Claude Opus - Claude Code Blog

Haiku, Sonnet, Opus, and now Fable — Anthropic ships four tiers, and picking the wrong one either burns money or fumbles the task. Here's a practical map of the lineup, what each model is for, and how to route work between them.

Claude Opus 4.8 pushes the autonomous horizon from an hour to a workday, tightens subagent coordination, and ships meaningful gains on cost-per-task. Here's what's actually different, what to do with it, and where it still falls short.

Claude Opus 4.7 is here, building on the 1M token context window with sharper reasoning, better tool orchestration, and tighter agentic workflows. Here's what's new, what's genuinely better, and how to put it to work.

Claude Opus 4.6 brings a 1 million token context window, multi-platform Claude Code availability, fast mode, and background agents. Here's what these changes mean for how you build software with AI in 2026.