In the FrontierCode 2.0 benchmark, which evaluates models on real‑world engineering tasks, Fable 5.2 achieved the highest weighted score of 49.1%, up from Fable 5.1’s 32.4% and ahead of Opus 5.5’s 45.5%.
At low reasoning effort, Fable 5.2 surpasses the best result of Fable 5.1 while spending less than a third of the cost per task, based on list API pricing and public discounts.
Solutions that fail blocking criteria receive a score of zero, according to the benchmark methodology.
Sources
Fan coverage from Devin Central — not an official Cognition announcement. Devin is a trademark of Cognition.