Frontier Line and access · Releases

OpenAI Previews GPT-5.6 Model Series

Sep 11, 2026, first seen via OpenAI & Anthropic publications

OpenAI began a limited preview of GPT-5.6 Sol, Terra, and Luna with stronger reported coding, science, and cybersecurity capabilities.

Read the original at openai.comOpens the publisher's site in a new tab

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