0 vs 3 benchmarks won
Anthropic Claude Haiku 4.5 | Meta Muse Spark | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Meta |
| Release date | Oct 15 2025 | Apr 8 2026 |
| Model type | — | — |
| Open source | No | No |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
Science reasoning GPQA Diamond | 73% | 89.5% |
Software engineering SWE-Bench Verified | 73.3% | 77.4% |
Multimodal understanding MMMU | — | 80.4% |
| Timeline | ||
| Release gap | Claude Haiku 4.5 shipped 175 days before Muse Spark | |
Muse Spark leads Claude Haiku 4.5 on 3 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude Haiku 4.5 shipped 175 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 GPQA Diamond, Muse Spark scores 89.5%, 16.5 points above Claude Haiku 4.5 at 73%. On SWE-Bench Verified, Muse Spark scores 77.4%, 4.1 points above Claude Haiku 4.5 at 73.3%.