Model · Google · Text
Gemini 3.1 Pro Preview
Google's top Gemini 3-series model for advanced reasoning, coding, and agentic workflows. It improves the Gemini 3 Pro line with better thinking, tool use, and factual consistency.
- Modality
- Text
- License
- Proprietary (Proprietary)
- Context window
- 1,048,576 tokens
- Released
- May 7, 2026
- Last verified
- September 8, 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 |
Used in solutions
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 Pro Preview May 2026 Current
Official sources
- Model docs docs
Change log
- — 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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