Pyyan / Compare / Muse Spark 1.3 vs GPT-5.6 Sol
Muse Spark 1.3 vs GPT-5.6 Sol
2 of 5Language Models · verified 5 Sept 2026
Muse Spark 1.3Metacurrent
GPT-5.6 SolOpenAIcurrent| Specification | Muse Spark 1.3 | GPT-5.6 Sol |
|---|---|---|
| Summary | A quarter fewer tokens than 1.2 for the same work, which is the figure on the bill. | Flagship tier of the GPT-5.6 family. |
| Context | 1M | 1M+ |
| Input ($/Mtok) | $1.25 | — |
| Output ($/Mtok) | $4.25 | — |
| Licence | Proprietary | Proprietary |
| Max output | Not published | — |
| Parameters | Not published | — |
| Released | 2 Sep 2026 | 9 Jul 2026 |
| Model ID | muse-spark-1.3 | — |
| Category | Language Models | Language Models |
| Official | — | OpenAI ↗ |
Highlighted rows are where these differ.
Muse Spark 1.3
- About 20% fewer tool calls and 25% fewer tokens than 1.2 to reach the same result
- 75.4 on DeepSWE v1.1 and 98.5 on MRCR long context between 256K and 512K
- A Contributor tier costs $0.10 in and $0.20 out for the same model, in exchange for letting Meta train on your prompts
Best for long running agentic coding.
GPT-5.6 Sol
- Three tiers: Sol, Terra, Luna
- Adjustable reasoning effort from none to max
- Broad rollout began 9 July 2026
Best for all-round work.