DeepSeek-V3 vs GPT-5.1
DeepSeek vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 58.1)
- •DeepSeek-V3 is cheaper ($0.23 vs $1.25 per 1M input)
- •GPT-5.1 is faster
- •GPT-5.1 has a larger context window (400K)
| DeepSeek-V3 | GPT-5.1 | |
|---|---|---|
| Intelligence index | 58.1 | 89 |
| Developer | DeepSeek | OpenAI |
| Type | LLM | LLM |
| Access | Open weights | API only |
| Context window | 131,072 tokens | 400,000 tokens |
| Input price | $0.23 / 1M | $1.25 / 1M |
| Output price | $0.91 / 1M | $10.00 / 1M |
| Speed | 100 tok/s | 115 tok/s |
| Released | December 26, 2024 | November 12, 2025 |
| Parameters | 671B total / 37B active (MoE) | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
DeepSeek-V3
GPT-5.1
AIME 2025
26
94
GPQA Diamond
59.1
88.1
Humanity’s Last Exam
3.6
26.5
LiveCodeBench
37.6
86.8
MMLU-Pro
75.9
87