Doubao 1.5 Pro Reasoning vs Gemini 2.5 Pro Vision: which model should you choose?
We compared Doubao 1.5 Pro Reasoning and Gemini 2.5 Pro Vision on price, context window and 12 benchmarks. Gemini 2.5 Pro Vision has the stronger average benchmark score; Doubao 1.5 Pro Reasoning is cheaper on a blended 3:1 basis.
Doubao 1.5 Pro Reasoning
Doubao 1.5 Pro Reasoning is a multimodal model from ByteDance. It offers a 128,000-token context window, costs $14.56 per million input tokens and $58.10 per million output tokens, and averages 81.6 across the index's benchmark suite.
- Input
- $14.56 / 1M
- Output
- $58.10 / 1M
- Context
- 128,000
- Avg score
- 81.6
- Open weights
- No
Gemini 2.5 Pro Vision
Gemini 2.5 Pro Vision is a multimodal model from Google DeepMind. It offers a 200,000-token context window, costs $14.91 per million input tokens and $71.00 per million output tokens, and averages 82.0 across the index's benchmark suite.
- Input
- $14.91 / 1M
- Output
- $71.00 / 1M
- Context
- 200,000
- Avg score
- 82.0
- Open weights
- No
Specification comparison
| Spec | Doubao 1.5 Pro Reasoning | Gemini 2.5 Pro Vision | Edge |
|---|---|---|---|
| Input price / 1M | $14.56 | $14.91 | A |
| Output price / 1M | $58.10 | $71.00 | A |
| Context window | 128,000 | 200,000 | B |
| Max output | 16,384 | 4,096 | A |
| Average score | 81.6 | 82.0 | B |
| Arena Elo | 1439.2 | 1451.3 | B |
| Open weights | No | No | Tie |
Benchmark comparison
Doubao 1.5 Pro Reasoning wins 4, Gemini 2.5 Pro Vision wins 8, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Doubao 1.5 Pro Reasoning | Gemini 2.5 Pro Vision | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 81.8 | 83.9 | 2.1 | Gemini 2.5 Pro Vision |
| GPQA Diamond | 78.1 | 78.0 | 0.1 | Doubao 1.5 Pro Reasoning |
| SWE-bench Verified | 69.7 | 72.4 | 2.7 | Gemini 2.5 Pro Vision |
| HumanEval | 87.4 | 85.8 | 1.6 | Doubao 1.5 Pro Reasoning |
| MATH-500 | 85.1 | 82.9 | 2.2 | Doubao 1.5 Pro Reasoning |
| AIME 2025 | 81.4 | 80.0 | 1.4 | Doubao 1.5 Pro Reasoning |
| LiveCodeBench | 73.9 | 76.0 | 2.1 | Gemini 2.5 Pro Vision |
| IFEval | 88.7 | 90.2 | 1.5 | Gemini 2.5 Pro Vision |
| TruthfulQA | 82.3 | 84.1 | 1.8 | Gemini 2.5 Pro Vision |
| HellaSwag | 90.7 | 90.8 | 0.1 | Gemini 2.5 Pro Vision |
| MMMU | 78.1 | 78.2 | 0.1 | Gemini 2.5 Pro Vision |
| Arena Elo | 1439.2 | 1451.3 | 12.1 | Gemini 2.5 Pro Vision |
Price analysis
On a blended 3:1 input-to-output basis, Doubao 1.5 Pro Reasoning costs about $25.45 per million tokens and Gemini 2.5 Pro Vision costs about $28.93. Doubao 1.5 Pro Reasoning is roughly 12% cheaper than Gemini 2.5 Pro Vision. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Gemini 2.5 Pro Vision has the larger context window at 200,000 tokens, compared with 128,000 for Doubao 1.5 Pro Reasoning. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Doubao 1.5 Pro Reasoning wins 4, Gemini 2.5 Pro Vision wins 8, and 0 are tied. On the index average, Gemini 2.5 Pro Vision leads Doubao 1.5 Pro Reasoning by 0.4 points (82.0 versus 81.6).
The price picture favours Doubao 1.5 Pro Reasoning. The context picture favours Gemini 2.5 Pro 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 2.5 Pro Vision for quality-sensitive work and Doubao 1.5 Pro Reasoning for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.
Choose Doubao 1.5 Pro Reasoning if
- Unit cost matters and you want the cheaper blended price.
- You need the larger 16,384-token output limit.
- The workload needs multi-step reasoning.
Choose Gemini 2.5 Pro Vision if
- You want the higher average benchmark score in this index.
- You need the larger 200,000-token context window.
FAQ
Is Doubao 1.5 Pro Reasoning better than Gemini 2.5 Pro Vision?
On the index average, Gemini 2.5 Pro Vision leads Doubao 1.5 Pro Reasoning by 0.4 points (82.0 versus 81.6). The better choice depends on price, context and your task. Doubao 1.5 Pro Reasoning wins 4 benchmarks, Gemini 2.5 Pro Vision wins 8.
Which is cheaper, Doubao 1.5 Pro Reasoning or Gemini 2.5 Pro Vision?
Doubao 1.5 Pro Reasoning is cheaper on a blended 3:1 basis at about $25.45 per million tokens, versus $28.93 for Gemini 2.5 Pro Vision.
Which has the larger context window?
Gemini 2.5 Pro Vision has the larger context window at 200,000 tokens. Doubao 1.5 Pro Reasoning has 128,000 tokens.
Are these models open weights?
Doubao 1.5 Pro Reasoning is proprietary; Gemini 2.5 Pro Vision is proprietary.
Which should I choose for production?
If you need a single default, start with Gemini 2.5 Pro Vision for quality-sensitive work and Doubao 1.5 Pro Reasoning for high-volume, well-scoped tasks. Run both on a sample of your own traffic before locking in a choice.