Musk Directs Tesla Staff to Adopt xAI's Grok Model

LMArena, the company behind a popular AI model leaderboard, raised $200 million in a funding round led by Lightspeed and Khosla Ventures, nearly doubling its valuation to $3.1 billion in 10 months. The company is expanding its leaderboard methodology to measure AI models on alignment issues, including whether models tend to lie. The funding reflects investor confidence in third-party AI evaluation tools as model proliferation accelerates.

Telecom operators are adopting open-source AI models as a core strategic component, with 89% of respondents in NVIDIA's State of AI in Telecommunications report citing their importance. Open models enable telcos to customize AI for network operations, customer service, and edge deployment while maintaining control and reducing costs compared to proprietary alternatives. NVIDIA and partners are releasing telecom-specific models like Nemotron 3 Large Telco Model to accelerate this shift.

Mistral AI, a French AI lab, has released Mistral Large 4, a new large multimodal model designed to compete with both American and Chinese AI rivals. The release represents the company's effort to establish itself as a credible alternative in a market dominated by larger players. The model's capabilities and positioning suggest Mistral is targeting both open and closed AI model segments.

GLM 5.3, a 753-billion-parameter mixture-of-experts model from Zhipu AI, is now available on Amazon Bedrock with managed APIs and cross-region inference. The model is optimized for coding and long-horizon agentic tasks, with reported improvements in coding benchmarks and emergent cybersecurity capabilities. Enterprise customers can access it without managing infrastructure, with support for prompt caching and OpenAI-compatible APIs.