›Released: May 28, 2026 — source: anthropic.com/news/claude-opus-4-8
›Model ID: claude-opus-4-8 — available via API, Claude.ai Pro, Team, and Enterprise
›Improved reasoning and coding benchmarks over Opus 4.7; sharper judgment on agentic tasks
›Fast mode: 2.5× speed at 3× lower cost than previous fast mode
›Dynamic Workflows in Claude Code (research preview): plan and run hundreds of parallel subagents in one session
›Standard pricing: $5 / MTok input, $25 / MTok output
›— WHAT'S NEXT (from same post) —
›Claude Mythos: "a new class of model with even higher intelligence than Opus"
›Project Glasswing: small number of cybersecurity orgs using Mythos Preview now
›Cyber safeguards required before GA — Anthropic confirms "swift progress"
›Mythos-class GA expected "in the coming weeks" per the Opus 4.8 post
›Source: anthropic.com/news/claude-opus-4-8