Google
LLM
Big
Closed weights
Gemini 3.1 Pro
266 days since Google announced it ·
Gemini 3.1 Pro is a closed-weights LLM from Google, announced 19 Feb 2026. It costs $2 per 1M input tokens and $12 per 1M output tokens. Its context window is 1M tokens.
- Input
- $2
- per 1M tokens
- Cache write
- —
- per 1M tokens
- Cache read
- $0.20
- per 1M tokens
- Output
- $12
- per 1M tokens
- Context window
- 1M
- tokens
- Parameters
- —
- not disclosed
- Announcement
- blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-1-pro
- Docs
- ai.google.dev/gemini-api/docs/models/gemini-3.1-pro-preview
Our coverage
We haven’t written about Gemini 3.1 Pro yet.
Google · Big · Pro
closed weights- Gemini 3.1 Pro +93d
- Gemini 3 Pro
More from Google
All modelsFacts last updated , from Google’s own pages.