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The Who's Who of AI

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New Safety & security Development 2h ago
⚡ 3 h early
Anthropic Claude Opus 5.5 launch

Introducing Claude Opus 5.5

6 experts across 4 network communities independently surfaced this.

Why this matches Building & implementation reaction 1 attributable expert contribution · Stephen Turner
“"Because Opus 5.5 is comparable to Claude Mythos 5.1 in biology and cybersecurity, we’re deploying it with safeguards similar to those on Claude Fable 5.1." www.anthropic.com/claude-opus-...” evidence ↗
6 experts 4 communities 1 sources clustered
Tim Kellogg Sung Kim Scott McGrath Stephen Turner Max Woolf Fran Litterio

“"Because Opus 5.5 is comparable to Claude Mythos 5.1 in biology and cybersecurity, we’re deploying it with safeguards similar to those on Claude Fable 5.1." www.anthropic.com/claude-opus-...”

“Opus 5.5 better and cheaper than Opus 5 — typically 40% cheaper, $4/mtok input, $20/mtok out www.anthropic.com/claude-opus-...”

3 experts discussed this · 14 posts
Tim Kellogg: Opus 5.5 better and cheaper than Opus 5 — typically 40% cheaper, $4/mtok input, $20/mtok out www.anthropic.com/claude-opus-...
Tim Kellogg: Sonnet 5.5 & Haiku 5.5 coming soon
Tim Kellogg: it writes fine
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Primary source anthropic.com ↗