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.
Every GPT release
Newest first. See the full line with every card →
- Sep 22, 2026GPT-6 Sol · this page
- Sep 3, 2026GPT-6 Astra
- Jul 9, 2026GPT-5.6 Sol
- Apr 23, 2026GPT-5.5
- Mar 5, 2026GPT-5.4
- Dec 11, 2025GPT-5.2
- Nov 12, 2025GPT-5.1
- Aug 7, 2025GPT-5
- Apr 16, 2025o3
- Apr 14, 2025GPT-4.1
- Dec 5, 2024o1
- May 13, 2024GPT-4o
- Nov 6, 2023GPT-4 Turbo
- Mar 14, 2023GPT-4
- Nov 30, 2022GPT-3.5
- Jun 11, 2020GPT-3
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