OpenAI Biology Big Closed weights

GPT-6 Rosalind

13 days since OpenAI announced it · 30 Oct 2026

GPT-6 Rosalind is a closed-weights biology model from OpenAI, announced 30 Oct 2026. It costs $15 per 1M input tokens and $75 per 1M output tokens.

Input: $15; 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: developers.openai.com/api/docs/changelog
Docs: developers.openai.com/api/docs/pricing

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OpenAI · Big · Rosalind

closed weights

GPT-6 Rosalind 30 Oct 2026

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