Muse Spark Open vs Step 5 Preview
Specs, per-token pricing, and live benchmark scores — refreshed daily from our benchmark database.
Specs & pricing
| Muse Spark Open | Step 5 Preview | |
|---|---|---|
| Company | Meta AI | StepFun |
| Released | Oct 2026 | Oct 2026 |
| Context window | 1.0M | 1.0M |
| Input /1M tokens | $1.25 | $1 |
| Output /1M tokens | $4.25 | $2.7 |
| Open weights | No | Yes |
Benchmarks
| Benchmark | Muse Spark Open | Step 5 Preview |
|---|---|---|
| Speed (tok/s) | — | 53 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.