DeepSeek R1 0528vsGPT-5 Codex
GPT-5 Codex is the newer model, released after DeepSeek R1 0528.
| Spec | DeepSeek R1 0528 | GPT-5 Codex |
|---|---|---|
| Input price | Free | — |
| Output price | Free | — |
| Context window | 164K tokens | — |
| Weights | Open | — |
| Free API (OpenRouter) | No | No |
| Released | May 2025 | Sep 2025 |
| SWE-bench Verified | 57.6% | 74.5% |
Our Verdict
DeepSeek R1 0528
GPT-5 Codex
Not enough votes to call it. On the specs, nothing separates them.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek R1 0528
Input
$0.000
Output
$0.000
GPT-5 Codex
Input
—
Output
—
Where to run it
4 hosts, cheapest first
GPT-5 Codex
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.
Writing DNA
Style Comparison
Similarity
30%
DeepSeek R1 0528 uses 5.6x more emoji
DeepSeek R1 0528
GPT-5 Codex
59%Vocabulary64%
14wSentence Length17w
0.47Hedging0.38
5.1Bold2.3
3.6Lists3.5
0.82Emoji0.15
0.25Headings0.49
0.24Transitions0.05
Based on 20 + 13 text responses
Research
What we learned reading every model
FAQ
Common questions
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