DeepSeek V4 Pro 0813 vs OpenAI GPT-5.1-Codex-Mini
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- GPT-5.1-Codex-Mini is 1.4× cheaper at a typical mix of 3 input tokens per output token.
- DeepSeek V4 Pro 0813 accepts longer prompts: 1M vs 400K tokens.
- DeepSeek V4 Pro 0813 output costs $0.491 per 1M via Baidu, against the list price of $1.98.
- DeepSeek V4 Pro 0813 is the newer model (released 2026-08-12).
| DeepSeek V4 Pro 0813 | GPT-5.1-Codex-Mini | |
|---|---|---|
| Vendor | DeepSeek | OpenAI |
| Released | 2026-08-12 | 2025-11-13 |
| Input / 1M | $0.66 | $0.25 |
| Output / 1M | $1.98 | $2.00 |
| Cached input / 1M | $0.022 | $0.03 |
| Blended / 1M (3:1) | $0.99 | $0.688 |
| Context | 1M | 400K |
| Max output | 393K | 128K |
| Accepts | text | text, image |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 25 | 1 |
| Cheapest provider, output | $0.491 | $2.00 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | Operational |
Cost calculator
DeepSeek V4 Pro 0813
$69.30 per month$2.31 per day
GPT-5.1-Codex-Mini
$45.00 per month$1.50 per day
GPT-5.1-Codex-Mini saves $24.30 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
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