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DeepSeek-V4-Pro-0813 vs GPT-5.5 Pro
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| Attribute | DeepSeek-V4-Pro-0813 | GPT-5.5 Pro |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 155 | 162 |
| Coding | 76 | — |
| Math | 88 | 98 |
| Reasoning & Knowledge | 69 | 87 |
| Agentic & Tools | 67 | — |
| Specifications | ||
| Developer | DeepSeek | OpenAI |
| Family | DeepSeek | GPT |
| Released | Aug 13, 2026 | Apr 23, 2026 |
| Parameters | 1.6T | — |
| Availability | Open weights (unrestricted) | API access |
| Context window | 1M | 1.1M |
| Price — $/M input | $0.58 | $30.00 |
| Price — $/M output | $1.74 | $180.00 |
| Inputs | text | file, image, text |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 99% | 100% |
| APEX | 47% | — |
| ARC-AGI | 91% | 97% |
| ARC-AGI-2 | 61% | 85% |
| GPQA Diamond | 92% | 94% |
| Humanity's Last Exam | 41% | — |
| SciCode | 51% | — |
| SimpleQA Verified | 53% | 65% |
| WebDev Arena | 1581 | — |
| WeirdML | 66% | — |
| FrontierMath | — | 52% |
| FrontierMath Tier 4 | — | 40% |
| SimpleBench | — | 77% |
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.