Gemini 2.5 Pro Reasoning vs Gemini 2.5 Pro Turbo: which model should you choose?
We compared Gemini 2.5 Pro Reasoning and Gemini 2.5 Pro Turbo on price, context window and 12 benchmarks. Gemini 2.5 Pro Turbo has the stronger average benchmark score; Gemini 2.5 Pro Reasoning is cheaper on a blended 3:1 basis.
Gemini 2.5 Pro Reasoning
Gemini 2.5 Pro Reasoning is a frontier model from Google DeepMind. It offers a 128,000-token context window, costs $16.81 per million input tokens and $67.95 per million output tokens, and averages 83.8 across the index's benchmark suite.
- Input
- $16.81 / 1M
- Output
- $67.95 / 1M
- Context
- 128,000
- Avg score
- 83.8
- Open weights
- No
Gemini 2.5 Pro Turbo
Gemini 2.5 Pro Turbo is a frontier model from Google DeepMind. It offers a 1,000,000-token context window, costs $16.32 per million input tokens and $72.61 per million output tokens, and averages 83.9 across the index's benchmark suite.
- Input
- $16.32 / 1M
- Output
- $72.61 / 1M
- Context
- 1,000,000
- Avg score
- 83.9
- Open weights
- No
Specification comparison
| Spec | Gemini 2.5 Pro Reasoning | Gemini 2.5 Pro Turbo | Edge |
|---|---|---|---|
| Input price / 1M | $16.81 | $16.32 | B |
| Output price / 1M | $67.95 | $72.61 | A |
| Context window | 128,000 | 1,000,000 | B |
| Max output | 4,096 | 128,000 | B |
| Average score | 83.8 | 83.9 | B |
| Arena Elo | 1472.1 | 1464.0 | A |
| Open weights | No | No | Tie |
Benchmark comparison
Gemini 2.5 Pro Reasoning wins 6, Gemini 2.5 Pro Turbo wins 6, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Gemini 2.5 Pro Reasoning | Gemini 2.5 Pro Turbo | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 86.8 | 82.9 | 3.9 | Gemini 2.5 Pro Reasoning |
| GPQA Diamond | 80.0 | 81.7 | 1.7 | Gemini 2.5 Pro Turbo |
| SWE-bench Verified | 71.2 | 71.4 | 0.2 | Gemini 2.5 Pro Turbo |
| HumanEval | 86.7 | 88.1 | 1.4 | Gemini 2.5 Pro Turbo |
| MATH-500 | 87.9 | 90.6 | 2.7 | Gemini 2.5 Pro Turbo |
| AIME 2025 | 84.2 | 83.7 | 0.5 | Gemini 2.5 Pro Reasoning |
| LiveCodeBench | 74.8 | 78.6 | 3.8 | Gemini 2.5 Pro Turbo |
| IFEval | 90.8 | 90.7 | 0.1 | Gemini 2.5 Pro Reasoning |
| TruthfulQA | 84.0 | 85.9 | 1.9 | Gemini 2.5 Pro Turbo |
| HellaSwag | 92.1 | 91.2 | 0.9 | Gemini 2.5 Pro Reasoning |
| MMMU | 82.8 | 78.4 | 4.4 | Gemini 2.5 Pro Reasoning |
| Arena Elo | 1472.1 | 1464.0 | 8.1 | Gemini 2.5 Pro Reasoning |
Price analysis
On a blended 3:1 input-to-output basis, Gemini 2.5 Pro Reasoning costs about $29.59 per million tokens and Gemini 2.5 Pro Turbo costs about $30.39. Gemini 2.5 Pro Reasoning is roughly 3% cheaper than Gemini 2.5 Pro Turbo. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Gemini 2.5 Pro Turbo has the larger context window at 1,000,000 tokens, compared with 128,000 for Gemini 2.5 Pro Reasoning. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Gemini 2.5 Pro Reasoning wins 6, Gemini 2.5 Pro Turbo wins 6, and 0 are tied. On the index average, Gemini 2.5 Pro Turbo leads Gemini 2.5 Pro Reasoning by 0.1 points (83.9 versus 83.8).
The price picture favours Gemini 2.5 Pro Reasoning. The context picture favours Gemini 2.5 Pro Turbo. 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 2.5 Pro Turbo for quality-sensitive work and Gemini 2.5 Pro Reasoning for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.
Choose Gemini 2.5 Pro Reasoning if
- Unit cost matters and you want the cheaper blended price.
Choose Gemini 2.5 Pro Turbo 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.
FAQ
Is Gemini 2.5 Pro Reasoning better than Gemini 2.5 Pro Turbo?
On the index average, Gemini 2.5 Pro Turbo leads Gemini 2.5 Pro Reasoning by 0.1 points (83.9 versus 83.8). The better choice depends on price, context and your task. Gemini 2.5 Pro Reasoning wins 6 benchmarks, Gemini 2.5 Pro Turbo wins 6.
Which is cheaper, Gemini 2.5 Pro Reasoning or Gemini 2.5 Pro Turbo?
Gemini 2.5 Pro Reasoning is cheaper on a blended 3:1 basis at about $29.59 per million tokens, versus $30.39 for Gemini 2.5 Pro Turbo.
Which has the larger context window?
Gemini 2.5 Pro Turbo has the larger context window at 1,000,000 tokens. Gemini 2.5 Pro Reasoning has 128,000 tokens.
Are these models open weights?
Gemini 2.5 Pro Reasoning is proprietary; Gemini 2.5 Pro Turbo is proprietary.
Which should I choose for production?
If you need a single default, start with Gemini 2.5 Pro Turbo for quality-sensitive work and Gemini 2.5 Pro Reasoning for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.