Capability gains

Anthropic releases Claude 3 Opus and Sonnet

Anthropic released Claude 3 Opus and Sonnet through Claude, its generally available API and selected cloud platforms, adding stronger reasoning, vision, long-context processing and support for complex automated work.

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CURRENT ASSESSMENT · REVISION 1
TOWARD DOOM67confidence 98/100

Why it moved the index

Two frontier models combined stronger reasoning, vision and long-context handling with immediate API access and explicit support for automation across APIs and databases.

AUDIT TRAIL

Assessment history

  1. R1
    Toward 67 · confidence 98

    New March 2024 exact frontier model release and deployment.

    12 Aug 2026
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  1. DoomBench assesses “Anthropic releases Claude 3 Opus and Sonnet” as evidence moving toward doom, with magnitude 67 and confidence 98 out of 100 in the capability gains category.

  2. The DoomBench assessment of “Anthropic releases Claude 3 Opus and Sonnet” is based on reporting from Anthropic and records the editorial rationale, source quality, attribution, and revision history.

  3. DoomBench summarizes “Anthropic releases Claude 3 Opus and Sonnet” as follows: Anthropic released Claude 3 Opus and Sonnet through Claude, its generally available API and selected cloud platforms, adding stronger reasoning, vision,...

    https://www.doombench.com/news/anthropic-releases-claude-3-opus-and-sonnet-2024-03-04