GPT-6 Astra Model Card
A concise reference for the model’s core specifications, API economics and deployment notes.
DeveloperOpenAI
ReleasedSeptember 3, 2026
Context window1,050,000 tokens
Max output128,000 tokens
Knowledge cutoffApril 30, 2026
Model IDgpt-6-astra
Standard API pricing
| Input | $10 / 1M |
|---|---|
| Cached input | $1 / 1M |
| Output | $50 / 1M |
Best for
OpenAI positions Astra for complex reasoning, coding, computer use, research and document creation.
Supported features
StreamingFunction callingStructured outputsImage inputWeb searchFile searchCode interpreterComputer useMCP
Safety note
OpenAI says Astra is its first broadly deployed model to reach the Critical cybersecurity capability threshold under its Preparedness Framework and describes strengthened safeguards for harmful cyber actions.
Primary sources
Specifications and prices can change. We prefer first-party documentation and record the date each page was reviewed.