Anthropic surpasses OpenAI to become most valuable AI startup
Anthropic's $65 billion Series H funding round values it near $1 trillion, surpassing OpenAI's $852 billion valuation.
Anthropic raised $65 billion in Series H funding from investors including Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, pushing its valuation to nearly $1 trillion and above OpenAI's recent $852 billion valuation. The company's annual revenue grew to $47 billion from $10 billion the previous year, driven by adoption of Claude AI and Claude Code among software developers. Anthropic introduced Claude Opus 4.8 and Claude Mythos Preview, a closed system with enhanced cybersecurity capabilities. Both Anthropic and OpenAI are preparing for public listings, with OpenAI potentially filing for an IPO within weeks.
What HN community is saying
Developers debate Claude versus GPT-5.5 Codex performance. Top-ranked comments indicate GPT-5.5 excels on large codebase refactoring due to its apply_patch primitive, which provides two-phase validation and anchor error feedback, while Claude Code makes more mistakes but produces more elegant and idiomatic solutions. Users report both models hallucinate and generate verbose code. One commenter challenged colleagues to identify code source blind and found results indistinguishable, suggesting marketing influences perception more than inherent quality differences. Another disputed this, claiming the models are night and day apart.