OpenAI Biology Medium Closed weights

GPT-Rosalind

210 days since OpenAI announced it · 16 Apr 2026

GPT-Rosalind is a closed-weights biology model from OpenAI, announced 16 Apr 2026. It costs $5 per 1M input tokens and $25 per 1M output tokens.

Input: $5; per 1M tokens
Cache write: —; per 1M tokens
Cache read: —; per 1M tokens
Output: $25; per 1M tokens
Context window: —; tokens
Parameters: —; not disclosed

Announcement: openai.com/index/introducing-gpt-rosalind
Docs: developers.openai.com/api/docs/pricing

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OpenAI · Medium · Rosalind

closed weights

GPT-Rosalind 16 Apr 2026

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