DeepSeek-V4-Flash vs GPT-5 nano
DeepSeek vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •DeepSeek-V4-Flash has the higher intelligence index (89.4 vs 71.2)
- •GPT-5 nano is cheaper ($0.05 vs $0.10 per 1M input)
- •GPT-5 nano is faster
- •DeepSeek-V4-Flash has a larger context window (1M)
| DeepSeek-V4-Flash | GPT-5 nano | |
|---|---|---|
| Intelligence index | 89.4 | 71.2 |
| Developer | DeepSeek | OpenAI |
| Type | LLM | LLM |
| Access | Open weights | API only |
| Context window | 1,048,576 tokens | 400,000 tokens |
| Input price | $0.10 / 1M | $0.05 / 1M |
| Output price | $0.20 / 1M | $0.40 / 1M |
| Speed | 109 tok/s | 500 tok/s |
| Released | April 24, 2026 | August 7, 2025 |
| Parameters | 284B (13B active) | — |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
Shared benchmarks
DeepSeek-V4-Flash
GPT-5 nano
GPQA Diamond
89.4
71.2
Humanity’s Last Exam
32.1
8.7