Google · Model release
Gemini 3.1 Pro: long context and multimodal input in limited preview
Gemini 3.1 Pro targets very long documents and multimodal pipelines, but its limited-preview status and weak agentic-coding signal mean fit should be validated before a broad rollout.
What changed
- Google positioned 3.1 Pro as the Pro tier with a 1.05M-token context window and multimodal input.
- Pricing steps up above 200K tokens, which matters for long-document workloads.
- The model remains in limited preview rather than a default production tier.
Best fit
- Very long documents
- Multimodal input
- Google Workspace integration
What to be careful about
- Recorded DeepSWE pass rates are far below other catalogued models — weak on agentic coding specifically.
- Prompts above 200K tokens move to a higher rate card.
Dataset snapshot: Gemini 3.1 Pro is also represented in the checked comparison dataset. Prices and benchmark figures carry their own field dates.