Claude Opus 5 vs Muse Spark 1.3
Claude Opus 5 (Anthropic) and Muse Spark 1.3 (Meta) compared on price, context window, speed and independent benchmarks. Claude Opus 5 scores higher on the Artificial Analysis Intelligence Index (50.8 vs 48.1), while Muse Spark 1.3 is 5.0× cheaper on a blended basis. Pick Claude Opus 5 for the hardest tasks and Muse Spark 1.3 when cost dominates.
| Claude Opus 5 | Muse Spark 1.3 | |
|---|---|---|
| Provider | Anthropic | Meta |
| Input $/1M | $5.00 | $1.25 |
| Output $/1M | $25.0 | $4.25 |
| Blended $/1M (3:1) | $10.0 | $2.00 |
| Cached input $/1M | $0.50 | $0.15 |
| Context window | 1M | 1.0M |
| Knowledge cutoff | 2026-05 | — |
| License | proprietary | proprietary |
| Speed (tok/s) | 57 | 252 |
| Artificial Analysis Intelligence Index | 50.8 | 48.1 |
| LMArena Elo | 1505 | 1490 |
| GPQA Diamond | 93.2% | 93.5% |
| SWE-bench Verified | 97% | — |
| LiveCodeBench | 74.6% | — |
| MMLU-Pro | 91.6% | — |
| Humanity's Last Exam | 54.9% | 48.7% |