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Cognition ships Fusion: frontier lead + cheap sidekick for Devin

Devin’s Fusion harness (now in Desktop and CLI) pairs a frontier “lead” for planning and review with a cheaper “sidekick” for execution—Fable 5.1 + SWE-2 is the recommended combo—matching Claude Code or Codex-level scores at up to ~39% lower cost across coding benchmarks.

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GitHub Octoverse 2026: agents drafted over 40% of pull requests in September, up from 17% in March

Published Oct 28, the report counts about 110 million agent started PRs in September (roughly 6x March), with 90% of agent involved PRs merging within two weeks versus about 86% for the rest; GitHub calls its agent count a floor since it only sees detectable agent activity. New repos with an agent config file averaged eight times the commits of those without one (Octoverse)…

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