GPT-6 Astra
GPT-6 Astra is OpenAI’s model for difficult reasoning and extended coding work. Its large context limit is useful for substantial inputs, but the price changes before that limit is reached.
A large context changes the cost of the whole request
Above 272,000 input tokens, Astra charges twice the input and cache rates and 1.5 times the output rate for the full request. The advertised context capacity and the base price therefore describe different operating conditions.GPT-6 Astra model reference
Image understanding is separate from image generation
Astra accepts image input. Image generation is a supported tool in the Responses API, rather than an image output modality of the language model itself.GPT-6 Astra model reference
Build a decision task before choosing the model
Practical guidance. For a large technical review, ask for a decision, its supporting file references and unresolved questions. Keep a few difficult examples to compare with a less costly model. A long response is not, by itself, evidence that the review is correct.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Access | API |
| Model identifiers | gpt-6-astra |
| Context window | 1,050,000 tokens API context limit GPT-6 Astra model reference |
| Maximum output | 128,000 tokens Maximum output GPT-6 Astra model reference |
| Input price | 10 USD per million tokens Standard text input; up to 272,000 input tokens GPT-6 Astra model reference |
| Output price | 50 USD per million tokens Standard text output; up to 272,000 input tokens GPT-6 Astra model reference |
| Input and output | Text and images in; text out. Audio and video are not supported.GPT-6 Astra model reference |
| Reasoning controls | low, medium, high, xhigh and maxGPT-6 Astra model reference |
| Fine-tuning | Not supportedGPT-6 Astra model reference |
| Maximum input | 922,000 tokens within the total context window.GPT-6 Astra model reference |
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