Gemini 3.1 Pro Preview Custom Tools: API pricing, providers and specs
Gemini 3.1 Pro Preview Custom Tools is a text model by Google. 5 providers serve it, from $10.80 to $18 /1M; the lowest price is at APIYI.
How Gemini 3.1 Pro Preview Custom Tools compares
Against the 737 text models on the site priced the same way.
- Pricey for its class: at $10.80 /1M, its lowest price is above 89% of comparable models (median $1.10).
- Its 1.05M-token context window is larger than 83% of them (median 262K), about 1570 pages of text.
- 5 providers serve it; 65% of comparable models have fewer.
Gemini 3.1 Pro Preview Custom Tools prices by provider
Every provider's list price, read from its own price page or API. A price marked “from” changes with context length, resolution or mode.
| Provider | Input | Output | Prompt caching | Context |
|---|---|---|---|---|
 APIYI | $1.80/1M | $10.80/1M | — | — |
 AIHubMix | $2/1M | From$12/1M | $0.20/1M | 1.05M |
| OpenRouter | $2/1M | From$12/1M | $0.20/1M | 1.05M |
| AI/ML API | $2.12/1M | $12.70/1M | $0.212/1M | — |
 OrcaRouter | $4/1M | $18/1M | $0.40/1M | 1.05M |
- APIYI$10.80
- AIHubMixFrom$12
- OpenRouterFrom$12
- AI/ML API$12.70
- OrcaRouter$18
Specs
- Type
- Text
- Maker
- Inputs
- Audio, Image, Text, Video
- Outputs
- Text
- Context
- 1.05M≈ 1570 pages of text
- Max output
- 66K
- Capabilities
- Prompt caching, JSON, Reasoning, Tool calling, Vision
- Released
- Feb 25, 2026
- License
- proprietary
- Open weights
- No, API only
Alternatives to Gemini 3.1 Pro Preview Custom Tools
Same kind of model from other makers, at a similar price.
| Model | Lowest price | Context | Arena | Providers |
|---|---|---|---|---|
| Gemini 3.1 Pro Preview Custom Toolsthis model | $10.80/1M | 1.05M | — | 5 |
| Kimi K3 | $8.28/1M | 1.05M | 1655 | 47 |
| GPT-6 Astra | $25/1M | 1.05M | 1775 | 31 |
 Muse Wonder | $16/1M | 1.05M | — | 14 |
| Claude Opus 5.5 | $16/1M | 1M | 1807 | 33 |
| GPT-6.1 Sol | $8/1M | 1.05M | 1749 | 27 |
| GPT-6 Sol | $8/1M | 1.05M | 1682 | 28 |
 Qwen3.8 2.4T A95B | $4.11/1M | 1M | — | 22 |
| Grok 4.7 | $4.80/1M | 500K | 1637 | 28 |
More from Google
Gemini 4 ArgonGoogle$8/1MNano Banana 2Google$0.067/imgVeo-3Google$2.50/runNano Banana Pro PreviewGoogle$0.09/runGemini Omni 1.1Google$0.05/secNano Banana 2.1Google$6/1MGemini 3 FlashGoogle$2.40/1MVeo 3.1Google$0.16/secGemini 3.1 Pro Preview Custom Tools FAQ
The lowest price for Gemini 3.1 Pro Preview Custom Tools is $10.80 /1M, at APIYI.
APIYI, at $10.80 /1M. 5 providers serve Gemini 3.1 Pro Preview Custom Tools; the table above lists every one with its price.
Gemini 3.1 Pro Preview Custom Tools reads up to 1.05M tokens per request and writes up to 66K.
No. Gemini 3.1 Pro Preview Custom Tools is only available through an API; Google does not publish its weights.
5 API providers serve Gemini 3.1 Pro Preview Custom Tools. Compare their prices above, or open a provider to see everything it offers.
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