OpenAI · GPT-6 · Available

GPT-6 Astra

GPT-6 Astra is OpenAI's most capable model, built for complex work across code, apps and research. It runs in ChatGPT, in Codex and on the API as `gpt-6-astra`, with a 1.05M-token context window and 128k max output, at $10 / $50 per 1M input/output tokens.

· today
ChatGPT on aistack.sh
API price per 1M tokens
$10 in / $50 out
Context window
1.05M tokens

GPT-6 Astra specs

StatusAvailable
API model IDgpt-6-astra
API price (in / out)$10 / $50 per 1M tokens
Cache read$1 per 1M tokens
Context window1.05M tokens
PlatformsOpenAI API

Where you can use GPT-6 Astra

ChatGPT

In the ChatGPT desktop app and ChatGPT web. Some paid plans omit the Astra Extra High reasoning setting.

Codex
Codex

In the Codex CLI, IDE extension and Codex cloud.

  • OpenAI says availability depends on the rollout, your sign-in method and your client.
  • API prices shown are OpenAI's short-context rates; long-context requests are billed higher.

GPT-6 Astra compared

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GPT-6 Astra FAQ

How much does GPT-6 Astra cost on the API?

$10 per 1M input tokens, $1 per 1M cached input tokens and $50 per 1M output tokens at OpenAI's short-context rates. Long-context requests cost more.

What is the GPT-6 Astra context window?

1,050,000 tokens, with up to 128,000 output tokens, according to OpenAI's API model page.

Where can I use GPT-6 Astra?

OpenAI lists it in the ChatGPT desktop app and on the web, in the Codex CLI, IDE extension and Codex cloud, and on the API. Availability depends on the rollout, your sign-in method and your client.

Other OpenAI models

GPT-6 Luna
Sep 22, 2026 · Rolling out
GPT-6 Sol
Sep 22, 2026 · Rolling out

Sources