Text generation / OpenAI

gpt-6-astra

StreamingFunction callingStructured outputs

Overview

GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work. It is suited for advanced analysis, software engineering, deep research, scientific work, and document creation, with particular strengths in long-horizon agentic tasks that involve computer and browser use.

Model type: Text generation
Input: Text / Image
Output: Text
Endpoints: chat / chat_completion

Tiered billing details

Tier	Input	Output	Cache hit	Cache write
≤272K input tokens	$0.0100/1K	$0.0500/1K	$0.0010/1K	$0.0125/1K
>272K input tokens	$0.0200/1K	$0.0750/1K	$0.0020/1K	$0.0250/1K

Billed bylen (input context token count). Coefficient is the $ / 1M tokens price. Default group price (other groups converted by discount).

Code example

Call with gpt-6-astra :

curl https://www.starunion.net/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-6-astra",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'