OpenAI: GPT-5.5 Pro
openai/gpt-5.5-pro
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
Modalities
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In / out price
₩52,650 / ₩315,900
1M
Context
1.05M
Released
Apr 25, 2026
Pricing
Prices are quoted in Korean won. Changes to the exchange rate or margin show up immediately.
| Input (prompt) | ₩52,650 / 1M |
| Output (completion) | ₩315,900 / 1M |
| Cache read | ₩5,265 / 1M |
| Cache write | — |
1,000 input tokens plus 1,000 output tokens costs about ₩369.