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GPT-5.6 Sol vs gpt-oss-20b
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| Attribute | GPT-5.6 Sol | gpt-oss-20b |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 162 | — |
| Coding | 95 | 19 |
| Math | 97 | 47 |
| Reasoning & Knowledge | 95 | 11 |
| Agentic & Tools | 67 | 11 |
| Specifications | ||
| Developer | OpenAI | OpenAI |
| Family | GPT | GPT |
| Released | Jul 9, 2026 | Aug 5, 2025 |
| Parameters | — | 20.9B |
| Availability | API access | Open weights (unrestricted) |
| Context window | 1.1M | 131K |
| Price — $/M input | $5.00 | $0.03 |
| Price — $/M output | $30.00 | $0.14 |
| Inputs | file, image, text | text |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | 89% |
| APEX | 40% | — |
| ARC-AGI | 98% | — |
| ARC-AGI-2 | 93% | — |
| GPQA Diamond | 93% | 69% |
| Humanity's Last Exam | 47% | 10% |
| SciCode | 56% | 34% |
| SimpleBench | 72% | — |
| SimpleQA Verified | 72% | — |
| WebDev Arena | 1620 | — |
| WeirdML | 89% | 41% |
| τ²-bench | 85% | 60% |
| LiveCodeBench | — | 78% |
| MMLU-Pro | — | 75% |
| Terminal-Bench | — | 3% |
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.