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GPT-5.6 Terra vs Muse Spark
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| Attribute | GPT-5.6 Terra | Muse Spark |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | — | 154 |
| Coding | 91 | 82 |
| Math | — | 68 |
| Reasoning & Knowledge | 91 | 84 |
| Agentic & Tools | 48 | 62 |
| Specifications | ||
| Developer | OpenAI | Meta AI |
| Family | GPT | — |
| Released | Jul 9, 2026 | Apr 8, 2026 |
| Parameters | — | — |
| Availability | — | API access |
| Context window | 1.1M | — |
| Price — $/M input | $2.50 | — |
| Price — $/M output | $15.00 | — |
| Inputs | file, image, text | — |
| Outputs | text | — |
| Benchmarks | ||
| GPQA Diamond | 93% | 90% |
| Humanity's Last Exam | 42% | 41% |
| SciCode | 54% | 52% |
| τ²-bench | 86% | 92% |
| AIME 2024/2025 | — | 89% |
| FrontierMath | — | 39% |
| FrontierMath Tier 4 | — | 15% |
| SimpleQA Verified | — | 66% |
| 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.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.