Model · Google · Text
Gemini 3.1 Pro Preview
Google's top Gemini 3-series model for advanced reasoning, coding, and agentic workflows. Superseded by Gemini 4 Argon (2026-10-13) as Google's flagship, but still served.
- Modality
- Text
- License
- Proprietary (Proprietary)
- Context window
- 1,048,576 tokens
- Released
- February 19, 2026
- Last verified
- October 28, 2026
- Runs locally
- No
- Also handles
- vision
Strengths
- 1M-token context window
- Optimized for software engineering and multi-step agent workflows
- Supports code execution, function calling, grounding, and URL context
Weaknesses
- Preview model — production use needs rollout caution
- Closed weights
Try it
| Where | Type | Notes |
|---|---|---|
| Google AI Studio | hosted-api | Preview access |
| Vertex AI | hosted-api | GCP enterprise |
Version history
- Gemini 3.8 Flash Sep 2026
- Gemini 3.5 Flash-Lite Jul 2026
- Gemini 3.5 Flash May 2026 Deprecated
- Gemini 3.1 Flash-Lite May 2026 Deprecated
- Gemini 3.1 Flash Live Preview Mar 2026 Deprecated
Official sources
- Model docs docs
Change log
- — Deprecated — superseded by Gemini 4 Argon (released 2026-10-13). Still served, with no shutdown date on Google's deprecations page. Release date corrected to 2026-02-19 from Google's changelog and deprecations page; the previous 2026-05-07 was the models page's global 'last updated' stamp.
- — Verified current. Still the top Pro model on Google's docs — Gemini 3.5 Pro was announced at I/O, missed three times and reportedly shelved to pretrain Gemini 4. No Pro model newer than this exists.
- — Added after verification of the Gemini 3 family rollout in current Google model docs.
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