Anthropic launches Claude Opus 4.8 and new effort selector

· TestingCatalog ·

Anthropic released Claude Opus 4.8 with coding, reasoning, agentic skill, fast-mode, and self-checking improvements.

Categories: Model Releases

Excerpt

What's new? Anthropic released Claude Opus 4.8 with coding, reasoning, agentic skill upgrades, and self-checks; Fast mode runs 2.5x faster at one-third cost; New effort control on Claude and parallel workflows in Claude Code.