Kimi K1.5: pricing, context window and benchmarks
Kimi K1.5 is a multimodal model from Moonshot AI. It offers a 128,000-token context window, costs $5.19 per million input tokens and $21.20 per million output tokens, and averages 80.7 across the index's benchmark suite.
Pricing
Kimi K1.5 costs $5.19 per million input tokens and $21.20 per million output tokens. A blended 3:1 input-to-output mix works out to about $9.19 per million tokens. Cached input is listed at $0.62 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $5.19 | per 1M tokens |
| Output | $21.20 | per 1M tokens |
| Cached input | $0.62 | per 1M tokens |
| Blended 3:1 | $9.19 | estimate per 1M tokens |
| 1M in + 1M out | $26.39 | estimate |
Benchmarks
Scores below are modelled estimates on a 0–100 scale. Use them to compare relative position, not as official vendor results.
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 82.7 | 109 | 82th | |
| GPQA Diamond | 74.4 | 155 | 74th | |
| SWE-bench Verified | 68.2 | 141 | 77th | |
| HumanEval | 87.1 | 84 | 86th | |
| MATH-500 | 85.3 | 103 | 83th | |
| AIME 2025 | 80.8 | 77 | 87th | |
| LiveCodeBench | 71.1 | 168 | 72th | |
| IFEval | 87.9 | 104 | 83th | |
| TruthfulQA | 84.7 | 69 | 89th | |
| HellaSwag | 87.2 | 164 | 73th | |
| MMMU | 77.8 | 99 | 84th | |
| Arena Elo | 1432.2 | 117 | 81th |
What Kimi K1.5 is good for
Kimi K1.5 is tuned toward coding work. It is a reasonable candidate for code generation, review, debugging and repository-scale tasks, especially when paired with a retrieval layer. At $5.19 per million input tokens, it sits in the mid-range of the index, and the 128,000-token context window is enough for large files and multi-file diffs.
Strengths
- Large 128,000-token context window for long documents and agent traces.
- Open weights make self-hosting, fine-tuning and data-residency review possible.
- Accepts more than text, including image input where the provider supports it.
- Coding benchmarks are a relative strength within its tier.
Trade-offs
- No standout weakness in the indexed specifications, but real-world behaviour still needs testing.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Claude Haiku 4.5 Pro | Anthropic | 1000000 | $15.07 | 80.8 |
| Kimi K1.5 | Moonshot AI | 128000 | $5.19 | 80.7 |
| ERNIE 4.5 Max | Baidu | 128000 | $14.41 | 80.6 |
| MiniMax-M2 | MiniMax | 200000 | $5.19 | 80.6 |
| ERNIE 4.5 Pro | Baidu | 1000000 | $13.89 | 80.5 |
| Kimi K1.5 Instruct | Moonshot AI | 200000 | $5.15 | 80.5 |
FAQ
How much does Kimi K1.5 cost?
Kimi K1.5 is listed at $5.19 per million input tokens and $21.20 per million output tokens. Cached input is $0.62 per million tokens. A blended 3:1 input-to-output mix is about $9.19 per million tokens.
What is the context window of Kimi K1.5?
Kimi K1.5 has a context window of 128,000 tokens and can emit up to 4,096 output tokens per request in this index.
Is Kimi K1.5 open weights?
Yes. Kimi K1.5 is listed as an open-weight model under a open weights licence.
How does Kimi K1.5 score on benchmarks?
Kimi K1.5 averages 80.7 across the scored benchmarks in this index, ranking #103 of 600 models. Its strongest relative result is Arena Elo at 1432.2.
What is Kimi K1.5 best for?
Kimi K1.5 is tuned toward coding work. It is a reasonable candidate for code generation, review, debugging and repository-scale tasks, especially when paired with a retrieval layer. At $5.19 per million input tokens, it sits in the mid-range of the index, and the 128,000-token context window is enough for large files and multi-file diffs.