Grok 4.3 vs Muse Spark 1.2
Specs, per-token pricing, and live benchmark scores — refreshed daily from our benchmark database.
Specs & pricing
| Grok 4.3 | Muse Spark 1.2 | |
|---|---|---|
| Company | xAI | Meta AI |
| Released | Jul 2026 | Aug 2026 |
| Context window | 1.0M | 1.0M |
| Input /1M tokens | $1.25 | $1.25 |
| Output /1M tokens | $2.5 | $4.25 |
| Open weights | No | No |
Benchmarks
| Benchmark | Grok 4.3 | Muse Spark 1.2 |
|---|---|---|
| Arena Elo | 1442 Elo | — |
| GPQA | 90.1% | — |
| Hallucination Rate (lower is better) | 74.5% | — |
| Speed (tok/s) | 113 tok/s | — |
Scores come from published leaderboards and official model cards (sources listed on the benchmarks page) and refresh daily. Pricing via vendor pages and OpenRouter.