GPT-5.6 Sol vs Muse Spark 1.3 Contributor
GPT-5.6 Sol vs Muse Spark 1.3 Contributor: which AI model is cheaper, has the larger context window and more capabilities? Side-by-side comparison updated daily.
Quick verdict
- Muse Spark 1.3 Contributor is 32× cheaper than GPT-5.6 Sol for the same mix of input and output tokens.
- GPT-5.6 Sol has the larger context window (1.1M), useful for long documents and big codebases.
- Muse Spark 1.3 Contributor is the more recent release (Sep 2, 2026).
- Choose Muse Spark 1.3 Contributor if cost matters most; choose GPT-5.6 Sol if you need its specific strengths above. For the best results, test both on your own prompts.
| GPT-5.6 Sol | Muse Spark 1.3 Contributor | |
|---|---|---|
| Company | OpenAI | Meta |
| Released | Jul 9, 2026 | Sep 2, 2026 ● |
| Overall index | 162.0 | — |
| GPQA Diamond | 93.5% | — |
| AIME math | 100% | — |
| FrontierMath | 89.1% | — |
| SimpleQA Verified | 69.7% | — |
| Input (per 1M tokens) | $2 | $0.10 ● |
| Output (per 1M tokens) | $10 | $0.20 ● |
| Cost for 1M input + 1M output tokens | $12.00 | $0.30 ● |
| Providers | 7 ● | 1 |
| Context | 1.1M ● | 1M |
| Max output | 128K | 944K ● |
| Inputs | Files, Image, Text | Text, Image, Video, Files ● |
| Outputs | Text | Text |
| Reasoning | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Open weights | — | — |