DeepSeek-V4-Pro-0813 vs GPT-5.5 Pro
DeepSeek-V4-Pro-0813 (DeepSeek) and GPT-5.5 Pro (OpenAI) compared on benchmarks, pricing, context window, and use-case rankings.
- GPT-5.5 Pro leads on overall intelligence (ECI 162 vs 155).
- DeepSeek-V4-Pro-0813 is cheaper on input tokens — $0.58 vs $30.00 per 1M.
- GPT-5.5 Pro has a larger context window (1.1M vs 1M tokens).
| Attribute | DeepSeek-V4-Pro-0813 | GPT-5.5 Pro |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 155 | 162 |
| Coding | 78 | — |
| Math | 89 | 99 |
| Reasoning & Knowledge | 70 | 87 |
| Agentic & Tools | — | — |
| 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% |
| 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 | 1582 | — |
| 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.
Frequently asked questions
Is DeepSeek-V4-Pro-0813 better than GPT-5.5 Pro?
On Epoch AI's Capabilities Index, GPT-5.5 Pro scores higher (162) than DeepSeek-V4-Pro-0813 (155). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is cheaper, DeepSeek-V4-Pro-0813 or GPT-5.5 Pro?
DeepSeek-V4-Pro-0813 is cheaper on input tokens at $0.58 per million, versus $30.00 (representative OpenRouter pricing).
Which has a larger context window, DeepSeek-V4-Pro-0813 or GPT-5.5 Pro?
GPT-5.5 Pro supports up to 1.1M tokens, compared with 1M for the other.
Want a different match-up? Open the compare tool to add or swap models.
More comparisons
Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.