Jules March 9, 2026 Changelog
What changed in Jules agent March 9, 2026, released 2026-03-09 — explained in plain English.
- Jules has upgraded its default AI "brain" to Google's new Gemini 3.1 Pro model.
- This new version is smarter and much better at tackling complex, multi-step problems.
- The upgrade is automatic and free for all Google Pro plan users.
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If you use the Google Pro plan, this update is a big deal for you. By swapping out the older Gemini 3 Pro model for the newer 3.1 Pro, Jules is getting a major brain upgrade. This means the assistant will be much more helpful when you ask it to write, code, or help you think through tough projects.
What's new
- Gemini 3.1 Pro is now the default: For Google Pro plan users, Jules will now automatically use Gemini 3.1 Pro. An AI "model" is the underlying engine that processes your questions and generates answers, and you are now getting a much newer, more capable engine.
Improvements
- Better problem-solving: The new Gemini 3.1 Pro model is smarter and more capable than the previous version, making it much better at handling complex logic and difficult, detailed questions.
Breaking changes
No breaking changes in this release.
This is our plain-language summary. Read the complete, official notes on the Jules official changelog ↗.
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