Doubao 1.5 Pro Pro vs Kimi K1.5 Instruct: which model should you choose?
We compared Doubao 1.5 Pro Pro and Kimi K1.5 Instruct on price, context window and 12 benchmarks. Kimi K1.5 Instruct has the stronger average benchmark score; Kimi K1.5 Instruct is cheaper on a blended 3:1 basis.
Doubao 1.5 Pro Pro
Doubao 1.5 Pro Pro is a multimodal model from ByteDance. It offers a 128,000-token context window, costs $14.10 per million input tokens and $54.74 per million output tokens, and averages 80.2 across the index's benchmark suite.
- Input
- $14.10 / 1M
- Output
- $54.74 / 1M
- Context
- 128,000
- Avg score
- 80.2
- Open weights
- No
Kimi K1.5 Instruct
Kimi K1.5 Instruct is a multimodal model from Moonshot AI. It offers a 200,000-token context window, costs $5.15 per million input tokens and $28.20 per million output tokens, and averages 80.5 across the index's benchmark suite.
- Input
- $5.15 / 1M
- Output
- $28.20 / 1M
- Context
- 200,000
- Avg score
- 80.5
- Open weights
- Yes
Specification comparison
| Spec | Doubao 1.5 Pro Pro | Kimi K1.5 Instruct | Edge |
|---|---|---|---|
| Input price / 1M | $14.10 | $5.15 | B |
| Output price / 1M | $54.74 | $28.20 | B |
| Context window | 128,000 | 200,000 | B |
| Max output | 8,192 | 4,096 | A |
| Average score | 80.2 | 80.5 | B |
| Arena Elo | 1443.4 | 1431.8 | A |
| Open weights | No | Yes | B |
Benchmark comparison
Doubao 1.5 Pro Pro wins 7, Kimi K1.5 Instruct wins 5, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | Doubao 1.5 Pro Pro | Kimi K1.5 Instruct | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 80.2 | 83.0 | 2.8 | Kimi K1.5 Instruct |
| GPQA Diamond | 74.5 | 77.4 | 2.9 | Kimi K1.5 Instruct |
| SWE-bench Verified | 71.2 | 67.8 | 3.4 | Doubao 1.5 Pro Pro |
| HumanEval | 84.4 | 84.0 | 0.4 | Doubao 1.5 Pro Pro |
| MATH-500 | 85.4 | 82.6 | 2.8 | Doubao 1.5 Pro Pro |
| AIME 2025 | 77.7 | 80.4 | 2.7 | Kimi K1.5 Instruct |
| LiveCodeBench | 71.6 | 71.1 | 0.5 | Doubao 1.5 Pro Pro |
| IFEval | 87.8 | 86.2 | 1.6 | Doubao 1.5 Pro Pro |
| TruthfulQA | 84.6 | 84.3 | 0.3 | Doubao 1.5 Pro Pro |
| HellaSwag | 87.2 | 90.2 | 3.0 | Kimi K1.5 Instruct |
| MMMU | 78.1 | 78.6 | 0.5 | Kimi K1.5 Instruct |
| Arena Elo | 1443.4 | 1431.8 | 11.6 | Doubao 1.5 Pro Pro |
Price analysis
On a blended 3:1 input-to-output basis, Doubao 1.5 Pro Pro costs about $24.26 per million tokens and Kimi K1.5 Instruct costs about $10.91. Kimi K1.5 Instruct is roughly 55% cheaper than Doubao 1.5 Pro Pro. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
Kimi K1.5 Instruct has the larger context window at 200,000 tokens, compared with 128,000 for Doubao 1.5 Pro Pro. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, Doubao 1.5 Pro Pro wins 7, Kimi K1.5 Instruct wins 5, and 0 are tied. On the index average, Kimi K1.5 Instruct leads Doubao 1.5 Pro Pro by 0.3 points (80.5 versus 80.2).
The price picture favours Kimi K1.5 Instruct. The context picture favours Kimi K1.5 Instruct. 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 Kimi K1.5 Instruct for quality-sensitive work, and check whether its price holds at your expected volume before committing.
Choose Doubao 1.5 Pro Pro if
- You need the larger 8,192-token output limit.
Choose Kimi K1.5 Instruct if
- You want the higher average benchmark score in this index.
- Unit cost matters and you want the cheaper blended price.
- You need the larger 200,000-token context window.
- You need open weights for self-hosting or fine-tuning.
FAQ
Is Doubao 1.5 Pro Pro better than Kimi K1.5 Instruct?
On the index average, Kimi K1.5 Instruct leads Doubao 1.5 Pro Pro by 0.3 points (80.5 versus 80.2). The better choice depends on price, context and your task. Doubao 1.5 Pro Pro wins 7 benchmarks, Kimi K1.5 Instruct wins 5.
Which is cheaper, Doubao 1.5 Pro Pro or Kimi K1.5 Instruct?
Kimi K1.5 Instruct is cheaper on a blended 3:1 basis at about $10.91 per million tokens, versus $24.26 for Doubao 1.5 Pro Pro.
Which has the larger context window?
Kimi K1.5 Instruct has the larger context window at 200,000 tokens. Doubao 1.5 Pro Pro has 128,000 tokens.
Are these models open weights?
Doubao 1.5 Pro Pro is proprietary; Kimi K1.5 Instruct is open weights.
Which should I choose for production?
If you need a single default, start with Kimi K1.5 Instruct for quality-sensitive work, and check whether its price holds at your expected volume before committing.