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| 1 model | openaiOpenAI: GPT-5.5Remove × |
|---|---|
| What’s different | GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a… |
| Date | Apr 24, 2026Listed |
API prices USD · provider configuration shown below | |
| Listed rate | $2.50 in / $15.00 out/ 1M tokensOpenAI · via OpenRouter · all routes ↗openai/flex · tier=flex · prompt ≤ 272000 tokens |
| Provider endpoints | 9 endpoints → |
Specifications | |
| Context window | 1.1M |
| Max output | 128K |
| Parameters | — |
| Tool calling | Supported |
| Structured output | Supported |
| Image input | Supported |
| Reasoning | Supported |
| Prompt caching | Supported |