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Reasoning ModelResearch dossier

GPT-6 Astra

An OpenAI model for teams evaluating demanding reasoning and agent workflows.

Astra is a model; ChatGPT is an application. Model specifications do not establish a subscription’s limits or your account’s access.

First releasedDocumented by September 7, 2026
CompanyOpenAI
Best forComplex coding, research and multi-step agent work with a configurable model
PricingAPI / 1M tokens: $10 input, $1 cached input, $50 output; long-context/tool charges extra
01 / OVERVIEW

What GPT-6 Astra is today

Use this dossier to decide what to test before adopting Astra. Start with tasks where your existing system needs substantial correction, then compare the cost and quality of completed work.

The specification is useful for planning input size and output requirements. It does not establish accuracy on your documents, repository or research questions.

Reading note

Product features and underlying models are documented separately. Roadmap items include only provider-announced work; rumors are excluded.

02 / RELEASE HISTORY

Major versions and what changed

Selected milestones that materially changed the product.

1 milestones
Current

Astra added to the Aivorix catalog

Documentation reviewed; this date records our coverage rather than an independently confirmed launch date.

  • Dedicated model profile
  • Upgrade comparison with GPT-5.6 Sol
Official release note
03 / THEN VS NOW

GPT-5.6 Sol to Astra: documented specifications

The comparison uses provider-published capabilities and named evaluations, not a generic marketing score.

DimensionPreviousCurrentMeasured difference
Input / output price per 1M tokens$4 / $20$10 / $502.5× standard token rates; total task cost varies
Context window1.05M tokens1.05M tokensSame published capacity
Maximum output128K tokens128K tokensSame published limit
04 / POWER EVIDENCE

Published specifications, with benchmark gaps visible

The homepage now includes provider-published Astra benchmark results alongside a separate feature-coverage ranking. Benchmark scores retain their evaluation and model settings.

05 / FEATURES EXPLAINED

How the important features work

What happens behind the button, where it helps and what to verify.

01

Asynchronous tools

Application integration required

How it works: The model can continue independent work while a tool is pending.

Best use: Workflows with slow external operations.

Watch: Your application remains responsible for execution and result handling.

02

Mid-turn steering

Responses API over WebSocket

How it works: Additional instructions can redirect ongoing work.

Best use: Changing requirements during a long task.

Watch: Validate that completed work remains consistent with the new request.

03

Reasoning controls

low through max

How it works: Choose the reasoning effort for the task.

Best use: Testing quality and latency tradeoffs.

Watch: Astra does not offer the none setting.

LIMITS

What the headline features do not guarantee

  • Specifications are not a guarantee of task accuracy.
  • Budget for review, retries and enabled tools.
  • Confirm current access and billing in your account.
06 / WHAT'S NEXT

Announced roadmap, without speculation

Status reflects the provider's latest public wording. “No public date” means there is no verified launch schedule.

No public date

Future releases and access

This dossier does not infer a future release schedule. Check current model documentation before rollout.

Official announcement
07 / SOURCES

Primary sources

Provider announcements, help documentation and system information.

4 references
  1. 1
    Astra published evaluation tables

    OpenAI · Reviewed September 7, 2026

  2. 2
    Astra model specification

    OpenAI · Reviewed September 7, 2026

  3. 3
    Astra workflow guidance

    OpenAI · Reviewed September 7, 2026

  4. 4
    Model comparison

    OpenAI · Reviewed September 7, 2026

Last editorial verification: 2026-09-07. Prices, access limits, preview status and model routing can change after this date.