletions/cleanup for modernization and simplification (internal reorg).

Bugfixes 🐛

• Fixed LMArena streaming parsing (line prefixes, JSON handling) to reduce false errors and improve finalization events.
• Fixes to Copilot token/cookie loops to avoid waiting forever when cookies are already present.
• PollinationsAI: ensure audio model is selected when attachments contain audio and fix several model aliasing issues.
• Miscellaneous provider improvements, small bugfixes and stability fixes across several providers.

Developer notes / Breaking changes ⚠️

• pydantic_ai integration changed significantly — if you rely on the old behavior/patching, please review the new AIModel and infer_model patching. You may need to update any custom integrations that assumed the previous classes/names.
• Some internal files were removed or renamed (for example: integration/uuid.py was deleted). If you depended on these, please adapt to the new utilities.
• Cloudflare provider marked as not working by default — you may need to enable or patch if you still want to use it.

Performance & internal refactor 🧭

• Several providers were refactored for consistency (stream handling, JsonRequest yields, StreamSession usage).
• Reduced duplicated logic and cleaned many modules for maintainability.

Contributors 🙌

• @3mora2 — auth/cookie improvements, tests/fixes
• @hlohaus — LMArena fixes, PollinationsAI refactor, general cleanups
• Other contributors across the repo — thank you!

How to upgrade 🔼

• Standard pip/installation steps (or pull latest repository). Review CHANGELOG and run tests for providers you rely on, especially if you integrate pydantic_ai or use LMArena/PollinationsAI/Cloudflare providers.

Contact / Help 💬

• If you encounter regressions, please open an issue with logs and repro steps. Include provider name, used model, and any HAR/session data if relevant.

Enjoy v6.6.2 — cleaner internals, more robust providers, and fewer surprises! 🚀🔧✨

Full Changelog: v6.5.7...v6.6.2

g4f v6.6.2

Download Options

Python Package:

• PyPI: pip install g4f==v6.6.2

Executables:

• Windows x64: g4f-windows-v6.6.2-x64.zip
• Linux x64: g4f-linux-v6.6.2-x64
• Linux ARM64: g4f-linux-v6.6.2-arm64
• macOS x64: g4f-macos-v6.6.2-x64
• macOS ARM64: g4f-macos-v6.6.2-arm64

System Packages:

• WinGet: winget install gpt4free

Docker:

• docker pull hlohaus789/g4f:v6.6.2
• docker pull hlohaus789/g4f:v6.6.2-slim

💻 Having trouble with the .exe from this release?
👉 Check out the Windows launcher for GPT4Free instead:
🔗 https://github.com/gpt4free/g4f.exe 🚀