gpt-oss-120b vs Muse Spark
gpt-oss-120b (OpenAI) and Muse Spark (Meta AI) compared on benchmarks, pricing, context window, and use-case rankings.
- Muse Spark leads on overall intelligence (ECI 153 vs 141).
- Muse Spark ranks higher for coding (77th vs 41th percentile).
| Attribute | gpt-oss-120b | Muse Spark |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 141 | 153 |
| Coding | 41 | 77 |
| Math | 45 | 64 |
| Reasoning & Knowledge | 19 | 83 |
| Agentic & Tools | 9 | 63 |
| Specifications | ||
| Developer | OpenAI | Meta AI |
| Family | GPT | — |
| Released | Aug 5, 2025 | Apr 8, 2026 |
| Parameters | 116.8B | — |
| Availability | Open weights (unrestricted) | API access |
| Context window | 131K | — |
| Price — $/M input | $0.04 | — |
| Price — $/M output | $0.17 | — |
| Inputs | text | — |
| Outputs | text | — |
| Benchmarks | ||
| AIME 2024/2025 | 89% | 89% |
| APEX | 5% | — |
| GPQA Diamond | 76% | 90% |
| Humanity's Last Exam | 19% | 41% |
| LiveCodeBench | 88% | — |
| METR task horizon | 42 min | — |
| MMLU-Pro | 81% | — |
| SciCode | 39% | 52% |
| SimpleBench | 22% | — |
| SimpleQA Verified | 14% | 66% |
| Terminal-Bench | 19% | — |
| WeirdML | 48% | — |
| τ²-bench | 66% | 92% |
| FrontierMath | — | 39% |
| FrontierMath Tier 4 | — | 15% |
| WebDev Arena | — | 1513 |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is gpt-oss-120b better than Muse Spark?
On Epoch AI's Capabilities Index, Muse Spark scores higher (153) than gpt-oss-120b (141). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is better for coding, gpt-oss-120b or Muse Spark?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Muse Spark ranks higher — 77th vs 41th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.