Gemini 3.1 Pro Preview
Provider：Google
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. Building on the multimodal foundation...
Key specs
- Context：1M
- Max output：65.5K
- Tokenizer：Gemini
- Released：2026-02-19
Token pricing
- Input price：$2.00 / 1M tokens
- Output price：$12.00 / 1M tokens
- Cache read：$0.200 / 1M tokens
- Cache write：$0.375 / 1M tokens
- Blended price：$4.50 / 1M tokens
- Image price：$0.0020 / image
Modalities
Audio, File, Image, Text, Video
Use Cases
- Deep Reasoning & Analysis：Process long legal docs, academic papers, financial reports; multi-hop reasoning and evidence-chain tracing across huge contexts.（≈ $0.096/call）
- Vision Understanding & Generation：Recognize data trends in charts, OCR scanned docs, analyze photos and produce structured reports.（≈ $0.072/call）
- Voice Interaction：Speech recognition & transcription, mixed CN/EN and dialect support — meeting notes, QA.
When to pick this model
Signals derived from public pricing and spec fields — not a benchmark. Validate with official docs and your own eval.
- Long context (>=1M tokens): well-suited for long-doc QA, code-base analysis, multi-turn agents.
- Long max output (>=30K tokens): strong fit for deep report / essay / document-drafting workflows.
- Multimodal (text+image): fit for image captioning, OCR, chart QA, vision-grounded reasoning.
- Audio support: fit for speech-to-text / voice agent / transcript analysis.
- Video input support: fit for video understanding, frame QA, content moderation.
- File / PDF input support: fit for document parsing, contract review, RAG over private data.
FAQ
- What is the token pricing of Gemini 3.1 Pro Preview? Input price $2.00 / 1M tokens, output price $12.00 / 1M tokens, blended about $4.50 / 1M tokens. Refer to Google’s official page for the exact rate.
- What context window does Gemini 3.1 Pro Preview support? Context window is 1M, max output about 65.5K, suitable for long documents, multi-turn chat and complex reasoning.
- What scenarios is Gemini 3.1 Pro Preview best for? Based on its capability and pricing, Gemini 3.1 Pro Preview fits best: Deep Reasoning & Analysis, Vision Understanding & Generation, Voice Interaction. See the Use Cases section for details and cost estimates.
- What input/output modalities does Gemini 3.1 Pro Preview support? Supports Audio, File, Image, Text, Video modality.
- Is Gemini 3.1 Pro Preview a free model? Gemini 3.1 Pro Preview is billed per token, not a free model.
- Which provider offers Gemini 3.1 Pro Preview? Gemini 3.1 Pro Preview is offered by Google.
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Full info：Gemini 3.1 Pro Preview