Sottiaux described GPT-6.1 Sol as “our most demanded model pretty much ever” across both the API and subscriptions. Earlier testing by Vals AI found it ran two to three times slower than GPT-6 Sol on tasks performed by AI agents, taking about 75 minutes per Vibe Code Bench task and 43 minutes per Legal Agent task.
Launched Sept. 29, GPT-6.1 Sol costs $2 per million input tokens and $10 per million output tokens, one-fifth of Astra's standard prices. It scored one point below GPT-6 Astra on the Artificial Analysis Intelligence Index, while costing $0.72 per task at maximum reasoning effort versus Astra's $3.26. Cached input costs $0.10 per million tokens, half the price for GPT-6 Sol.