2 vs 1 benchmarks won
Meta Muse Spark | OpenAI GPT-5.4 | |
|---|---|---|
| Overview | ||
| Company | Meta | OpenAI |
| Release date | Apr 8 2026 | Mar 5 2026 |
| Model type | — | — |
| Open source | No | No |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
Science reasoning GPQA Diamond | 89.5% | 92.8% |
Software engineering SWE-Bench Verified | 77.4% | — |
Multimodal understanding MMMU | 80.4% | — |
| Timeline | ||
| Release gap | GPT-5.4 shipped 34 days before Muse Spark | |
Muse Spark leads GPT-5.4 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). GPT-5.4 shipped 34 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, GPT-5.4 scores 92.8%, 3.3 points above Muse Spark at 89.5%.