1 vs 1 benchmarks won
Anthropic Claude Opus 4.5 | Meta Muse Spark | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Meta |
| Release date | Nov 24 2025 | Apr 8 2026 |
| Model type | — | — |
| Open source | No | No |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 80.9%Best | 77.4% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 87% | 89.5%Best |
Multimodal MMMUTests the AI on understanding images and text together across many college subjects. Higher is better. | — | 80.4% |
| Timeline | ||
| Release gap | Claude Opus 4.5 shipped 135 days before Muse Spark | |
Claude Opus 4.5 and Muse Spark are evenly matched across the 2 benchmarks they both report (SWE-Bench Verified, GPQA Diamond). Claude Opus 4.5 shipped 135 days before Muse Spark, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On SWE-Bench Verified, Claude Opus 4.5 leads at 80.9% vs Muse Spark at 77.4%. On GPQA Diamond, Muse Spark leads at 89.5% vs Claude Opus 4.5 at 87%.