Copilot Fusion: How GitHub Picks AI Models for You, and How It Compares With Claude Code
GitHub’s Copilot Fusion routes coding tasks across models by effort level. It scored 60 vs. Claude Code’s 62 at about half the cost per task.
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Claude Opus 5.5 vs Sonnet 5.5: Twice the Price, but How Big Is the Gap?
Claude Opus 5.5 costs twice as much as Sonnet 5.5, but the benchmark gap is small. Sonnet wins on speed and cost; Opus pulls ahead on hard reasoning and system design.
