Kimi K1.5 Base: pricing, context window and benchmarks
Kimi K1.5 Base is a multimodal model from Moonshot AI. It offers a 65,536-token context window, costs $4.34 per million input tokens and $15.70 per million output tokens, and averages 77.4 across the index's benchmark suite.
Pricing
Kimi K1.5 Base costs $4.34 per million input tokens and $15.70 per million output tokens. A blended 3:1 input-to-output mix works out to about $7.18 per million tokens. Cached input is listed at $0.60 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $4.34 | per 1M tokens |
| Output | $15.70 | per 1M tokens |
| Cached input | $0.60 | per 1M tokens |
| Blended 3:1 | $7.18 | estimate per 1M tokens |
| 1M in + 1M out | $20.04 | 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 | 78.2 | 237 | 61th | |
| GPQA Diamond | 74.3 | 160 | 73th | |
| SWE-bench Verified | 67.3 | 162 | 73th | |
| HumanEval | 82.2 | 181 | 70th | |
| MATH-500 | 79.9 | 211 | 65th | |
| AIME 2025 | 72.9 | 204 | 66th | |
| LiveCodeBench | 67.0 | 250 | 58th | |
| IFEval | 86.0 | 157 | 74th | |
| TruthfulQA | 81.2 | 149 | 75th | |
| HellaSwag | 85.8 | 223 | 63th | |
| MMMU | 76.3 | 133 | 78th | |
| Arena Elo | 1397.5 | 216 | 64th |
What Kimi K1.5 Base is good for
Kimi K1.5 Base 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 $4.34 per million input tokens, it sits in the mid-range of the index, and the 65,536-token context window is enough for large files and multi-file diffs.
Strengths
- 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 |
|---|---|---|---|---|
| ERNIE 4.0 Pro | Baidu | 200000 | $12.58 | 77.5 |
| Hunyuan-Turbo Reasoning | Tencent | 128000 | $11.89 | 77.5 |
| Hunyuan-Turbo Turbo | Tencent | 65536 | $11.60 | 77.4 |
| Kimi K1.5 Base | Moonshot AI | 65536 | $4.34 | 77.4 |
| Qwen3 Base | Alibaba Cloud | 65536 | $4.33 | 77.4 |
| Reka Core | Reka AI | 32768 | $12.17 | 77.4 |
FAQ
How much does Kimi K1.5 Base cost?
Kimi K1.5 Base is listed at $4.34 per million input tokens and $15.70 per million output tokens. Cached input is $0.60 per million tokens. A blended 3:1 input-to-output mix is about $7.18 per million tokens.
What is the context window of Kimi K1.5 Base?
Kimi K1.5 Base has a context window of 65,536 tokens and can emit up to 16,384 output tokens per request in this index.
Is Kimi K1.5 Base open weights?
Yes. Kimi K1.5 Base is listed as an open-weight model under a open weights licence.
How does Kimi K1.5 Base score on benchmarks?
Kimi K1.5 Base averages 77.4 across the scored benchmarks in this index, ranking #188 of 600 models. Its strongest relative result is Arena Elo at 1397.5.
What is Kimi K1.5 Base best for?
Kimi K1.5 Base 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 $4.34 per million input tokens, it sits in the mid-range of the index, and the 65,536-token context window is enough for large files and multi-file diffs.