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Last Week in AI · Apr 23, 2026
#241 - Opus 4.7, Muse Spark, GPT-5.4-Cyber, HY-World 2.0
“Hired from XAI after building Colossus supercomputer in 120 days; previously at OpenAI”
Claude Opus 4.7 Release and CapabilitiesMeta Muse Spark Model DevelopmentOpenAI GPT-5.4-Cyber Cybersecurity Variant
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