Changes from previous version
Meaningful benchmark lift over Opus 4.7 on coding and agentic suites; introduces effort controls, Claude Code dynamic workflows, and a cheaper fast mode at 2.5x speed.
Release Summary
Upgrade to Anthropic's Opus class with stronger performance across coding, agentic tasks, and professional work, plus improved consistency for long-running tasks. Adds effort control in claude.ai and Cowork, dynamic workflows in Claude Code (research preview) for large parallel subagent runs, and fast mode at 2.5x speed with pricing three times lower than on prior Opus models. Same standard API pricing as Opus 4.7 ($5/M input, $25/M output). Available via Claude API as claude-opus-4-8.
Timeline
Claude Opus 4.8 released
Anthropic releases Opus 4.8 with benchmark gains over Opus 4.7, effort controls, dynamic workflows in Claude Code, and cheaper fast mode.