Claude Sonnet 5.5 vs Gemini 3.1 Pro Preview Custom Tools
Price and specs side by side · USD per 1M tokens · verified 2026-10-11
// side by side
| metric | Claude Sonnet 5.5 | Gemini 3.1 Pro Preview Custom Tools |
|---|---|---|
| input / 1M | $2.00 | $2.00 |
| output / 1M | $10.00 | $12.00 |
| blended (3:1) | $4.00 | $4.50 |
| cache read / 1M | $0.10 | $0.20 |
| context | 1M | 1.05M |
| max output | 128K | 65.5K |
| input types | text · image · pdf | text · image · video · audio · pdf |
| reasoning | yes | yes |
| tool calling | yes | yes |
| structured output | yes | yes |
| open weights | no | no |
| released | 2026-09-28 | 2026-02-19 |
| knowledge cutoff | 2026-06 | 2025-01 |
| lab | Anthropic |
// monthly cost scenarios
| workload | tokens in / out | Claude Sonnet 5.5 | Gemini 3.1 Pro Preview Custom Tools |
|---|---|---|---|
| Chatbot | 10M / 2M | $40.00 | $44.00 |
| RAG app | 50M / 5M | $150 | $160 |
| Coding agent | 20M / 10M | $140 | $160 |
// verdict
- Claude Sonnet 5.5 is 11.1% cheaper than Gemini 3.1 Pro Preview Custom Tools on a blended 3:1 input/output basis.
- Gemini 3.1 Pro Preview Custom Tools has the larger context window (1.05M vs 1M tokens).