OpenAI: GPT-5.1-Codex-Max

Name: OpenAI: GPT-5.1-Codex-Max
Brand: openai
SKU: openai/gpt-5.1-codex-max
Price: 2193.75 KRW
Availability: InStock

openai/gpt-5.1-codex-max

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GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...

Modalities

TextImage

In / out price

₩2,194 / ₩17,550

Context

400K

Released

Dec 5, 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	₩219 / 1M
Cache write	—

1,000 input tokens plus 1,000 output tokens costs about ₩19.74.