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  "path": "/anthropic-launches-claude-opus-4-8-and-new-effort-selector/",
  "publishedAt": "2026-05-29T10:09:51.000Z",
  "site": "https://www.testingcatalog.com",
  "tags": [
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  "textContent": "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.",
  "title": "Anthropic launches Claude Opus 4.8 and new effort selector"
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