GPT-6 Sol was released by OpenAI on September 22, 2026, as a flagship model in the GPT line.
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
Scores 1 point higher on the all-round intelligence index
Artificial Analysis Intelligence Index v4.3.2 — one score averaging 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
Every Monday, only when something shipped: the AI models that came out, what each one changed, and which lines are due next.
We email you a link to confirm first · unsubscribe anytime · read past issues · about the newsletter · RSS for the GPT line
GPT-6.1 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.
Latest: GPT-6.1 Sol · Sep 29, 2026
Newest first. See the full line with every card →