GPT Astra 6

Changes from previous version

First GPT-6 Astra release. Successor in role to GPT Sol 5.6 as OpenAI's flagship: large gains on computer use (Agents' Last Exam 59.3% vs 53.6%, OSWorld 2.0 72.6% vs 65.7%), coding (Terminal-Bench 4.0 57.9% vs 37.3%), science (Terminal-Bench Science 0.1 64.6% vs 22.4%), and cyber (ExploitBench 100% vs 78.5%). Alignment evals show 0% unauthorized scope-breaking versus 48% for Sol without production safeguards. Codex can keep searchable notes across context windows. Same $10/$50 list rates as Claude Fable 5.1.

Release Summary

OpenAI's most intelligent and aligned model yet, and the first GPT-6 generation flagship. State-of-the-art on computer use, browsing, software engineering, cybersecurity, science, and professional work. Saturates ARC-AGI-3 (99.9%) and ExploitBench (100%), scores 57.9% on Terminal-Bench 4.0 versus 37.3% for GPT Sol 5.6 and 55.8% for Claude Fable 5.1, and 64.6% on Terminal-Bench Science 0.1 versus 52.6% for Fable 5.1. Meets the Critical cybersecurity threshold under OpenAI's Preparedness Framework; shipping Astra refuses advanced exploit work, with less restrictive defensive access planned through OpenAI Daybreak. Rolling out first to a limited set of organizations, then ChatGPT Plus, Pro, Business, and Enterprise, plus the OpenAI API and AWS. API ID gpt-6-astra. Standard API pricing $10/M input and $50/M output, with $1/M cache reads and $12.50/M cache writes. Fast mode at 2x speed and 2x price. 1.05M context, 128k max output, knowledge cutoff April 30, 2026. Pro, Business, and Enterprise users also get GPT-6 Astra Pro.

Timeline