Cognition announced on September 22, 2026, that OpenAI's GPT-6 Sol and GPT-6 Luna models are now available in Devin Desktop and Devin CLI.
In Cognition's proprietary FrontierCode 1.1 benchmark, which grades models on real-world engineering tasks by quality and mergeability, GPT-6 Sol matches GPT-5.6 Sol's score at 61% lower cost per task and lands within four points of GPT-6 Astra at less than half its cost. GPT-6 Luna scores above GPT-5.6 Luna at approximately a quarter of the cost; Cognition reports it at under $0.10 per task, the lowest on its FrontierCode leaderboard.
Cognition also states that GPT-6 Sol reads roughly 17% less context than GPT-5.6 Sol to reach the same score and rarely leaves a repository with failing tests after its final edit. For GPT-6 Luna, Cognition highlights gains at low and medium reasoning effort, noting the model writes real regression tests rather than mock-based ones.
All performance and cost figures cited above come from Cognition's own FrontierCode 1.1 evaluation. The announcement confirms availability within Cognition's Devin products; no information was provided in the source regarding broader platform availability, API access, or independent third-party benchmarking.