Key Points:
- Anthropic and OpenAI both filed confidential U.S. IPO documents within one week of each other.
- The back-to-back filings set up a race for the first trillion-dollar public listing of generative AI.
- Anthropic’s annualized revenue grew to over $44 billion in May, outpacing OpenAI’s $25 billion.
- The fierce rivalry extends from raw computing power and talent acquisition to high-stakes defense contracts.
The intense corporate rivalry between Anthropic and OpenAI, the creators of the dominant Claude and ChatGPT models, has accelerated the generative AI boom. This relentless competition has now culminated in a back-to-back, high-stakes race to go public on Wall Street. The two companies are rushing to beat each other to the public markets, viewing their initial public offerings (IPOs) as a vital way to shape how investors value the broader artificial intelligence sector. By establishing themselves as the primary public proxy for AI, both firms seek to secure massive pools of capital to fund their escalating operations.
The rivalry dates back to 2020, when Dario Amodei, then the vice president of research at OpenAI, left the company alongside several senior researchers over disagreements about safety and commercialization. When OpenAI executives heard rumors in late 2022 that Amodei’s new startup, Anthropic, was developing an advanced conversational AI, Chief Executive Officer Sam Altman immediately ordered his engineers to fast-track ChatGPT. OpenAI released ChatGPT just two weeks later, sparking a global technological revolution that has permanently altered the digital landscape. Today, that same urgency dictates the timelines of their respective public debuts.
Anthropic took the first decisive step by submitting confidential IPO documents to U.S. regulators on June 1. OpenAI quickly followed, filing its own confidential IPO paperwork on June 8, exactly one week later. This parallel sprint will establish the first pure-play generative AI stock on public markets, allowing Wall Street to directly grade their business models. Both firms are targeting historic valuations. Recent private funding rounds have valued Anthropic at approximately $965 billion, while OpenAI seeks a valuation of around $852 billion, placing both companies on the verge of the coveted trillion-dollar club.
The public filings highlight a staggering growth trajectory for both firms, though Anthropic has shown sharper financial momentum in recent months. Anthropic’s annualized revenue experienced explosive growth, surging from $9 billion at the end of 2025 to over $44 billion by May. In contrast, OpenAI’s annualized revenue sits at approximately $25 billion. While OpenAI boasts a larger active user base, Anthropic’s rapid revenue growth and safety-oriented corporate positioning have attracted significant interest from enterprise clients wary of data privacy issues.
The commercial warfare has also sparked an intense battle for top-tier technical talent. Recently, prominent AI researcher and founding member of OpenAI, Andrej Karpathy, officially joined Anthropic. Karpathy, who previously served as Tesla’s director of AI, represents a major intellectual acquisition for the Claude developer. This high-profile hiring further heightens tensions between Altman and Amodei, as both firms scramble to monopolize the limited global supply of elite machine learning engineers capable of training next-generation models.
The intense corporate rivalry extends directly into the federal government and defense sectors, where the two giants have taken radically different paths. While OpenAI successfully secured a cooperative partnership with the U.S. Department of Defense to run its models on classified networks, Anthropic found itself placed on the Pentagon’s “supply chain risk” list, prohibiting federal agencies from using its products. Anthropic is currently fighting this government designation in federal court, arguing that the defense agency abused its authority.
Interestingly, both companies have renewed their warnings about the potential existential dangers of frontier AI, even as they pitch their massive growth stories to public investors. Anthropic recently proposed a global coordination framework to temporarily pause development if safety thresholds are breached, provided that competitors do not use the pause to gain a competitive advantage. OpenAI similarly floated the idea of an international, multilateral body to slow development if necessary. Skeptics suggest these warnings act as a strategic maneuver to demonstrate corporate responsibility as they seek trillion-dollar valuations.
These back-to-back public filings mark the official transition of the AI industry from an experimental, venture-backed playground to a mature, public-facing market sector. Regardless of which CEO rings the Nasdaq listing bell first, their relentless competition has permanently altered the global economy. As the two giants prepare to face the scrutiny of retail shareholders, the success of their business models will dictate the pace, safety, and ultimate direction of the physical and digital AI revolution.
