DeepSeek V4-Pro vs GPT-5.5
GPT-5.5 leads in 2 of 8 categories
Arena ELO
Tie
Cheaper
GPT-5.5
Faster
Tie
Detailed Comparison
| Category | DeepSeek V4-Pro | GPT-5.5 |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Context Window | 128K | 128K |
| Input Price ($/1M) | N/A | $5 WIN |
| Output Price ($/1M) | N/A | $30 WIN |
| Arena ELO | N/A | N/A |
| Coding | N/A | N/A |
| Reasoning | N/A | N/A |
| Speed (tokens/sec) | N/A | N/A |
| Open Source | No | No |
Frequently Asked Questions
Which has a larger context window?
DeepSeek V4-Pro supports 128K context, while GPT-5.5 supports 128K.
Is DeepSeek V4-Pro or GPT-5.5 open source?
DeepSeek V4-Pro is proprietary. GPT-5.5 is proprietary.
Related Articles
More Comparisons
DeepSeek V4-Pro vs Claude Opus 4.5DeepSeek V4-Pro vs Llama 4 ScoutDeepSeek V4-Pro vs Claude Sonnet 4.6DeepSeek V4-Pro vs Claude Haiku 4.5DeepSeek V4-Pro vs Qwen 3.6DeepSeek V4-Pro vs Claude Fable 5DeepSeek V4-Pro vs Kimi K2.7 CodeDeepSeek V4-Pro vs DeepSeek V4 FlashGPT-5.5 vs Claude Opus 4.5GPT-5.5 vs Llama 4 ScoutGPT-5.5 vs Claude Sonnet 4.6GPT-5.5 vs Claude Haiku 4.5GPT-5.5 vs Qwen 3.6GPT-5.5 vs Claude Fable 5GPT-5.5 vs Kimi K2.7 CodeGPT-5.5 vs DeepSeek V4 Flash