Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools is worth evaluating for rag, long context, and vision when its provider route and context window match the workload.
Use it for
- Teams evaluating rag, long context, and vision
- Workloads that can use a 1m context window
- Buyers comparing 1 tracked provider route
Do not use it for
- Workloads where another current model has stronger sourced task evidence
- Family
- Gemini 3.1
- Released
- 2026-01-01
- Context
- 1m
- Architecture
- Decoder Only
- Knowledge cutoff
- 2025-01
- Specialization
- general
- Openness
- Proprietary
- License
- ProprietaryCommercial use: conditional
- Weights
- Not released
- Code
- Unknown
Cheapest of 1 route · OpenRouter
About
Google: Gemini 3.1 Pro Preview Custom Tools available via OpenRouter. Pricing: $2/1M input, $12/1M output.
Gemini 3.1 Pro Preview Custom Tools is a proprietary model in the Gemini 3.1 family. The structured metadata tracks a 1m-token context window, multimodal input, and structured outputs. This page tracks provider routes through OpenRouter, with the cheapest tracked route listed at $2 input and $12 output per 1M tokens. No headline benchmark score is tracked for Gemini 3.1 Pro Preview Custom Tools yet.
Top use-case fit
RAG
Included by capability and metadata signals in the decision map.
Long context
Included by capability and metadata signals in the decision map.
Vision
Included by capability and metadata signals in the decision map.
Provider price ladder
Compare API pricing across 1 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| OpenRouter | $2.00 | $12.00 | Serverless |
Capabilities
Benchmark peer barsfor RAG
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
Compare Gemini 3.1 Pro Preview Custom Tools with other models
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- Gemini 3.1 Pro Preview Custom Tools vs Xiaomi MiMo-V2.5-Pro20
- Gemini 3.1 Pro Preview Custom Tools vs GPT-5.5 Pro14
- Gemini 3.1 Pro Preview Custom Tools vs Qwen3-Max10
- Gemini 3.1 Pro Preview Custom Tools vs GPT-5.2 Codex7
- Gemini 3.1 Pro Preview Custom Tools vs Phi-4 Mini Flash Reasoning4
Comparison and alternatives
Browse all comparisons →Show all 5 popular comparisonssorted by 7-day search impressions
Frequently asked questions
What is the context window of Gemini 3.1 Pro Preview Custom Tools?
Gemini 3.1 Pro Preview Custom Tools has a context window of 1m tokens.
How much does Gemini 3.1 Pro Preview Custom Tools cost?
Gemini 3.1 Pro Preview Custom Tools is available at $2/1M input tokens through OpenRouter.
When was Gemini 3.1 Pro Preview Custom Tools released?
Gemini 3.1 Pro Preview Custom Tools was released on 2026-01-01.
Which providers offer Gemini 3.1 Pro Preview Custom Tools?
Gemini 3.1 Pro Preview Custom Tools is available from 1 provider: OpenRouter.
Cheapest of 1 route · OpenRouter