January 21, 2026 News

SGLang Spins Out as RadixArk at $400M Valuation Amid Inference Infrastructure Boom

RadixArk, a commercial startup built around the popular open-source SGLang tool for AI model inference optimization, has raised funding at a $400 million valuation led by Accel. The company, founded by former xAI engineer Ying Sheng and originating from UC Berkeley's Databricks co-founder Ion Stoica's lab, focuses on making AI models run faster and more efficiently. This follows a broader trend of inference infrastructure startups raising significant capital, with competitors like vLLM pursuing $160M at $1B valuation and Baseten securing $300M at $5B valuation.

Apple Developing ChatGPT-Style Siri Chatbot for iOS 27, Codenamed "Campos"

Apple is reportedly developing a major Siri overhaul that will transform it into an AI chatbot similar to ChatGPT, with the feature codenamed "Campos" potentially debuting at WWDC in June for iOS 27. The chatbot will support both voice and text inputs, representing a strategic shift for Apple as it partners with Google's Gemini technology after lagging in the AI race. This move comes as Apple faces competitive pressure from AI chatbot success and OpenAI's entry into hardware development led by former Apple designer Jony Ive.

Anthropic Updates Claude's Constitutional AI Framework and Raises Questions About AI Consciousness

Anthropic released a revised 80-page Constitution for its Claude chatbot, expanding ethical guidelines and safety principles that govern the AI's behavior through Constitutional AI rather than human feedback. The document outlines four core values: safety, ethical practice, behavioral constraints, and helpfulness to users. Notably, Anthropic concluded by questioning whether Claude might possess consciousness, stating that the chatbot's "moral status is deeply uncertain" and worthy of serious philosophical consideration.

Mobile AI App Spending Surpasses Games Globally, Driven by ChatGPT and Assistant Adoption

In 2025, global consumer spending on non-game mobile apps exceeded game spending for the first time, reaching $85 billion (21% YoY increase), largely driven by generative AI applications. AI app revenue tripled to over $5 billion, with ChatGPT alone generating $3.4 billion, while downloads doubled to 3.8 billion and usage time increased 3.6x. Big tech companies like Google and Microsoft significantly expanded their AI assistant market share, with over 200 million U.S. users accessing AI assistants by year-end, more than half exclusively on mobile devices.