Language model · from 12 credits
Write and analyze with GPT-6 Astra
GPT-6 Astra is OpenAI's most capable model, released in early September 2026: complex reasoning, research, document writing and multi-step work, with a one-million-token context. It is the GPT to pick when the task is genuinely hard: structuring an entire project, arbitrating between conflicting constraints, producing a text that must stand on its own without a second read. Its cost sits at the very top of the grid, alongside Claude Fable 5.1; for routine work, GPT-5.5 or GPT-5.6 Luna are more than enough.
What GPT-6 Astra actually is
GPT-6 Astra is OpenAI's most capable language model, made available to developers on 4 September 2026. OpenAI positions it as its reference model for complex reasoning, coding, computer use, research and document creation. It reads text, images and PDF files, carries a context window of just over one million tokens, and can search the web when the platform hosting it allows.
In practice, it is the GPT you bring out when the task is genuinely hard: a project to structure end to end, conflicting constraints to arbitrate, a long text that must stand without a second read. On everyday requests, GPT-5.5 lands close for less money; Astra pulls ahead as soon as the reasoning gets long.
Why so few sites offer it
Three days after release, GPT-6 Astra is reachable only through OpenAI's API and a handful of gateways, and it is priced at ten dollars per million input tokens and fifty per million output tokens: four times GPT-5.5. Most consumer tools wait for the price to drop or stay on the previous generation. Imaginode wired it in on 7 September 2026, as it does with every model that lands in the catalogue, on the same account, the same credits and the same canvas as image, video and voice.
There is no ChatGPT subscription to take out and no API key to manage: each message is paid with your credits, and the exact price appears on the button before you send. A short message stays a short message; what you do not consume is not billed.
What it does best on the canvas
In Imaginode, GPT-6 Astra lives in the Text node. You give it an instruction, connect other texts or images to analyse, and its answer feeds straight into the Image and Video nodes wired behind it. That is where it shines: turning a messy brief into a consistent series of prompts, writing a video script shot by shot, proofreading a brand page, or describing a reference photo precisely enough for an image model to reproduce it.
Long workflows are its ground: analyse, then rewrite, then format, without dropping a step or a detail of the original instruction. With its million-token context, you can hand it an entire file, brand guide, examples, constraints, and ask for one thing at the end.
GPT-6 Astra, GPT-5.5 or Claude Fable 5.1?
GPT-5.5 remains the family's most cost-effective generalist: same context, identical answer style, four times cheaper, and a close level on most requests. Take it by default and switch to Astra when the result disappoints on a long task or a multi-step reasoning.
Claude Fable 5.1, released four days earlier, is its direct competitor at the same price: it follows a long brief to the letter and keeps every constraint in mind from start to finish. On brand copy where every word counts, many prefer Claude; on research and project structuring, Astra. Both sit on the same canvas with the same credits: the simplest move is to send the same instruction to both and keep the better answer.
GPT-6 Astra next to its closest siblings
Figures pulled from the same registry as billing: when a price or a cap changes, this table changes with it.
| GPT-6 Astra | Claude Fable 5.1 | GPT-5.5 | |
|---|---|---|---|
| Base price | 12 credit(s) / message | 12 credit(s) / message | 7 credit(s) / message |
How to use it on Imaginode
- 1Add a Text node and pick GPT-6 Astra in the selector.
- 2Give your instruction; wire in other texts or images to analyze.
- 3The result feeds your connected Image and Video nodes directly.
Frequently asked questions
Do I need a ChatGPT subscription to use GPT-6 Astra on Imaginode?
No. GPT-6 Astra is available with an Imaginode account and credits, paid per message, with no ChatGPT subscription and no OpenAI API key. The price appears on the button before every send.
Does GPT-6 Astra read images and files?
Yes. It accepts text, images and PDFs as input. On the canvas, connect an Image or Media node to the Text node: the image travels with your instruction, for a description, an analysis or a rewrite as a prompt.
Can I call GPT-6 Astra through Imaginode's API or MCP server?
Yes. The public REST API and the MCP server expose the same catalogue as the canvas, GPT-6 Astra included, with the same credits and the same per-message billing.
How much does a message sent to GPT-6 Astra cost?
Around 12 credit(s) per message, that is $0.14 (1 credit = $0.012). The cost shows before sending, with no separate subscription and no API key to manage: the same credits pay for all 88 models in the catalog.
Do I need a separate subscription to use GPT-6 Astra?
No: GPT-6 Astra is included in Imaginode, with no API key and no account with the provider. A single credit balance covers all 88 models, text, image, video and voice, and also powers the assistant that builds complete workflows.
Can I try GPT-6 Astra for free?
Yes: signing up grants trial credits, no credit card required, and those credits never expire. Enough to test GPT-6 Astra in real conditions before deciding on a plan or a top-up.
Do I need to install anything to use GPT-6 Astra?
No: GPT-6 Astra runs server-side, in the browser, mobile included. Imaginode's node canvas wires its renders to the other models (references, camera, styles) with nothing to install.
GPT-6 Astra at the competition
GPT-6 Astra or its variants are also available at ChatGPT (images). Pricing grid recorded on a given date, sources cited: the comparison details what credit-based billing changes.
Read the Imaginode vs ChatGPT (images) comparison →
Try GPT-6 Astra on a real canvas
88 models, one account, credits that work everywhere. The price always shows before you generate.
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