GPT 5.5

Details

OpenAI's frontier model — fully-retrained base since GPT-4.5, with 1M context window and strong general reasoning. Priced like Claude Opus; available on the Pro plan and above.

Context window

1M tokens

Max output

272K tokens

Knowledge cutoff

December 2025

Provider

OpenAI GPT

Pricing

Premium

PDF support

Yes

Zero Data Retention

Yes

Added

April 24, 2026

Replaced

July 10, 2026