Meta Muse Spark vs xAI Grok 4 — side-by-side specs.
Meta Muse Spark | xAI Grok 4 | |
|---|---|---|
| Overview | ||
| Company | Meta | xAI |
| Release date | Apr 8 2026 | Jul 9 2025 |
| 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. | 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. | 89.5% | — |
Multimodal MMMUTests the AI on understanding images and text together across many college subjects. Higher is better. | 80.4% | — |
| Timeline | ||
| Release gap | Grok 4 shipped 273 days before Muse Spark | |
Muse Spark and Grok 4 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok 4 shipped 273 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.
Direct benchmark comparisons are unavailable — Muse Spark and Grok 4 don't publish scores on any of the same benchmarks.