Claude Opus 4.8 extends long-running and multi-agent work
Anthropic released Claude Opus 4.8 globally with stronger agentic and computer-use performance plus dynamic workflows capable of coordinating hundreds of parallel subagents.
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Why it moved the index
The release improved unattended tool use, computer use, and long-running coordination while making codebase-scale work by hundreds of subagents available to paying users.
Assessment history
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R1
Toward 70 · confidence 98
New historical launch story for an already authoritative exact-version model record.
11 Aug 2026
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DoomBench assesses “Claude Opus 4.8 extends long-running and multi-agent work” as evidence moving toward doom, with magnitude 70 and confidence 98 out of 100 in the autonomy and agency category.
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The DoomBench assessment of “Claude Opus 4.8 extends long-running and multi-agent work” is based on reporting from Anthropic and records the editorial rationale, source quality, attribution, and revision history.
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DoomBench summarizes “Claude Opus 4.8 extends long-running and multi-agent work” as follows: Anthropic released Claude Opus 4.8 globally with stronger agentic and computer-use performance plus dynamic workflows capable of coordinating...
https://www.doombench.com/news/claude-opus-4-8-extends-long-running-and-multi-agent-work-2026-05-28