The Trillion-Dollar Race: AI's IPO Moment

Anthropic raised $65 billion in a Series H round at a $965 billion valuation , putting it firmly ahead of OpenAI's $850 billion valuation as both rivals head toward expected IPOs later this year . The round closed late last month, according to Sherwood News. Since February, when Anthropic was valued at $380 billion, the company has seen its annualized run-rate revenue surge from $10 billion at the end of 2025 to $47 billion by May — a rate of growth Fortune calls "unprecedented for a company of this size."

Anthropic also released Claude Opus 4.8 less than six weeks after its last version, with incremental improvements in agentic coding tasks, multidisciplinary reasoning, and financial analysis , according to Sherwood News. Evaluations show Opus 4.8 is approximately four times less likely than Opus 4.7 to allow flaws in generated code to pass without acknowledgment , Pulse2 reported.

The timing matters. Anthropic announced Monday it has confidentially submitted paperwork with U.S. regulators for an initial public offering, with the IPO depending on market conditions and other factors , IndexBox reported. Goldman Sachs is leading a 21-bank syndicate for SpaceX, with the roadshow reportedly beginning around June 4 , according to IndMoney. OpenAI is targeting going public as early as September and is working with Goldman Sachs and Morgan Stanley on a draft IPO prospectus , Reuters reported.

Can Three Trillion-Dollar Labs Coexist?

Q1 2026 shattered every venture funding record at $300 billion globally, with Q2 2026 defined by the transition from private record-setting to public market debuts , according to AI Funding Tracker. Cerebras IPO'd May 14 raising $5.55 billion at a $95 billion market cap, gaining 68% on day one, while SpaceX roadshow begins June 8 targeting a $1.75 trillion debut and Anthropic overtook OpenAI in private valuation with a $965 billion Series H .

The capital requirements are staggering. Anthropic closed a financing round at a $965 billion valuation and said on Monday that it's confidentially filed for an IPO , CNBC reported. Anthropic has zoomed ahead of the field largely thanks to Claude Code, its AI coding assistant, with OpenAI shifting much of its focus from the consumer market to enterprise where its Codex offering is going up against Claude Code .

In May, Cursor signed an agreement with SpaceX that gives Elon Musk's company the right to acquire the startup for $60 billion , CNBC noted. The coding tools market has become the battleground. Database software maker MongoDB has rolled out three generative AI tools, including Anthropic's Claude Code, to its engineers, with CEO CJ Desai saying MongoDB is buying AI products one year at a time rather than opting for longer deals .

The European angle adds another layer. Mistral AI is at roughly $400 million in ARR as of early 2026, up from about $20 million a year earlier, with management openly guiding toward roughly $1.1 to $1.2 billion in revenue for full-year 2026 , according to Productify. Mistral is targeting 1 billion euros in revenue in 2026, though that figure is dwarfed by the balance sheets at OpenAI and Anthropic , CNBC reported.

French startup Mistral AI is exploring designing its own chips and may eventually develop them, CEO Arthur Mensch told CNBC, underscoring how the company is looking to control more of its infrastructure as it competes with U.S. heavyweights OpenAI and Anthropic . Mistral has been developing its own cybersecurity-focused AI model and has held discussions about it with the European banking sector, according to people familiar with the matter , Bloomberg reported.

Who's Actually Shipping Models?

The AI industry is releasing new models at an unprecedented rate, with trackers monitoring 309+ model releases across major organizations , according to LLM Stats. New AI models arrive every 2 days on average, with the most recent release tracked being NVIDIA Nemotron 3 Ultra 550B A55B, released on June 4, 2026 , AI Flash Report noted.

After refining its models for the needs of consulting firm McKinsey, Microsoft was able to outperform OpenAI's GPT 5-5, with 10 times better cost efficiency, said Mustafa Suleyman, CEO of Microsoft AI , CNBC reported. At its Build developer conference in San Francisco on Tuesday, Microsoft announced MAI-Code-1-Flash, its inaugural model that takes written descriptions from people and spits out source code for applications and websites, with the AI coding market taking off of late .

xAI is moving fast on multiple fronts. Grok V9-Medium completed training at 1.5 trillion parameters — three times the size of the current v8-small production model at 500 billion parameters, with supervised fine-tuning and reinforcement learning underway as of late May and a public release expected in mid-June 2026 , according to Basenor. Available via the xAI API in public beta since May 29, Grok Build 0.1 is a dedicated coding model built for agentic tasks, carrying a 256,000-token context window, always-on reasoning, and priced at $1 per million input tokens and $2 per million output tokens .

The model race has become a release cadence war. Anthropic published a separate safety paper proposing a coordinated global pause mechanism for AI development, disclosing in that document that Claude wrote more than 80% of the code merged into its own production systems , Yellow.com reported. That figure has circulated widely as an illustration of how fast AI capabilities are compounding.

What Changed This Week

The heads of OpenAI, Anthropic, Google DeepMind, and Microsoft AI signed a joint open letter to US Congress on June 5, 2026, calling for mandatory screening requirements on synthetic DNA providers, warning that advances in AI are eroding the technical barriers previously needed to weaponize biological material , according to Yellow.com. The letter arrived the same week Anthropic's valuation leap became public. Four of the five largest venture rounds in history closed in Q1: OpenAI ($122B), Anthropic ($30B), xAI ($20B), Waymo ($16B) — collectively absorbing $188B or ~63% of global VC, with AI capturing 80%+ of total , AI Funding Tracker reported. The money is real. The question is whether the public market valuations will hold.

What to Watch

Elon Musk's SpaceX is expected to launch its IPO roadshow on June 4, with the rocket and satellite maker likely targeting about $75 billion in proceeds at a valuation of roughly $1.75 trillion — if the company raises $75 billion, it would surpass Saudi Aramco's 2019 listing as the world's largest IPO , IndexBox reported. Anthropic said it expects to bring its Mythos-class models to all customers "in the coming weeks" , Fortune noted. Nasdaq's Fast Entry rule effective May 1, 2026 allows companies with a market cap within the top 40 of existing Nasdaq-100 components to be added within 15 trading days of listing, with S&P Dow Jones Indices separately considering fast-tracking mega-cap IPOs into the S&P 500 within six months , according to AI IPO Tracker. If SpaceX, OpenAI, and Anthropic all qualify, index funds become forced buyers within weeks — creating structural demand that has no historical parallel.