ℏεsam(@Hesamation):BRO WHAT?! &gt; #1 on the Intelligence Index &gt; +5 freaking points higher than Astra &gt; AND it costs ~40% less to run than Opus 5. &gt; tested by METR this is their first model since calling for “pacing” the frontier.

2026.09.22 16:54

BRO WHAT?! > #1# on the Intelligence Index > +5 freaking points higher than Astra > AND it costs ~40% less to run than Opus 5. > tested by METR this is their first model since calling for “pacing” the frontier.

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Claude@claudeai

2026.09.22 16:31

Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.