Models & compute
May 2026
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Model releases In the briefing →
Anthropic — Claude Opus 4.8 GA: SWE-bench Pro 69.2% (up from 64.3%), USAMO 96.7% (vs 69.3% for 4.7), GDPval-AA 1890 (121 Elo ahead of GPT-5.5); pricing identical to 4.7; fast mode is now 3× cheaper at 2.5× speed; only model to complete every case end-to-end on the Super-Agent benchmark. (source)
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Model releases In the briefing →
Anthropic — Opus 4.8 is ~4× less likely than 4.7 to silently pass code it knows is flawed — the headline honesty improvement in the release. (source)