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DeepSeek-V4-Pro-0813 vs GPT-5.3 Codex
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| Attribute | DeepSeek-V4-Pro-0813 | GPT-5.3 Codex |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 155 | 156 |
| Coding | 76 | 56 |
| Math | 88 | — |
| Reasoning & Knowledge | 69 | 84 |
| Agentic & Tools | 67 | 57 |
| Specifications | ||
| Developer | DeepSeek | OpenAI |
| Family | DeepSeek | GPT |
| Released | Aug 13, 2026 | Feb 5, 2026 |
| Parameters | 1.6T | — |
| Availability | Open weights (unrestricted) | API access |
| Context window | 1M | 400K |
| Price — $/M input | $0.58 | $1.75 |
| Price — $/M output | $1.74 | $14.00 |
| Inputs | text | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 99% | — |
| APEX | 47% | 32% |
| ARC-AGI | 91% | — |
| ARC-AGI-2 | 61% | — |
| GPQA Diamond | 92% | 92% |
| Humanity's Last Exam | 41% | 43% |
| SciCode | 51% | 53% |
| SimpleQA Verified | 53% | — |
| WebDev Arena | 1581 | 1370 |
| WeirdML | 66% | 79% |
| METR task horizon | — | 5.8 h |
| SWE-bench Verified | — | 75% |
| Terminal-Bench | — | 78% |
| τ²-bench | — | 86% |
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.