Anthropic has secured $3.5 billion in new funding in a Series F round led by Amazon, according to a Reuters report. The deal lifts the AI startup’s valuation to more than $40 billion, underscoring continued investor appetite for large-scale artificial intelligence companies.

The company has become one of the most closely watched players in the fast-moving AI market, where major technology firms and venture investors continue to pour in capital despite rising concerns about competition, regulation, and the cost of building frontier models.

Amazon’s lead role in the round deepens its relationship with Anthropic, which has drawn backing from other major technology investors as it expands its product and research efforts. The latest financing adds to a growing wave of high-value AI deals in 2026.

The funding comes as AI companies race to scale infrastructure, attract enterprise customers, and sharpen their models in a sector increasingly defined by enormous capital requirements and intense strategic competition.