# GPT-6 Sol and GPT-6 Luna are now available in Devin By Steven Van · 2026-09-22 Both OpenAI models are live in Devin Desktop and CLI, with Luna coming in under $0.10 per task on Devin's FrontierCode 1.1 benchmark. OpenAI's GPT-6 Sol and GPT-6 Luna are now live in [Devin]() Desktop and Devin CLI, [according to Devin's announcement](). ## Benchmark results Devin's numbers come from FrontierCode 1.1, its proprietary benchmark that grades models on real-world engineering tasks based on quality and mergeability. - **GPT-6 Sol** matches GPT-5.6 Sol's score at 61% lower cost per task. It lands within four points of GPT-6 Astra at less than half its cost. - **GPT-6 Luna** scores above GPT-5.6 Luna at about a quarter of the cost. At under **$0.10** per task, it is the cheapest model on the leaderboard. ## How the models work Devin says the gains show up in behaviour as well as cost. In its evaluations, GPT-6 Sol reads about 17% less context than GPT-5.6 Sol to reach the same score, and rarely leaves a repo with failing tests after its last edit. GPT-6 Luna's biggest gains come at low and medium reasoning effort, where it writes real regression tests instead of mock-based ones. The models are listed on Devin's FrontierCode leaderboard alongside Opus 5.5, GPT-6 Astra, SWE-2 and the GPT-5.6 models. [![]()]() ![Devin]() Devin AI software engineering agent for building features, fixing bugs, reviewing code, and handling work across repositories. [View Devin →]() Sources [Original source]() [Read GPT-6 Sol and GPT-6 Luna are now available in Devin on Creators Toolbox]() --- Canonical source: https://creatorstoolbox.com/blog/devin-gpt-6-sol-and-gpt-6-luna-are-now-available-in-devin