GPT-6 Astra
GPT-6 Astra is OpenAI's most capable model for complex reasoning, coding, computer use, research, and document creation.
ECI STANDING#1 of 266
SCORE166.31163.0–171.88 CI
FRONTIER LAGLaunched in the leadNothing released before it had scored higher.
SCORES LIKE THESE MODELSClaude Fable 5.1Anthropic · Sep 2026164.47Claude Fable 5Anthropic · Jun 2026163.27Claude Opus 5Anthropic · Jul 2026162.3GPT-5.5 ProOpenAI · Apr 2026162.25
Full Epoch Capabilities Index ranking ↗From the lab
Launch announcement · Sep 3, 2026GPT-6 Astra: A new generation of intelligenceRelated article · Sep 9, 2026GPT-6 Astra: The next generation in intelligence for workRELEASE DATESep 3, 2026
WEIGHTSClosed weights
CONTEXT WINDOW1.05M
MAX OUTPUT128K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image, pdf
OUTPUTStext
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