September 26, 2026 · 5 min read
Claude Opus 5.5, explained for web developers
Anthropic's Claude Opus 5.5 is cheaper per token than Opus 5 and now the default in Claude Code. What changed, how it scores on coding benchmarks, why verbosity eats part of the saving, and the claude.ai speed-up post that is the real frontend lesson of the week.



