DeepSeek: DeepSeek V4 Pro 0423 vs OpenAI: GPT-5.1-Codex
deepseek vs openai
On price, DeepSeek: DeepSeek V4 Pro 0423 is cheaper (blended cost is about 0.12× that of OpenAI: GPT-5.1-Codex).
On capability, OpenAI: GPT-5.1-Codex has the higher intelligence index (24) — better for complex reasoning.
Verdict: pick DeepSeek: DeepSeek V4 Pro 0423 on a budget, or OpenAI: GPT-5.1-Codex for output quality. Full details below.
Side-by-Side Specs
| Metric | DeepSeek: DeepSeek V4 Pro 0423 | OpenAI: GPT-5.1-Codex |
|---|---|---|
| Input /1M | $0.34 | $1.25 |
| Output /1M | $0.69 | $10.00 |
| Blended (3:1) | $0.43 | $3.44 |
| Context | 1.0M | 400K |
| Intelligence | 23 | 24 |
| Coding | 69 | 37 |
| Math | — | 96 |
| Speed | 84 tok/s | 125 tok/s |
| CPS Grade | A | A |
FAQ
Which is cheaper, DeepSeek: DeepSeek V4 Pro 0423 or OpenAI: GPT-5.1-Codex?
On price, DeepSeek: DeepSeek V4 Pro 0423 is cheaper (blended cost is about 0.12× that of OpenAI: GPT-5.1-Codex). DeepSeek: DeepSeek V4 Pro 0423: $0.3428 in / $0.6856 out; OpenAI: GPT-5.1-Codex: $1.25 in / $10 out (per 1M tokens).
Which is smarter, DeepSeek: DeepSeek V4 Pro 0423 or OpenAI: GPT-5.1-Codex?
On capability, OpenAI: GPT-5.1-Codex has the higher intelligence index (24) — better for complex reasoning. Coding index: DeepSeek: DeepSeek V4 Pro 0423 69 vs OpenAI: GPT-5.1-Codex 37.
Which one should I choose?
Verdict: pick DeepSeek: DeepSeek V4 Pro 0423 on a budget, or OpenAI: GPT-5.1-Codex for output quality. Full details below.