GPT-6 Astra

OpenAI · Released September 2026

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...

It is part of OpenAI's GPT family, where Sol, Luna and Terra mark the current generation's capability tiers and Pro servings trade speed for deeper computation.

Facts and pricing

Provider

OpenAI

Context window

1.1M tokens

Input price

110 credits / 1M tokens ($10.00 raw)

Output price

550 credits / 1M tokens ($50.00 raw)

Vision (image input)

Yes

Tool calling

Yes

Extended reasoning

No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.10x margin. Raw prices shown per 1M tokens.

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What GPT-6 Astra is best for

• Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
• Very long documents and codebases: a 1.1M-token window fits entire books or repositories in one conversation
• Working with images: screenshots, charts, photos and scanned documents alongside text
• Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Example prompts

Prompts that suit a frontier model like GPT-6 Astra:

• Review this business plan and give me the three hardest questions an investor would ask
• Rewrite this announcement so it lands with both engineers and executives
• I am choosing between two job offers, help me think through the tradeoffs
• Draft a technical design doc for a rate limiter, including failure modes

OpenAI family

All 90 OpenAI models

Frequently asked questions

What is GPT-6 Astra?

GPT-6 Astra is an AI model by OpenAI. 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...

How much does GPT-6 Astra cost on Zeplik?

Input tokens cost 110 credits per million and output tokens 550 credits per million (1 credit = $0.10; the raw provider rates are $10.00 and $50.00 per million). New accounts start with free credits.

How long can a conversation with GPT-6 Astra be?

GPT-6 Astra has a 1.1M-token context window (1,050,000 tokens), which covers the conversation plus any documents you attach.

Does GPT-6 Astra support images and tools?

GPT-6 Astra accepts image input and supports tool calling.

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