OpenAI GPT-6 Astra - Box Dev Docs

According to OpenAI, OpenAI GPT-6 Astra is their most capable model, built for the hardest end-to-end work. It is designed for complex reasoning, coding, computer use, research, and document creation.

Model details

Item	Value	Description
Model name	GPT-6 Astra	The name of the model.
Model category	Ultra	The category of the model: Standard, Premium, or Ultra.
API model name	`openai__gpt_6_astra`	The name of the model that is used in the . You must provide this exact name for the API to work.
Compliance	N/A	Government compliance frameworks and authorizations applicable to this model.
Hosting layer	OpenAI	The trusted organization that securely hosts the LLM.
Model provider	OpenAI	The organization that provides this model.
Release date	September 4th, 2026	The release date for the model.
Knowledge cutoff date	April 30th, 2026	The date after which the model does not receive information updates.
Input context window	1,050,000 tokens	The number of tokens supported by the input context window.
Maximum output tokens	128k tokens	The number of tokens that can be generated by the model in a single request.
Empirical throughput	Not specified	The number of tokens the model can generate per second.
Open source	No	Specifies whether the model’s code is available for public use.

Additional documentation

For additional information, see official OpenAI GPT-6 Astra documentation.

Last modified on September 11, 2026