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GPT-6 Astra

GPT-6 Astra is OpenAI's flagship API model for complex reasoning, coding, computer use, research, and other tool-heavy professional workflows.

Official siteVerified Oct 3, 2026

Overview

The model has a 1.05M-token context window, supports text and image input, and can return up to 128K output tokens. OpenAI exposes it through the Responses API and related developer tooling.

Model specifications

Family
GPT-6
Context
1,050,000 tokens
Input
Text, Image
Output
Text
Open weights
No
Capabilities
Reasoning, Vision, Tool Use, Function Calling, Structured Output, Web Search, Code Execution, Computer Use, Image Generation

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