马斯克的Grok 2开源了，但好像又没完全开

Core Insights - Elon Musk announced the open-sourcing of Grok 2, with Grok 3 expected to be open-sourced in six months [2][15] - Grok 2's model weight files total 500GB and are available on Hugging Face [3] - Grok 2 has seen a decline in its performance ranking, now sitting at 68th in the Elo ranking and 75th in the Arena comprehensive ranking [10][14] Open Source Details - Grok 2 is released under a unique Grok 2 Community License, which restricts its use to non-commercial and research purposes, prohibiting its use for training or improving other AI models [9] - Developers must label any distributed materials as "powered by xAI" [9] Performance Metrics - Grok 2's Elo score has dropped to 1306, while the newly released Grok 4 has an Elo score of 1433, ranking second overall [12] - In the Arena ranking, Grok 2 is now at 75th place, with Grok 4 at 12th place [14] Market Context - The AI large model market has seen significant changes over the past year, with Grok 2's performance not being competitive compared to newer models [15] - The timing of Grok 2's open-source release may serve to maintain public interest in the Grok series and fulfill Musk's previous commitments [15]