Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
1-bit Bonsai 8B
~50
0/8 categoriesGrok 4.1 Fast
72
Winner · 4/8 categories1-bit Bonsai 8B· Grok 4.1 Fast
Pick Grok 4.1 Fast if you want the stronger benchmark profile. 1-bit Bonsai 8B only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Grok 4.1 Fast is clearly ahead on the aggregate, 72 to 50. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4.1 Fast's sharpest advantage is in knowledge, where it averages 70.9 against 30. The single biggest benchmark swing on the page is GPQA, 30% to 92%.
Grok 4.1 Fast gives you the larger context window at 1M, compared with 64K for 1-bit Bonsai 8B.
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 8B | Grok 4.1 Fast |
|---|---|---|
| Agentic | ||
| Terminal-Bench 2.0 | — | 74% |
| BrowseComp | — | 73% |
| OSWorld-Verified | — | 66% |
| Coding | ||
| HumanEval | — | 86% |
| SWE-bench Verified | — | 68% |
| LiveCodeBench | — | 54% |
| SWE-bench Pro | — | 63% |
| Multimodal & Grounded | ||
| MMMU-Pro | — | 91% |
| OfficeQA Pro | — | 83% |
| ReasoningGrok 4.1 Fast wins | ||
| MuSR | 50% | 88% |
| BBH | — | 87% |
| LongBench v2 | — | 87% |
| MRCRv2 | — | 89% |
| KnowledgeGrok 4.1 Fast wins | ||
| GPQA | 30% | 92% |
| MMLU | — | 94% |
| SuperGPQA | — | 90% |
| MMLU-Pro | — | 81% |
| HLE | — | 20% |
| FrontierScience | — | 83% |
| SimpleQA | — | 90% |
| Instruction FollowingGrok 4.1 Fast wins | ||
| IFEval | 79.8% | 90% |
| Multilingual | ||
| MGSM | — | 88% |
| MMLU-ProX | — | 83% |
| MathematicsGrok 4.1 Fast wins | ||
| MATH-500 | 66% | 89% |
| AIME 2023 | — | 96% |
| AIME 2024 | — | 98% |
| AIME 2025 | — | 97% |
| HMMT Feb 2023 | — | 92% |
| HMMT Feb 2024 | — | 94% |
| HMMT Feb 2025 | — | 93% |
| BRUMO 2025 | — | 95% |
Grok 4.1 Fast is ahead overall, 72 to 50. The biggest single separator in this matchup is GPQA, where the scores are 30% and 92%.
Grok 4.1 Fast has the edge for knowledge tasks in this comparison, averaging 70.9 versus 30. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for math in this comparison, averaging 94.3 versus 66. Inside this category, MATH-500 is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for reasoning in this comparison, averaging 87.9 versus 50. Inside this category, MuSR is the benchmark that creates the most daylight between them.
Grok 4.1 Fast has the edge for instruction following in this comparison, averaging 90 versus 79.8. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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