GPT-5.5 Pro
openai/gpt-5.5-pro-20260423
OpenAI GPT-5.5 Pro, released on 2026-04-24, accepts file, image, and text inputs and produces text output with a context window of 1,050,000 tokens. The model supports tool integration and reasoning capabilities, and its weights are not publicly released. Pricing is set at 30 units per million input tokens and 180 units per million output tokens.
- tool use
- structured outputs
- reasoning
At a glance
Specifications
What the API gives you
- Context window
- 1.1M tokens
- Max output
- 128K tokens
- Input price
- $30 / 1M tokens
- Output price
- $180 / 1M tokens
- Cache read
- —
- Modalities
- file, image, text → text
- Knowledge cutoff
- Dec 1, 2025
- Released
- Apr 24, 2026
Recommendation coverage
Where this model appears
Not currently included in a published recommendation. This means the available task-specific evidence did not support a ranking yet—not that the model was reviewed and rejected.
Benchmarks
No independent benchmark results are linked to this model yet. We keep it visible while withholding quality claims until usable results arrive.
Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.