OpenAI Launches GPT-6 Astra With Harvey Endorsement and Sharper Scope Guardrails

OpenAI today began releasing GPT-6 Astra, a frontier model that secured an immediate endorsement from legal AI vendor Harvey and arrives with sharply reduced scope-violation rates compared to its predecessor. Access expands over coming days to ChatGPT Plus, Pro, Business, and Enterprise tiers, with API availability through OpenAI, Microsoft Azure, and AWS Bedrock.

The launch extends OpenAI's cadence of frontier-model refreshes that have reshaped legal technology budgets since 2024. GPT-5.6 Sol, the prior release, was widely adopted across legal research, contract review, and drafting workflows. Astra enters a more crowded field: Harvey, LexisNexis Protégé, Thomson Reuters CoCounsel, and a wave of due-diligence and litigation-funding startups all build on foundation models from OpenAI, Anthropic, and Google DeepMind. What differentiates this release for legal buyers is not raw reasoning but behavioral control — the model's willingness to stay within delegated scope.