By No Code MBA · Facts checked
- Provider
- OpenAI
- Announcement date
- Status at last check
- Generally available
- Model family
- GPT-6
- Capabilities
- Text, Image, Coding
What changed
GPT-6 Astra (gpt-6-astra) is OpenAI's model for demanding reasoning and computer-based work. OpenAI's model docs list a 1,050,000-token context window (922,000 max input), up to 128,000 output tokens, text and image input with text output, an April 30, 2026 knowledge cutoff, and reasoning effort settings from low to max. API pricing is $10 per million input tokens, 100 times the rate OpenAI lists for GPT-6 Luna.
Access and availability
Available in the OpenAI API as gpt-6-astra on the Chat Completions, Responses and Batch endpoints, with rate limits set by usage tier. OpenAI's pages do not state ChatGPT and Codex availability by plan.
Official access documentationPricing
$10 per million input tokens, $1 per million cached input tokens and $50 per million output tokens
Official pricingWhat you can build
Evaluate a difficult multi-step task against explicit acceptance criteria before changing your default model.
Limitations
Not supported on Realtime, Assistants, fine-tuning or audio endpoints, and output is text only. It is priced well above other GPT-6 models.