Summary: On April 29, 2026, Reuters relayed Bloomberg’s report that Anthropic was exploring a fundraise above a $900 billion valuation. That figure would top OpenAI’s March 31 record $122 billion round at an $852 billion post-money valuation. The report remained exploratory, with no assured outcome, final size, or closed agreement.
Bloomberg was first with the story, and on April 29, 2026, Reuters passed its report along: Anthropic is exploring another fundraise, this one at a valuation north of $900 billion — a number that would put it ahead of OpenAI. CNBC added its own write-up shortly after. Almost as striking as the figure is the calendar: Anthropic wrapped a $30B Series G at a $380B post-money valuation in February, so barely two and a half months separate the two rounds.
Twice the Valuation in About Eleven Weeks
A climb from $380B to somewhere above $900B leaves the total valuation more than double where it started, and the trip took roughly eleven weeks. Capital markets do not read valuation as a pure sentiment gauge: what the number encodes, all at once, is a re-rating of the revenue trajectory plus the money needed to honor future compute commitments. For a price still tagged “under discussion” to reach this height, prospective investors must already share a baseline view on both counts.
None of this has left the exploratory stage. The trail starts with Bloomberg’s report, and the road from “weighing” to agreed terms to a formal close still has room for surprises.
Trading Places With OpenAI
Part of what makes the story land is when it broke. On March 31, OpenAI finished a record $122B raise at an $852B post-money valuation. Should Anthropic lock in terms above $900B, the order between the two companies inverts for the first time, and the “most valuable” crown finds a new owner. As for which lab actually leads on frontier models, the capital market is visibly revising its verdict — and doing so moments after OpenAI rewrote the record books.
The Case for Raising Again So Soon
For a frontier lab, compute sets the budget: training the next generation of models, scaling out inference capacity, securing multi-year power and land deals — every line item is a commitment counted in the tens of billions. Measured against that yardstick, the $30B from February only goes so far. Assuming the reports hold up, returning to the market this quickly reads as a decision to stockpile ammunition in a single round rather than raise in installments and absorb the cost of valuation talks over and over.
Signals Worth Tracking
- Whether this round comes together at all, and what final size and valuation it settles on
- Whether OpenAI responds by shifting its potential IPO timeline
- How officials frame the use of proceeds: compute, the enterprise product, or both at once
At the exploratory stage no outcome is assured. Even so, the market’s willingness to discuss a price above $900 billion for Anthropic says most of what the first half of 2026 is about: money keeps pooling around frontier model companies, and Anthropic is now valued in the same tier as OpenAI.