Anthropic, the creator of the Claude AI suite, has eclipsed OpenAI with a $900 billion valuation after a $65 billion fundraising round. The surge follows rapid adoption of its Claude Code programming tool and the security‑focused Mythos model, which attracted enterprise and government clients. The growth sparked scrutiny over compute costs. Investors now view the firm as the front‑runner in the AI arms race.

Revenue estimates illustrate the gap: Anthropic’s run‑rate climbed from $4 billion in July to $47 billion this month, while OpenAI reported roughly $24 billion in March and just over $30 billion later. Market share on OpenRouter and business adoption metrics from billing platform Ramp also show Claude outpacing competing models for the past 18 months, reinforcing its commercial momentum. Analysts warn that OpenAI disputes Anthropic’s revenue methodology, adding uncertainty.

Despite the upside, Anthropic faces headwinds: billions spent on cloud capacity—including rentals from SpaceX—have strained margins, and a Pentagon lawsuit labels the firm a national‑security supply‑chain risk. Token‑intensive models could also feel pressure if corporate AI budgets tighten. Both Anthropic and OpenAI are courting significantly trillion‑dollar IPOs, intensifying competition for limited public‑market capital.