Claude 3.7 Sonnet vs Gemini 3 Flash Vision: which model should you choose?
We compared Claude 3.7 Sonnet and Gemini 3 Flash Vision on price, context window and 12 benchmarks. Gemini 3 Flash Vision has the stronger average benchmark score; Claude 3.7 Sonnet is cheaper on a blended 3:1 basis.
Claude 3.7 Sonnet
Claude 3.7 Sonnet is a multimodal model from Anthropic. It offers a 200,000-token context window, costs $14.91 per million input tokens and $74.27 per million output tokens, and averages 81.6 across the index's benchmark suite.
- Input
- $14.91 / 1M
- Output
- $74.27 / 1M
- Context
- 200,000
- Avg score
- 81.6
- Open weights
- No
Gemini 3 Flash Vision
Gemini 3 Flash Vision is a multimodal model from Google DeepMind. It offers a 400,000-token context window, costs $15.06 per million input tokens and $82.14 per million output tokens, and averages 81.9 across the index's benchmark suite.
- Input
- $15.06 / 1M
- Output
- $82.14 / 1M
- Context
- 400,000
- Avg score
- 81.9
- Open weights
- No
Specification comparison
| Spec | Claude 3.7 Sonnet | Gemini 3 Flash Vision | Edge |
|---|---|---|---|
| Input price / 1M | $14.91 | $15.06 | A |
| Output price / 1M | $74.27 | $82.14 | A |
| Context window | 200,000 | 400,000 | B |
| Max output | 128,000 | 32,768 | A |
| Average score | 81.6 | 81.9 | B |
| Arena Elo | 1451.9 | 1430.3 | A |
| Open weights | No | No | Tie |
Benchmark comparison
Claude 3.7 Sonnet wins 7, Gemini 3 Flash Vision wins 5, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Claude 3.7 Sonnet | Gemini 3 Flash Vision | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 83.5 | 81.8 | 1.7 | Claude 3.7 Sonnet |
| GPQA Diamond | 80.2 | 75.7 | 4.5 | Claude 3.7 Sonnet |
| SWE-bench Verified | 70.1 | 71.4 | 1.3 | Gemini 3 Flash Vision |
| HumanEval | 85.7 | 84.5 | 1.2 | Claude 3.7 Sonnet |
| MATH-500 | 88.9 | 87.5 | 1.4 | Claude 3.7 Sonnet |
| AIME 2025 | 81.2 | 82.4 | 1.2 | Gemini 3 Flash Vision |
| LiveCodeBench | 75.0 | 73.2 | 1.8 | Claude 3.7 Sonnet |
| IFEval | 88.5 | 86.9 | 1.6 | Claude 3.7 Sonnet |
| TruthfulQA | 81.7 | 85.5 | 3.8 | Gemini 3 Flash Vision |
| HellaSwag | 87.6 | 91.5 | 3.9 | Gemini 3 Flash Vision |
| MMMU | 75.5 | 80.3 | 4.8 | Gemini 3 Flash Vision |
| Arena Elo | 1451.9 | 1430.3 | 21.6 | Claude 3.7 Sonnet |
Price analysis
On a blended 3:1 input-to-output basis, Claude 3.7 Sonnet costs about $29.75 per million tokens and Gemini 3 Flash Vision costs about $31.83. Claude 3.7 Sonnet is roughly 7% cheaper than Gemini 3 Flash Vision. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Gemini 3 Flash Vision has the larger context window at 400,000 tokens, compared with 200,000 for Claude 3.7 Sonnet. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Claude 3.7 Sonnet wins 7, Gemini 3 Flash Vision wins 5, and 0 are tied. On the index average, Gemini 3 Flash Vision leads Claude 3.7 Sonnet by 0.3 points (81.9 versus 81.6).
The price picture favours Claude 3.7 Sonnet. The context picture favours Gemini 3 Flash Vision. Those two dimensions often matter more than a few benchmark points once a model is good enough for the task.
If you need a single default, start with Gemini 3 Flash Vision for quality-sensitive work and Claude 3.7 Sonnet for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.
Choose Claude 3.7 Sonnet if
- Unit cost matters and you want the cheaper blended price.
- You need the larger 128,000-token output limit.
Choose Gemini 3 Flash Vision if
- You want the higher average benchmark score in this index.
- You need the larger 400,000-token context window.
FAQ
Is Claude 3.7 Sonnet better than Gemini 3 Flash Vision?
On the index average, Gemini 3 Flash Vision leads Claude 3.7 Sonnet by 0.3 points (81.9 versus 81.6). The better choice depends on price, context and your task. Claude 3.7 Sonnet wins 7 benchmarks, Gemini 3 Flash Vision wins 5.
Which is cheaper, Claude 3.7 Sonnet or Gemini 3 Flash Vision?
Claude 3.7 Sonnet is cheaper on a blended 3:1 basis at about $29.75 per million tokens, versus $31.83 for Gemini 3 Flash Vision.
Which has the larger context window?
Gemini 3 Flash Vision has the larger context window at 400,000 tokens. Claude 3.7 Sonnet has 200,000 tokens.
Are these models open weights?
Claude 3.7 Sonnet is proprietary; Gemini 3 Flash Vision is proprietary.
Which should I choose for production?
If you need a single default, start with Gemini 3 Flash Vision for quality-sensitive work and Claude 3.7 Sonnet for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.