DeepSeek V4 vs GPT-5.3-Codex
DeepSeek V4 leads in 2 of 8 categories
Arena ELO
Tie
Cheaper
DeepSeek V4
Faster
Tie
Detailed Comparison
| Category | DeepSeek V4 | GPT-5.3-Codex |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Context Window | 128K | 128K |
| Input Price ($/1M) | $0.435 WIN | $1.75 |
| Output Price ($/1M) | $0.87 WIN | $14 |
| 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 or GPT-5.3-Codex?
DeepSeek V4 is approximately 92% cheaper than GPT-5.3-Codex per million tokens.
Which has a larger context window?
DeepSeek V4 supports 128K context, while GPT-5.3-Codex supports 128K.
Is DeepSeek V4 or GPT-5.3-Codex open source?
DeepSeek V4 is open source. GPT-5.3-Codex is proprietary.
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