Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Claude Opus 4.5
78
Winner · 2/8 categoriesLFM2.5-350M
~39
0/8 categoriesClaude Opus 4.5· LFM2.5-350M
Pick Claude Opus 4.5 if you want the stronger benchmark profile. LFM2.5-350M only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Claude Opus 4.5 is clearly ahead on the aggregate, 78 to 39. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Opus 4.5's sharpest advantage is in knowledge, where it averages 71.7 against 23.8. The single biggest benchmark swing on the page is MMLU-Pro, 81% to 20.0%.
Claude Opus 4.5 gives you the larger context window at 200K, compared with 32K for LFM2.5-350M.
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 | Claude Opus 4.5 | LFM2.5-350M |
|---|---|---|
| Agentic | ||
| Terminal-Bench 2.0 | 59.3% | — |
| BrowseComp | 73% | — |
| OSWorld-Verified | 68% | — |
| Coding | ||
| HumanEval | 91% | — |
| SWE-bench Verified | 80.9% | — |
| LiveCodeBench | 57% | — |
| SWE-bench Pro | 62% | — |
| Multimodal & Grounded | ||
| MMMU-Pro | 94% | — |
| OfficeQA Pro | 87% | — |
| Reasoning | ||
| MuSR | 93% | — |
| BBH | 87% | — |
| LongBench v2 | 82% | — |
| MRCRv2 | 81% | — |
| ARC-AGI-2 | 37.6% | — |
| KnowledgeClaude Opus 4.5 wins | ||
| MMLU | 90.8% | — |
| GPQA | 87% | 30.6% |
| SuperGPQA | 95% | — |
| MMLU-Pro | 81% | 20.0% |
| HLE | 20% | — |
| FrontierScience | 84% | — |
| SimpleQA | 95% | — |
| Instruction FollowingClaude Opus 4.5 wins | ||
| IFEval | 90% | 77.0% |
| Multilingual | ||
| MGSM | 90% | — |
| MMLU-ProX | 84% | — |
| Mathematics | ||
| AIME 2023 | 99% | — |
| AIME 2024 | 99% | — |
| AIME 2025 | 98% | — |
| HMMT Feb 2023 | 95% | — |
| HMMT Feb 2024 | 97% | — |
| HMMT Feb 2025 | 96% | — |
| BRUMO 2025 | 96% | — |
| MATH-500 | 89% | — |
Claude Opus 4.5 is ahead overall, 78 to 39. The biggest single separator in this matchup is MMLU-Pro, where the scores are 81% and 20.0%.
Claude Opus 4.5 has the edge for knowledge tasks in this comparison, averaging 71.7 versus 23.8. Inside this category, MMLU-Pro is the benchmark that creates the most daylight between them.
Claude Opus 4.5 has the edge for instruction following in this comparison, averaging 90 versus 77. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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