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GPT-6 Astra

OpenAI's top model, built for deep research, programming and creating documents. Priced to match.

Last updated October 16, 2026.

Costs here use the prices AI companies charge software developers, so they show relative cost, not your monthly bill. See what ChatGPT, Claude and Gemini charge you.

Made by OpenAI, the company behind ChatGPT. Most capable.

What it costs

1,000-word essay: $0.07 (about 7 cents)
100 chat messages: $13.12
50-page PDF summary: $0.37 (about 37 cents)

Based on list prices and the assumptions on How we work. Your real cost will differ.

At a glance

Smartness: ★★★★★ (5 of 5) (our banding of the Artificial Analysis score, where available)
Reads at once: about 1,580 pages (rule of thumb)
Understands: files, pictures, text
Free to download and run yourself: No
Free to use: Not free for developers. Free app plans

App plans and prices for ChatGPT: see plans.

Best for

deep researchprogrammingdocuments

Watch out for

The most expensive tier on our list.

Frequently asked

How much does GPT-6 Astra cost to use?
A 1,000-word essay costs about $0.07 (about 7 cents); summarizing a 50-page PDF about $0.37 (about 37 cents). These are developer (API) prices, not an app subscription.

What is GPT-6 Astra best for?
OpenAI's top model, built for deep research, programming and creating documents. Priced to match.

How much can GPT-6 Astra read at once?
About 1,580 pages (a rule of thumb: 1,050,000 tokens at roughly 500 words a page).

Can I download GPT-6 Astra for free?
No. It is only available through the maker or other paid services.

Under the hood

Maker	OpenAI
Price per 1M input tokens	$10.00 (changes with input length or day of week)
Price per 1M output tokens	$50.00
Context size	1.05M tokens (1,050,000)
Artificial Analysis Intelligence Index	52.7 (source, via OpenRouter)
Open weights	No
Speed	Not measured yet
Listed	2026-09-04

Maker's description (technical)

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...

View on OpenRouter. Our verdict above is editorial, not benchmarked by us.