DeepSeek V4 Flash vs GPT-5.5
DeepSeek V4 Flash leads in 2 of 8 categories
Arena ELO
Tie
Cheaper
DeepSeek V4 Flash
Faster
Tie
Detailed Comparison
| Category | DeepSeek V4 Flash | GPT-5.5 |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Context Window | 128K | 128K |
| Input Price ($/1M) | $0.14 WIN | $5 |
| Output Price ($/1M) | $0.28 WIN | $30 |
| 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 | Yes | No |
Frequently Asked Questions
Which is cheaper, DeepSeek V4 Flash or GPT-5.5?
DeepSeek V4 Flash is approximately 99% cheaper than GPT-5.5 per million tokens.
Which has a larger context window?
DeepSeek V4 Flash supports 128K context, while GPT-5.5 supports 128K.
Is DeepSeek V4 Flash or GPT-5.5 open source?
DeepSeek V4 Flash is open source. GPT-5.5 is proprietary.
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