OpenAI: Plus & Pro reasoning model upgraded to GPT-6 Astra
What happened
Between the Aug 31, 2026 and Sep 7, 2026 captures of OpenAI's pricing page, Pulse recorded one change: Plus/Pro flagship reasoning model upgraded from GPT-5.6 Sol Pro to GPT-6 Astra; Plus bullet now reads "Advanced reasoning models with GPT-6 Astra and GPT-5.6", Pro now reads "Pro reasoning powered by GPT-6 Astra". In detail: OpenAI upgraded the flagship reasoning model backing Plus and Pro from GPT-5.6 Sol/Sol Pro to GPT-6 Astra: Plus now lists 'Advanced reasoning models with GPT-6 Astra and GPT-5.6' and Pro's headline reasoning benefit is now 'Pro reasoning powered by GPT-6 Astra'. Pulse files it as a product change (feature change) with a neutral direction. Pulse's latest capture (Oct 18, 2026) lists Go at $8, Plus at $20, Business at $20 and Pro at $100.
It lands one day after OpenAI's previous change, "OpenAI swaps chatbot taglines from benefits to outcomes, prices untouched" (Sep 6, 2026). Before that Pulse recorded "OpenAI quietly drops 20x usage option from Pro, rewrites plan taglines" (Sep 11, 2026), "OpenAI revamps ChatGPT plan taglines, pivots from use-cases to intelligence" (Sep 3, 2026) and "OpenAI API Business: new $100/mo Premium seat tier + 200-employee cap" (Aug 31, 2026). OpenAI has been tracked since 2023-11-14.
In the same window Google, Microsoft, X, Metabase and Mistral AI also changed their AI & Machine Learning pricing pages. Those moves are listed further down, and the Pulse Agent can compare them side by side.
- Plus, Pro · FeatureChangedGPT-5.6 Sol/Sol ProGPT-6 Astra
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| Plus, Pro | Feature | GPT-5.6 Sol/Sol Pro | GPT-6 Astra | Changed |
Values as written on OpenAI's public pricing page in the two captures Pulse compared; where the page states no number, the cells give the wording before and after.
Evidence
The two captures Pulse comparedFull-page captures of OpenAI's pricing page (openai.com) from Aug 31, 2026 and Sep 7, 2026; the change is marked near the top of the page, where "GPT-5.6 Sol/Sol Pro" becomes "GPT-6 Astra".
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The two full-page captures with this change marked up are free with an account.
OpenAI, the last 90 days
Full history- Sep 20, 2026packagingOpenAI refreshes ChatGPT plan taglines across Free, Go, Plus, Pro
- Sep 16, 2026packagingOpenAI reframes ChatGPT plan taglines around use-cases, not capabilities
- Sep 11, 2026packagingOpenAI quietly drops 20x usage option from Pro, rewrites plan taglines
- Sep 7, 2026improvedOpenAI: Plus & Pro reasoning model upgraded to GPT-6 Astra · this change
- Sep 6, 2026packagingOpenAI swaps chatbot taglines from benefits to outcomes, prices untouched
- Sep 3, 2026packagingOpenAI revamps ChatGPT plan taglines, pivots from use-cases to intelligence
- Aug 31, 2026packagingOpenAI API Business: new $100/mo Premium seat tier + 200-employee cap
- Jul 25, 2026packagingOpenAI: ChatGPT plan taglines reframed to 'Best for X' audience framing
Across AI & Machine Learning in the same window
All AI & Machine Learning changes- GoogleSep 7Google Workspace: promo discount cut from 50% to 30%/20% off
- MicrosoftAug 31Microsoft Speech: Voice Live Pro Cached Input $40→$0.40; GPT Realtime 2 added
- XAug 24X drops grok-4.5, adds Imagine image/video models and free Playground perk
- MetabaseAug 24Metabase quietly reveals Enterprise-only paid air-gapped deployment option
- Mistral AIAug 17Mistral AI folds Education into Pro, adds bundled API credits to entry plans
Questions about this change
Did OpenAI raise prices in September 2026?
No list-price increase was recorded between Aug 31, 2026 and Sep 7, 2026. The change Pulse detected was a product change: feature change.
What changed on OpenAI's pricing page between Aug 31, 2026 and Sep 7, 2026?
Plus, Pro feature: GPT-5.6 Sol/Sol Pro → GPT-6 Astra, changed. Pulse compared the captures it took on Aug 31, 2026 and Sep 7, 2026; the before/after table above lists each item as written on the page.
How often does OpenAI change its pricing?
Pulse recorded 4 other pricing-page changes for OpenAI in the 90 days before this one; the previous change was "OpenAI swaps chatbot taglines from benefits to outcomes, prices untouched" on Sep 6, 2026; OpenAI has been tracked since 2023-11-14.