GPT-5.5
🔬 PreviewFrontier GPT model for professional work, coding, and complex reasoning in ChatGPT and Codex
Context Window
1M
Input Price
$5.00/1M
Output Price
$30.00/1M
Released
Apr 23, 2026
Capabilities
textvisionreasoningcodefunction-callingjson-mode
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Get API Access →Version History
Apr 23, 2026New Release
GPT-5.5 introduced for ChatGPT, Codex, and upcoming API access with 1M context
Apr 23, 2026Pricing Change
API pricing announced at $5.00 per 1M input tokens and $30.00 per 1M output tokens