Musk, Grok 4.8 rated poorly… Opus 5.5 praised as a 'masterpiece'
Original headline머스크, 그록 4.8 열세 평가…오퍼스 5.5는 ‘걸작’ 호평
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Elon Musk said on March 10 that xAI's Grok 4.8 is not as good as Anthropic's Claude Opus 5.5, calling the latter a "masterpiece" in a reply on X, though he disclosed neither the tests nor the scores behind the comparison. In a separate post the same day, Musk said Grok 4.8 has finished pretraining and is now in reinforcement learning, with the company reportedly planning limited testing during that phase. The remarks matter because they set expectations for xAI's next model release against Anthropic's flagship, and because pretraining-to-reinforcement-learning transitions are the stage where benchmark results typically begin to surface. What to watch next is the limited test results for Grok 4.8 and whether they substantiate or contradict Musk's own assessment.
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Named in this story
Grok 4.8, Elon Musk, Claude Opus 5.5, X, SpaceX (SPCX)
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