OpenAI Cyber Big Closed weights

GPT-5.5-Cyber

189 days since OpenAI announced it · 7 May 2026

GPT-5.5-Cyber is a closed-weights cyber model from OpenAI, announced 7 May 2026. It costs $12.50 per 1M input tokens and $75 per 1M output tokens.

Input: $12.50; per 1M tokens
Cache write: —; per 1M tokens
Cache read: —; per 1M tokens
Output: $75; per 1M tokens
Context window: —; tokens
Parameters: —; not disclosed

Announcement: openai.com/index/gpt-5-5-with-trusted-access-for-cyber
Docs: developers.openai.com/api/docs/pricing

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OpenAI · Big · Cyber

closed weights

A new one every ~90 days — due in ~83d.

GPT-6 Cyber +90d 5 Nov 2026
GPT-5.6 Cyber +92d 7 Aug 2026
GPT-5.5-Cyber +23d 7 May 2026
GPT-5.4-Cyber 14 Apr 2026

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Facts last updated 7 Nov 2026, from OpenAI’s own pages.