GPT-6 Sol

OpenAI · GPT line · flagship

Released September 22, 2026Latest in the line

What changed

Half the price of GPT-5.6 Sol with about half as many factual mistakes, while its all-round score rises only one point.

Compared with GPT-5.6 Sol · the model it replaces

Makes about half as many factual mistakes

OpenAI factuality test — errors in real-world conversations

about half

vs GPT-5.6 Sol · OpenAI internal test

One point higher on the all-round score

Artificial Analysis Intelligence Index — average of 10 hard tests

48

up from 47 · +1 point

Costs half as much as the model it replaces

Price per 1M tokens — what developers pay, input / output

$2 / $10

down from $4 / $20 · 50% cheaper

Where the GPT line stands

GPT-6 Sol is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

GPT-6 Sol

OpenAI · GPT line · flagship
Just releasedreleased 1 day ago — usual gap is ~56
Released Sep 22, 2026 · what changed →
Days since last release
GPT-6 Sol · Sep 22, 2026
1
days
Usual gap
56
days
Recent gaps
GPT-6 Astra · Sep 2026
19
GPT-5.6 Sol · Jul 2026
56
GPT-5.5 · Apr 2026
77
GPT-5.4 · Mar 2026
49

Every GPT release

Newest first. See the full line with every card →

  1. Sep 22, 2026GPT-6 Sol · this page
  2. Sep 3, 2026GPT-6 Astra
  3. Jul 9, 2026GPT-5.6 Sol
  4. Apr 23, 2026GPT-5.5
  5. Mar 5, 2026GPT-5.4
  6. Dec 11, 2025GPT-5.2
  7. Nov 12, 2025GPT-5.1
  8. Aug 7, 2025GPT-5
  9. Apr 16, 2025o3
  10. Apr 14, 2025GPT-4.1
  11. Dec 5, 2024o1
  12. May 13, 2024GPT-4o
  13. Nov 6, 2023GPT-4 Turbo
  14. Mar 14, 2023GPT-4
  15. Nov 30, 2022GPT-3.5
  16. Jun 11, 2020GPT-3

Get the weekly drop

One email a week: what AI models shipped, the actual differences vs the previous version, and what's coming next. No filler.