Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
1-bit Bonsai 1.7B
~39
0/8 categoriesKimi K2.5
71
Winner · 4/8 categories1-bit Bonsai 1.7B· Kimi K2.5
Pick Kimi K2.5 if you want the stronger benchmark profile. 1-bit Bonsai 1.7B only becomes the better choice if you want the cheaper token bill.
Kimi K2.5 is clearly ahead on the aggregate, 71 to 39. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Kimi K2.5's sharpest advantage is in mathematics, where it averages 78.3 against 34.4. The single biggest benchmark swing on the page is GPQA, 20.7% to 87.6%.
Kimi K2.5 is also the more expensive model on tokens at $0.50 input / $2.80 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for 1-bit Bonsai 1.7B. That is roughly Infinityx on output cost alone. Kimi K2.5 gives you the larger context window at 128K, compared with 32K for 1-bit Bonsai 1.7B.
BenchLM keeps the benchmark table and the operator tradeoffs on the same page so a better score does not hide a materially slower, pricier, or smaller-context model.
Runtime metrics show N/A when BenchLM does not have a sourced snapshot for that exact model. The scoring rules and freshness policy are documented on the methodology page.
| Benchmark | 1-bit Bonsai 1.7B | Kimi K2.5 |
|---|---|---|
| Agentic | ||
| Terminal-Bench 2.0 | — | 50.8% |
| BrowseComp | — | 60.6% |
| OSWorld-Verified | — | 63.3% |
| Coding | ||
| HumanEval | — | 99% |
| SWE-bench Verified | — | 76.8% |
| LiveCodeBench | — | 85% |
| SWE-bench Pro | — | 40% |
| SWE-Rebench | — | 58.5% |
| React Native Evals | — | 74.9% |
| Multimodal & Grounded | ||
| MMMU-Pro | — | 78.5% |
| OfficeQA Pro | — | 69% |
| ReasoningKimi K2.5 wins | ||
| MuSR | 45.1% | 72% |
| BBH | — | 81% |
| LongBench v2 | — | 67% |
| MRCRv2 | — | 70% |
| KnowledgeKimi K2.5 wins | ||
| GPQA | 20.7% | 87.6% |
| MMLU | — | 77% |
| SuperGPQA | — | 74% |
| MMLU-Pro | — | 87.1% |
| HLE | — | 11% |
| FrontierScience | — | 67% |
| SimpleQA | — | 74% |
| Instruction FollowingKimi K2.5 wins | ||
| IFEval | 63% | 94% |
| Multilingual | ||
| MGSM | — | 83% |
| MMLU-ProX | — | 78% |
| MathematicsKimi K2.5 wins | ||
| MATH-500 | 34.4% | 82% |
| AIME 2023 | — | 77% |
| AIME 2024 | — | 79% |
| AIME 2025 | — | 78% |
| HMMT Feb 2023 | — | 73% |
| HMMT Feb 2024 | — | 75% |
| HMMT Feb 2025 | — | 74% |
| BRUMO 2025 | — | 76% |
Kimi K2.5 is ahead overall, 71 to 39. The biggest single separator in this matchup is GPQA, where the scores are 20.7% and 87.6%.
Kimi K2.5 has the edge for knowledge tasks in this comparison, averaging 62.8 versus 20.7. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Kimi K2.5 has the edge for math in this comparison, averaging 78.3 versus 34.4. Inside this category, MATH-500 is the benchmark that creates the most daylight between them.
Kimi K2.5 has the edge for reasoning in this comparison, averaging 69.3 versus 45.1. Inside this category, MuSR is the benchmark that creates the most daylight between them.
Kimi K2.5 has the edge for instruction following in this comparison, averaging 94 versus 63. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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