Claude 3.7 Sonnet Pro vs Grok 3 Turbo: which model should you choose?
We compared Claude 3.7 Sonnet Pro and Grok 3 Turbo on price, context window and 12 benchmarks. Claude 3.7 Sonnet Pro has the stronger average benchmark score; Grok 3 Turbo is cheaper on a blended 3:1 basis.
Claude 3.7 Sonnet Pro
Claude 3.7 Sonnet Pro is a frontier model from Anthropic. It offers a 128,000-token context window, costs $16.07 per million input tokens and $85.28 per million output tokens, and averages 83.3 across the index's benchmark suite.
- Input
- $16.07 / 1M
- Output
- $85.28 / 1M
- Context
- 128,000
- Avg score
- 83.3
- Open weights
- No
Grok 3 Turbo
Grok 3 Turbo is a multimodal model from xAI. It offers a 128,000-token context window, costs $15.97 per million input tokens and $70.13 per million output tokens, and averages 83.1 across the index's benchmark suite.
- Input
- $15.97 / 1M
- Output
- $70.13 / 1M
- Context
- 128,000
- Avg score
- 83.1
- Open weights
- No
Specification comparison
| Spec | Claude 3.7 Sonnet Pro | Grok 3 Turbo | Edge |
|---|---|---|---|
| Input price / 1M | $16.07 | $15.97 | B |
| Output price / 1M | $85.28 | $70.13 | B |
| Context window | 128,000 | 128,000 | Tie |
| Max output | 8,192 | 65,536 | B |
| Average score | 83.3 | 83.1 | A |
| Arena Elo | 1446.8 | 1438.4 | A |
| Open weights | No | No | Tie |
Benchmark comparison
Claude 3.7 Sonnet Pro wins 5, Grok 3 Turbo wins 5, and 2 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Claude 3.7 Sonnet Pro | Grok 3 Turbo | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 85.7 | 83.7 | 2.0 | Claude 3.7 Sonnet Pro |
| GPQA Diamond | 80.6 | 79.1 | 1.5 | Claude 3.7 Sonnet Pro |
| SWE-bench Verified | 71.4 | 71.4 | 0.0 | Tie |
| HumanEval | 90.0 | 86.8 | 3.2 | Claude 3.7 Sonnet Pro |
| MATH-500 | 89.2 | 85.6 | 3.6 | Claude 3.7 Sonnet Pro |
| AIME 2025 | 81.5 | 83.1 | 1.6 | Grok 3 Turbo |
| LiveCodeBench | 74.1 | 76.4 | 2.3 | Grok 3 Turbo |
| IFEval | 88.5 | 90.7 | 2.2 | Grok 3 Turbo |
| TruthfulQA | 86.0 | 86.0 | 0.0 | Tie |
| HellaSwag | 89.7 | 90.2 | 0.5 | Grok 3 Turbo |
| MMMU | 79.7 | 81.3 | 1.6 | Grok 3 Turbo |
| Arena Elo | 1446.8 | 1438.4 | 8.4 | Claude 3.7 Sonnet Pro |
Price analysis
On a blended 3:1 input-to-output basis, Claude 3.7 Sonnet Pro costs about $33.37 per million tokens and Grok 3 Turbo costs about $29.51. Grok 3 Turbo is roughly 12% cheaper than Claude 3.7 Sonnet Pro. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Both models list a 128,000-token context window. That is enough for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Claude 3.7 Sonnet Pro wins 5, Grok 3 Turbo wins 5, and 2 are tied. On the index average, Claude 3.7 Sonnet Pro leads Grok 3 Turbo by 0.2 points (83.3 versus 83.1).
The price picture favours Grok 3 Turbo. The context picture is effectively a tie. 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 Pro for quality-sensitive work and Grok 3 Turbo 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 Pro if
- You want the higher average benchmark score in this index.
Choose Grok 3 Turbo if
- Unit cost matters and you want the cheaper blended price.
- You need the larger 65,536-token output limit.
FAQ
Is Claude 3.7 Sonnet Pro better than Grok 3 Turbo?
On the index average, Claude 3.7 Sonnet Pro leads Grok 3 Turbo by 0.2 points (83.3 versus 83.1). The better choice depends on price, context and your task. Claude 3.7 Sonnet Pro wins 5 benchmarks, Grok 3 Turbo wins 5.
Which is cheaper, Claude 3.7 Sonnet Pro or Grok 3 Turbo?
Grok 3 Turbo is cheaper on a blended 3:1 basis at about $29.51 per million tokens, versus $33.37 for Claude 3.7 Sonnet Pro.
Which has the larger context window?
Both models list a 128,000-token context window.
Are these models open weights?
Claude 3.7 Sonnet Pro is proprietary; Grok 3 Turbo is proprietary.
Which should I choose for production?
If you need a single default, start with Claude 3.7 Sonnet Pro for quality-sensitive work and Grok 3 Turbo for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.