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Gemini 3.1 Pro (Preview) (Quartz)
google·google/gemini-3.1-pro-preview-2·GA·Closed·gemini-pro series
Reasoning-first Gemini preview for agentic coding and complex problem solving
At a glance
Reference price$2.00 / $12.00 per 1M
Cache read $0.20 · LLM Gateway
Lowest paid$2.00 / $12.00
LLM Gateway Gateway
Context1,048,576
Output limit65,536
Capabilities
✓ Reasoning✓ Tool use✓ Structured output✓ Temperature✓ Attachments
Modalities
TextImageVideoAudioPDF
Knowledge cutoff2025-01
Released / updated2026-02-19 / 2026-02-19
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 1 providers1 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| LLM Gateway quartz/gemini-3.1-pro-preview | Gateway | $2.00 tiered >200K: $4.00 | $12.00 | $0.20 | — | 1,048,576 | 65,536 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1LLM Gateway$784.00
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
effort = loweffort = mediumeffort = high
Related models
Gemini 3.5 Live Translate Previewsame series$3.50 / $21.00Gemini 3 Pro Imagesame series$2.00 / $12.00Nano Banana Prosame series$2.00 / $120GLM-5.2cheaper alternative$1.40 / $4.40DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28DeepSeek V4 Flash 0731cheaper alternative$0.479 / $1.44
Price historyone sample accumulated per data sync
Input list $2.00Output list $12.00Min blended $4.50
Price history accumulates from each data sync; currently only 1 sample(s) (2026-08-21). Each future sync adds a point, and once accumulated a line is drawn here.