Muse Spark 1.3 vs GPT-5.6 Sol
Muse Spark 1.3 (Meta) and GPT-5.6 Sol (OpenAI) compared on price, context window, speed and independent benchmarks. Muse Spark 1.3 both scores higher on the Artificial Analysis Intelligence Index (48.1 vs 47) and is cheaper on a blended basis — 4.0× less than GPT-5.6 Sol.
| Muse Spark 1.3 | GPT-5.6 Sol | |
|---|---|---|
| Provider | Meta | OpenAI |
| Input $/1M | $1.25 | $4.00 |
| Output $/1M | $4.25 | $20.0 |
| Blended $/1M (3:1) | $2.00 | $8.00 |
| Cached input $/1M | $0.15 | $0.40 |
| Context window | 1.0M | 1.1M |
| Knowledge cutoff | — | 2026-02 |
| License | proprietary | proprietary |
| Speed (tok/s) | 252 | 58 |
| Artificial Analysis Intelligence Index | 48.1 | 47 |
| LMArena Elo | 1490 | 1455 |
| GPQA Diamond | 93.5% | 94.1% |
| Humanity's Last Exam | 48.7% | 49.5% |