GPT-5.5 Pro
language modelOpenAI
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...
Key facts
| Made by | OpenAI |
|---|---|
| Type | language model |
| Released | April 24, 2026 |
| Reads at once | 1,050,000 tokens |
| Price (API, per million tokens) | $30 in · $180 out |
| Input → output | file, image, text → text |
Questions about GPT-5.5 Pro
Who makes GPT-5.5 Pro?
GPT-5.5 Pro is made by OpenAI.
When was GPT-5.5 Pro released?
We first saw GPT-5.5 Pro listed on April 24, 2026.
How much does GPT-5.5 Pro cost?
Through OpenRouter it costs $30 per million input tokens and $180 per million output tokens. Prices change, so check the provider before you build on it.
How much text can GPT-5.5 Pro read at once?
Up to 1,050,000 tokens, roughly 787.5K words.
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