Elon Musk says Grok 4.5 is now in private beta, claims performance near or above Anthropic's Opus
Musk claims Grok 4.5 in beta approaching Anthropic Opus performance on benchmarks.
“Musk said reinforcement learning is continuing to improve the model and that "Grok Build," xAI's coding-agent harness, is being refined daily. He framed the SpaceX…”
Why it matters
Weekly Silicon's editorial model scored this 3.40/10 overall, reading it above all as an industry story with cross-cutting implications. Its strongest dimension is regional relevance at 6/10 — direct impact on US technology hubs rather than a purely overseas development — with technology breakthrough close behind at 4/10, pointing to a genuine capability or engineering advance rather than a routine product update. The impact is global rather than tied to one US hub, so the thing to watch is how it filters into domestic supply chains and hiring.
Derived from the AI score breakdown below.
AI score breakdown
A composite of 3.40/10 put this story at #10 for Monday, June 29, 2026, driven mostly by regional relevance (6/10) and technology breakthrough (4/10).
Composite is the weighted sum of the five dimensions. How scoring works →
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