Doubao 1.5 Pro Reasoning vs Gemini 3 Flash Vision: which model should you choose?
We compared Doubao 1.5 Pro Reasoning and Gemini 3 Flash Vision on price, context window and 12 benchmarks. Gemini 3 Flash 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 3 Flash Vision
Gemini 3 Flash Vision is a multimodal model from Google DeepMind. It offers a 400,000-token context window, costs $15.06 per million input tokens and $82.14 per million output tokens, and averages 81.9 across the index's benchmark suite.
- Input
- $15.06 / 1M
- Output
- $82.14 / 1M
- Context
- 400,000
- Avg score
- 81.9
- Open weights
- No
Specification comparison
| Spec | Doubao 1.5 Pro Reasoning | Gemini 3 Flash Vision | Edge |
|---|---|---|---|
| Input price / 1M | $14.56 | $15.06 | A |
| Output price / 1M | $58.10 | $82.14 | A |
| Context window | 128,000 | 400,000 | B |
| Max output | 16,384 | 32,768 | B |
| Average score | 81.6 | 81.9 | B |
| Arena Elo | 1439.2 | 1430.3 | A |
| Open weights | No | No | Tie |
Benchmark comparison
Doubao 1.5 Pro Reasoning wins 5, Gemini 3 Flash Vision wins 6, and 1 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Doubao 1.5 Pro Reasoning | Gemini 3 Flash Vision | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 81.8 | 81.8 | 0.0 | Tie |
| GPQA Diamond | 78.1 | 75.7 | 2.4 | Doubao 1.5 Pro Reasoning |
| SWE-bench Verified | 69.7 | 71.4 | 1.7 | Gemini 3 Flash Vision |
| HumanEval | 87.4 | 84.5 | 2.9 | Doubao 1.5 Pro Reasoning |
| MATH-500 | 85.1 | 87.5 | 2.4 | Gemini 3 Flash Vision |
| AIME 2025 | 81.4 | 82.4 | 1.0 | Gemini 3 Flash Vision |
| LiveCodeBench | 73.9 | 73.2 | 0.7 | Doubao 1.5 Pro Reasoning |
| IFEval | 88.7 | 86.9 | 1.8 | Doubao 1.5 Pro Reasoning |
| TruthfulQA | 82.3 | 85.5 | 3.2 | Gemini 3 Flash Vision |
| HellaSwag | 90.7 | 91.5 | 0.8 | Gemini 3 Flash Vision |
| MMMU | 78.1 | 80.3 | 2.2 | Gemini 3 Flash Vision |
| Arena Elo | 1439.2 | 1430.3 | 8.9 | Doubao 1.5 Pro Reasoning |
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 3 Flash Vision costs about $31.83. Doubao 1.5 Pro Reasoning is roughly 20% cheaper than Gemini 3 Flash Vision. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Gemini 3 Flash Vision has the larger context window at 400,000 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 5, Gemini 3 Flash Vision wins 6, and 1 are tied. On the index average, Gemini 3 Flash Vision leads Doubao 1.5 Pro Reasoning by 0.3 points (81.9 versus 81.6).
The price picture favours Doubao 1.5 Pro Reasoning. The context picture favours Gemini 3 Flash 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 3 Flash 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.
- The workload needs multi-step reasoning.
Choose Gemini 3 Flash Vision if
- You want the higher average benchmark score in this index.
- You need the larger 400,000-token context window.
- You need the larger 32,768-token output limit.
FAQ
Is Doubao 1.5 Pro Reasoning better than Gemini 3 Flash Vision?
On the index average, Gemini 3 Flash Vision leads Doubao 1.5 Pro Reasoning by 0.3 points (81.9 versus 81.6). The better choice depends on price, context and your task. Doubao 1.5 Pro Reasoning wins 5 benchmarks, Gemini 3 Flash Vision wins 6.
Which is cheaper, Doubao 1.5 Pro Reasoning or Gemini 3 Flash Vision?
Doubao 1.5 Pro Reasoning is cheaper on a blended 3:1 basis at about $25.45 per million tokens, versus $31.83 for Gemini 3 Flash Vision.
Which has the larger context window?
Gemini 3 Flash Vision has the larger context window at 400,000 tokens. Doubao 1.5 Pro Reasoning has 128,000 tokens.
Are these models open weights?
Doubao 1.5 Pro Reasoning is proprietary; Gemini 3 Flash Vision is proprietary.
Which should I choose for production?
If you need a single default, start with Gemini 3 Flash 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.