GPT-6 ASTRA · USE IT NOW · VERIFIED SEPTEMBER 7, 2026

Astra is here. Here is how to use it.

GPT-6 Astra is available through multiple documented routes. Start with the one that matches your plan, client, workflow, and budget.

ChatGPT access Work / Codex API docs

Independent reporting. Primary sources. Clear boundaries.

RELEASED · ACCESS EXPANDING

Use GPT-6 Astra through the route that fits.

Astra is available through multiple documented routes. ChatGPT, Work, Codex, API, Copilot, Foundry, and third-party catalog access each have their own plan, account, client, or provider rules.

A route listing is not a promise that your account, plan, workspace, or region is eligible.

Check your Astra route See how to start

Official routes lead. Third-party routes are labeled separately.

The provider relationships below are shown beside each action. Affiliate links are marked sponsored. HowToUseAstra may earn a commission if you purchase through this link. Affiliate relationships do not change our editorial ranking.

OpenAI ChatGPT Check ChatGPT terms GPT-6 Pro / Astra in Pro, Business, and Enterprise Chat plans where enabled. OpenAI Work / Codex Check Work and Codex Plus, Pro, Business, and Enterprise as rollout reaches each account; Codex CLI 0.153.0+ is required. OpenAI API Open model docs The canonical gpt-6-astra model ID and Responses API route. GitHub Copilot Check Copilot support GPT-6 Astra is listed as GA in the supported-model catalog. Microsoft Foundry Open Foundry route Microsoft currently marks the Astra Foundry route generally available. Browse Astra on Krater Open Krater catalog Krater lists Astra and Astra Pro; this approved tracked link opens its all-model catalog because no Astra-specific destination is configured.

Krater is an independent third-party catalog. Its listing is evidence of what Krater says it offers, not OpenAI endorsement or proof that its route has the same API, limits, price, or account access as OpenAI direct.

START WITH THE ANSWER YOU CAME FOR

The short route through the launch.

Access, implementation, cost, and safety are separate decisions. Pick the one you need to make first.

ACCESS

Can I use Astra today?

Astra is available through multiple documented routes; account, plan, client, workspace, and provider eligibility still varies.

Check eligibility BUILD

What do I put in the API call?

Use gpt-6-astra with the Responses API. Start with a server-side key and a bounded task.

Open the API guide BUDGET

What does Astra cost?

$10/M input · $1/M cached · $50/M output.

See the rate card SAFETY

What should I read first?

The system card explains evaluations, safeguards, deployment context, and limitations.

Read the system-card guide

Astra’s ten research results, explained

AVAILABILITY

Where can I actually use Astra?

Release, account eligibility, product plans, and API access are different signals. Keep them separate.

Public access Released September 3, 2026; access is rolling out in stages.

ChatGPT GPT-6 Pro, powered by GPT-6 Astra, is rolling out in ChatGPT for Pro $100, Pro $200, Business, and Enterprise. Plus plans include Astra in ChatGPT Work and Codex as it rolls out; availability can differ between Chat, Work, and Codex.

API The OpenAI API documents gpt-6-astra; access is rolling out through Trusted Access and eligible accounts rather than being universal by default.

Pricing $10 / 1M input tokens; $1 / 1M cached input tokens; $12.50 / 1M cache-write tokens; $50 / 1M output tokens.

Release date September 3, 2026 (released; routes expanding)

Last verified September 7, 2026

Market signal: October 31 98.85% market-implied · observed September 3, 2026 · see the release-odds tracker and read the source ledger.

Open the availability tracker Read Astra news

WHEN ANOTHER MODEL FITS BETTER

Choose by the work in front of you.

WHEN ANOTHER MODEL FITS BETTER

Choose by the job, not by the release headline.

Astra is the primary route. Use another model only when its workflow, access, or economics are a better fit.

Stay in OpenAI's ecosystem

GPT-5.6 Sol

The most direct stepping stone if your target is OpenAI’s tooling, model naming, and developer workflow.

Why it fits: Krater’s current catalog lists GPT-5.6 Sol and its model page describes complex reasoning, coding, and agentic workflows.
Honest limit: It is GPT-5.6 Sol, not GPT-6 Astra. Similar lineage does not establish Astra-level capability, access, or pricing.

GPT-5.6 Sol on Krater Model page

Hardest single-model work

Claude Fable 5.1

A strong candidate when the job is difficult coding, research, knowledge work, or a long-running agent task.

Why it fits: Anthropic describes Fable 5.1 as its most capable generally available model for demanding reasoning and long-horizon agentic work, and Krater lists it in the current catalog.
Honest limit: It is Anthropic’s model, not GPT-6 Astra. Safeguards, plan limits, retention, and actual task performance still need to be checked for your use case.

Claude Fable 5.1 on Krater Model page

Several models checking

Fusion

A different answer to uncertainty: ask several models to analyze in parallel, then use synthesis instead of relying on one model.

Why it fits: Krater’s model page describes Fusion as a small multi-model deliberation that analyzes a prompt in parallel with web search and fetch enabled.
Honest limit: Fusion is a Krater product, not itself a frontier model and not GPT-6 Astra. The page does not prove that it is OpenRouter Fusion.

Fusion on Krater Model page

These are alternatives, not Astra. Their product terms and capabilities remain separate.

HowToUseAstra may earn a commission if you purchase through this link. It does not affect our recommendations.

PRODUCT SOURCES

Product claims stay beside the action so the comparison remains inspectable.

NEWS

What changed this week.

New claims get a date, a status, and a source before they become part of the launch record.

August 26, 2026

OpenAI publishes the Hugging Face incident account and the road ahead

OpenAI says the July incident involved an internal-only research model comparable in scale to GPT-5.6 Sol, not Astra. Separately, it says the capabilities of its upcoming Astra model are prompting stronger safeguards across the model lifecycle, including more isolated sandboxes, restricted internet access, tighter control of model weights, and expanded chain-of-thought monitoring. The September 1 update is the newer record for Astra’s current threshold and availability posture.

Read the record

September 3, 2026

OpenAI releases GPT-6 Astra; access routes expand

OpenAI publishes its GPT-6 Astra safety overview, model documentation, and system card. The model page names gpt-6-astra, lists API pricing and limits, and the current product/provider record now spans several routes with separate eligibility rules.

Read the record

September 1, 2026

OpenAI says Astra meets the Critical cybersecurity threshold and will be available soon

OpenAI says Astra meets its Critical cybersecurity capability threshold, reports 100% on ExploitBench and two zero-days during its evaluation, and says a system card will accompany launch. It describes access as coming soon rather than giving an exact date; the published results reflect Daybreak Blue access, not default production behavior.

Read the record

Open Astra news

PRIMARY SOURCES

Start with the documents behind the record.

Read the model docs ↗, the safety overview ↗, and the original announcement ↗.

ASTRA UPDATES

Keep the useful Astra updates coming

We’ll send occasional source-backed updates as access, pricing, and real-world tests change. This is an independent list, not an OpenAI waitlist.