GPT-6 Astra

OpenAI · Released Sep 3, 2026

$10

Input price / MTok

$50

Output price / MTok

1.1M

Context window

98.6

ARC-AGI-3 (abstract reasoning)

97.6

FrontierMath Tier 4 v2

100

ExploitBench (cybersecurity)

92.7

ScreenSpot-Pro (desktop automation)

57.2

Humanity's Last Exam (with tools)

Artificial Analysis Intelligence Index

Summary

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 #40 of 40 for input price, placing it among the higher-priced models tracked here.

Its context window of 1.1M tokens ranks #4 of 41 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.

Benchmarks

Technical specs

OpenAI

Similar Models

Models with the most shared benchmark coverage and closest scores to GPT-6 Astra.

Compare GPT-6 Astra side by side

Pre-filled with 2 similar models