OpenAI: GPT-6 Astra API
OpenAI's flagship model for the hardest end-to-end work, including complex reasoning, coding, computer use, research and document creation.
- Context window: 1,050,000 tokens
- Max output: 128,000 tokens
- Input: text, image
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2026-09-03
- Knowledge cutoff: 2026-04-30
Frequently Asked Questions
What is the context window of GPT-6 Astra?
GPT-6 Astra supports a context window of up to 1,050,000 tokens.
Does GPT-6 Astra support function calling?
Yes. GPT-6 Astra supports tool / function calling.
Does GPT-6 Astra support reasoning?
Yes. GPT-6 Astra is a reasoning-capable model.
What is the knowledge cutoff of GPT-6 Astra?
The knowledge cutoff of GPT-6 Astra is 2026-04-30.