Google: Gemini 3.1 Pro Preview
google/gemini-3.1-pro-preview
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows.
- Context window: 1,048,576 tokens
- Input: audio, file, image, text, video
- Output: text
- Pricing: $2/M input tokens, $12/M output tokens
Community sentiment
Mixed (+1) — 3 positive, 4 negative, 3 neutral across 10 community samples from X and the web, as of 2026-09-22.
Community feedback is mixed: users praise Gemini 3.1 Pro Preview for improved efficiency, reasoning and responsiveness in reviews, while others report it feels refined and fast. At the same time, users complain about availability (instances disappearing from AI Studio) and confusing/pricing issues (token-rate cliffs for long prompts).
- “Sudden big increase in Gemini 3.1 Pro efficiency, logic and overall ... — 5 days ago · 3.1 Pro fixed it no issues. 3.1 Pro though is calling tools, its rough. I use it in some of my review processes and its been killer. , it's a lot better!!!” — the web
- “Type safe ai jev performance review - Facebook — 3 days ago · Gemini 3.1 Pro Preview averages 83 turns at 30%. Gemini 3 Pro is seriously good. Fast, confident, and surprisingly refined. Huge leap. No more ...” — the web
- “Did Gemini 3.1 Pro Preview disappear from @GoogleAIStudio for anyone else? I did almost all my recent work in Gemini AI Studio using 3.1 Pro, and now I can’t find it anymore. It just disappeared without any warning. Anyone else seeing this? https://t.co/KOnDG4Jffn” — X
- “Why can a longer prompt make every token more expensive? Google's Gemini 3.1 Pro Preview charges $2 per million input tokens for prompts up to 200,000 tokens. Above that threshold, the rate becomes $4. Same model. Twice the price per input token. A longer prompt gives the https:/” — X
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