Claude 3.7 Sonnet Vision vs Sonar Pro Reasoning: which model should you choose?
We compared Claude 3.7 Sonnet Vision and Sonar Pro Reasoning on price, context window and 12 benchmarks. Claude 3.7 Sonnet Vision has the stronger average benchmark score; Claude 3.7 Sonnet Vision is cheaper on a blended 3:1 basis.
Claude 3.7 Sonnet Vision
Claude 3.7 Sonnet Vision is a multimodal model from Anthropic. It offers a 400,000-token context window, costs $13.96 per million input tokens and $56.28 per million output tokens, and averages 81.0 across the index's benchmark suite.
- Input
- $13.96 / 1M
- Output
- $56.28 / 1M
- Context
- 400,000
- Avg score
- 81.0
- Open weights
- No
Sonar Pro Reasoning
Sonar Pro Reasoning is a multimodal model from Perplexity. It offers a 128,000-token context window, costs $13.94 per million input tokens and $72.76 per million output tokens, and averages 80.5 across the index's benchmark suite.
- Input
- $13.94 / 1M
- Output
- $72.76 / 1M
- Context
- 128,000
- Avg score
- 80.5
- Open weights
- No
Specification comparison
| Spec | Claude 3.7 Sonnet Vision | Sonar Pro Reasoning | Edge |
|---|---|---|---|
| Input price / 1M | $13.96 | $13.94 | B |
| Output price / 1M | $56.28 | $72.76 | A |
| Context window | 400,000 | 128,000 | A |
| Max output | 8,192 | 32,768 | B |
| Average score | 81.0 | 80.5 | A |
| Arena Elo | 1429.6 | 1439.7 | B |
| Open weights | No | No | Tie |
Benchmark comparison
Claude 3.7 Sonnet Vision wins 6, Sonar Pro Reasoning wins 6, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Claude 3.7 Sonnet Vision | Sonar Pro Reasoning | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 82.5 | 82.6 | 0.1 | Sonar Pro Reasoning |
| GPQA Diamond | 77.3 | 76.2 | 1.1 | Claude 3.7 Sonnet Vision |
| SWE-bench Verified | 72.2 | 71.7 | 0.5 | Claude 3.7 Sonnet Vision |
| HumanEval | 85.4 | 82.7 | 2.7 | Claude 3.7 Sonnet Vision |
| MATH-500 | 84.8 | 85.1 | 0.3 | Sonar Pro Reasoning |
| AIME 2025 | 80.9 | 73.7 | 7.2 | Claude 3.7 Sonnet Vision |
| LiveCodeBench | 75.7 | 75.6 | 0.1 | Claude 3.7 Sonnet Vision |
| IFEval | 87.9 | 87.1 | 0.8 | Claude 3.7 Sonnet Vision |
| TruthfulQA | 81.6 | 84.4 | 2.8 | Sonar Pro Reasoning |
| HellaSwag | 89.4 | 89.9 | 0.5 | Sonar Pro Reasoning |
| MMMU | 73.8 | 76.1 | 2.3 | Sonar Pro Reasoning |
| Arena Elo | 1429.6 | 1439.7 | 10.1 | Sonar Pro Reasoning |
Price analysis
On a blended 3:1 input-to-output basis, Claude 3.7 Sonnet Vision costs about $24.54 per million tokens and Sonar Pro Reasoning costs about $28.65. Claude 3.7 Sonnet Vision is roughly 14% cheaper than Sonar Pro Reasoning. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Claude 3.7 Sonnet Vision has the larger context window at 400,000 tokens, compared with 128,000 for Sonar Pro Reasoning. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Claude 3.7 Sonnet Vision wins 6, Sonar Pro Reasoning wins 6, and 0 are tied. On the index average, Claude 3.7 Sonnet Vision leads Sonar Pro Reasoning by 0.5 points (81.0 versus 80.5).
The price picture favours Claude 3.7 Sonnet Vision. The context picture favours Claude 3.7 Sonnet 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 Claude 3.7 Sonnet Vision for quality-sensitive work, and check whether its price holds at your expected volume before committing.
Choose Claude 3.7 Sonnet Vision if
- You want the higher average benchmark score in this index.
- Unit cost matters and you want the cheaper blended price.
- You need the larger 400,000-token context window.
Choose Sonar Pro Reasoning if
- You need the larger 32,768-token output limit.
- The workload needs multi-step reasoning.
FAQ
Is Claude 3.7 Sonnet Vision better than Sonar Pro Reasoning?
On the index average, Claude 3.7 Sonnet Vision leads Sonar Pro Reasoning by 0.5 points (81.0 versus 80.5). The better choice depends on price, context and your task. Claude 3.7 Sonnet Vision wins 6 benchmarks, Sonar Pro Reasoning wins 6.
Which is cheaper, Claude 3.7 Sonnet Vision or Sonar Pro Reasoning?
Claude 3.7 Sonnet Vision is cheaper on a blended 3:1 basis at about $24.54 per million tokens, versus $28.65 for Sonar Pro Reasoning.
Which has the larger context window?
Claude 3.7 Sonnet Vision has the larger context window at 400,000 tokens. Sonar Pro Reasoning has 128,000 tokens.
Are these models open weights?
Claude 3.7 Sonnet Vision is proprietary; Sonar Pro Reasoning is proprietary.
Which should I choose for production?
If you need a single default, start with Claude 3.7 Sonnet Vision for quality-sensitive work, and check whether its price holds at your expected volume before committing.