OpenAI: GPT-5.1-Codex
openai/gpt-5.1-codex
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Modalities
TextImage
In / out price
₩2,194 / ₩17,550
1M
Context
400K
Released
Nov 14, 2025
Pricing
Prices are quoted in Korean won. Changes to the exchange rate or margin show up immediately.
| Input (prompt) | ₩2,194 / 1M |
| Output (completion) | ₩17,550 / 1M |
| Cache read | ₩228 / 1M |
| Cache write | — |
1,000 input tokens plus 1,000 output tokens costs about ₩19.74.