GPT-6 Astra

GPT-6 Astra is a proprietary language model from OpenAI, released on Sep 3, 2026.

At $10 input and $50 output per million tokens, it ranks #33 of 33 for input price, placing it among the higher-priced models tracked here.

Its context window of 1.1M tokens ranks #4 of 34 for context depth in this dataset.

It targets agents, coding, research workloads.

Ships with web search, code interpreter, a hosted shell, apply-patch, computer use, and MCP support built in. Staged rollout starting with a limited partner preview Sep 3 2026, then ChatGPT Plus/Pro/Business/Enterprise plus the API and AWS over the following days. First OpenAI model to hit the 'Critical' cybersecurity threshold under the company's own Preparedness Framework; its most advanced cyber capabilities are gated behind the enterprise-only 'Daybreak' program rather than shipped broadly. Fortune reported OpenAI quietly revised some evaluation metrics upward after a delayed publication of the launch announcement, a credibility flag independent of the ARC-AGI-3 discrepancy above. Strongest, most independently-corroborated advantage across hands-on reviews is cost/token efficiency on agentic coding and robotics tasks rather than raw intelligence; the cross-vendor Artificial Analysis index and Humanity's Last Exam both still favor Claude Fable 5.1 and Opus 5. API identifier gpt-6-astra, knowledge cutoff Apr 30 2026.