Meta: Muse Spark 1.1 vs OpenAI: GPT-5.6 Luna
OpenAI: GPT-5.6 Luna wins on more metrics (8 of 9), but the right pick depends on what you optimize for — see the breakdown below.
| Metric | Meta: Muse Spark 1.1 | OpenAI: GPT-5.6 Luna |
|---|---|---|
| Intelligence Index | 50.6 | 51.2✓ |
| Coding Index | 71.3 | 71.4✓ |
| GPQA Diamond | 90% | 91%✓ |
| Design Arena Elo | — | 1271✓ |
| Speed (tokens/sec) | — | 135✓ |
| Latency | — | 2.0s✓ |
| Input price /M | $1.25 | $1.00✓ |
| Output price /M | $4.25✓ | $6.00 |
| Context window | 1.0M | 1.1M✓ |
| Capabilities | ReasoningToolsJSONVisionAudio | ReasoningToolsJSONVision |