The company said the model was evaluated on an internal cyber benchmark comprising 25 repositories across C, Python, Go, PHP and TypeScript, each pinned to a commit with known vulnerabilities.
On the benchmark, Mythos 5.2 achieved an F2 score of 73.5, up from 56.9 for Mythos 5.1 and more than double Claude Opus 5.5’s 32.7. The score reflects recall‑weighted precision across 1,781 reported bugs.
Cognition also said it will provide hundreds of millions of dollars in Devin credits, allowing current and future enterprise customers to run free scans with frontier cyber models, including Mythos 5.2, subject to eligibility criteria.
Sources
Fan coverage from Devin Central — not an official Cognition announcement. Devin is a trademark of Cognition.