Claude Haiku 4.5 vs Sonar Pro Turbo: which model should you choose?
We compared Claude Haiku 4.5 and Sonar Pro Turbo on price, context window and 12 benchmarks. Claude Haiku 4.5 has the stronger average benchmark score; Sonar Pro Turbo is cheaper on a blended 3:1 basis.
Claude Haiku 4.5
Claude Haiku 4.5 is a multimodal model from Anthropic. It offers a 1,000,000-token context window, costs $13.86 per million input tokens and $74.67 per million output tokens, and averages 79.4 across the index's benchmark suite.
- Input
- $13.86 / 1M
- Output
- $74.67 / 1M
- Context
- 1,000,000
- Avg score
- 79.4
- Open weights
- No
Sonar Pro Turbo
Sonar Pro Turbo is a multimodal model from Perplexity. It offers a 128,000-token context window, costs $13.55 per million input tokens and $57.97 per million output tokens, and averages 79.0 across the index's benchmark suite.
- Input
- $13.55 / 1M
- Output
- $57.97 / 1M
- Context
- 128,000
- Avg score
- 79.0
- Open weights
- No
Specification comparison
| Spec | Claude Haiku 4.5 | Sonar Pro Turbo | Edge |
|---|---|---|---|
| Input price / 1M | $13.86 | $13.55 | B |
| Output price / 1M | $74.67 | $57.97 | B |
| Context window | 1,000,000 | 128,000 | A |
| Max output | 128,000 | 4,096 | A |
| Average score | 79.4 | 79.0 | A |
| Arena Elo | 1421.8 | 1434.8 | B |
| Open weights | No | No | Tie |
Benchmark comparison
Claude Haiku 4.5 wins 6, Sonar Pro Turbo wins 5, and 1 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Claude Haiku 4.5 | Sonar Pro Turbo | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 84.1 | 81.6 | 2.5 | Claude Haiku 4.5 |
| GPQA Diamond | 74.1 | 74.2 | 0.1 | Sonar Pro Turbo |
| SWE-bench Verified | 69.2 | 66.3 | 2.9 | Claude Haiku 4.5 |
| HumanEval | 84.7 | 84.7 | 0.0 | Tie |
| MATH-500 | 81.4 | 84.1 | 2.7 | Sonar Pro Turbo |
| AIME 2025 | 76.5 | 73.9 | 2.6 | Claude Haiku 4.5 |
| LiveCodeBench | 71.6 | 73.7 | 2.1 | Sonar Pro Turbo |
| IFEval | 85.2 | 84.9 | 0.3 | Claude Haiku 4.5 |
| TruthfulQA | 79.6 | 81.2 | 1.6 | Sonar Pro Turbo |
| HellaSwag | 89.6 | 89.3 | 0.3 | Claude Haiku 4.5 |
| MMMU | 77.6 | 75.2 | 2.4 | Claude Haiku 4.5 |
| Arena Elo | 1421.8 | 1434.8 | 13.0 | Sonar Pro Turbo |
Price analysis
On a blended 3:1 input-to-output basis, Claude Haiku 4.5 costs about $29.06 per million tokens and Sonar Pro Turbo costs about $24.66. Sonar Pro Turbo is roughly 15% cheaper than Claude Haiku 4.5. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Claude Haiku 4.5 has the larger context window at 1,000,000 tokens, compared with 128,000 for Sonar Pro Turbo. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Claude Haiku 4.5 wins 6, Sonar Pro Turbo wins 5, and 1 are tied. On the index average, Claude Haiku 4.5 leads Sonar Pro Turbo by 0.4 points (79.4 versus 79.0).
The price picture favours Sonar Pro Turbo. The context picture favours Claude Haiku 4.5. 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 Haiku 4.5 for quality-sensitive work and Sonar Pro Turbo for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.
Choose Claude Haiku 4.5 if
- You want the higher average benchmark score in this index.
- You need the larger 1,000,000-token context window.
- You need the larger 128,000-token output limit.
Choose Sonar Pro Turbo if
- Unit cost matters and you want the cheaper blended price.
FAQ
Is Claude Haiku 4.5 better than Sonar Pro Turbo?
On the index average, Claude Haiku 4.5 leads Sonar Pro Turbo by 0.4 points (79.4 versus 79.0). The better choice depends on price, context and your task. Claude Haiku 4.5 wins 6 benchmarks, Sonar Pro Turbo wins 5.
Which is cheaper, Claude Haiku 4.5 or Sonar Pro Turbo?
Sonar Pro Turbo is cheaper on a blended 3:1 basis at about $24.66 per million tokens, versus $29.06 for Claude Haiku 4.5.
Which has the larger context window?
Claude Haiku 4.5 has the larger context window at 1,000,000 tokens. Sonar Pro Turbo has 128,000 tokens.
Are these models open weights?
Claude Haiku 4.5 is proprietary; Sonar Pro Turbo is proprietary.
Which should I choose for production?
If you need a single default, start with Claude Haiku 4.5 for quality-sensitive work and Sonar Pro Turbo for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.