Anthropic Weighs $50B Round at $900B Valuation — Tops OpenAI

Anthropic is weighing a fresh funding round of approximately $50 billion at a valuation above $900 billion, according to a Bloomberg report published April 29, 2026. If the deal closes near the high end of the reported $850–900 billion range, Anthropic would more than double its February valuation and leapfrog OpenAI — whose recent $122 billion raise valued it at $852 billion post-money — to become the most valuable AI startup in the world.

What Happened

Bloomberg first broke the story on April 29, citing people familiar with the matter who said Anthropic has received multiple preemptive term sheets totaling around $50 billion at valuations between $850 billion and $900 billion. TechCrunch and CNBC followed within hours, both confirming the price range and adding that Anthropic gave investors a 48-hour window to submit allocations — an unusually compressed timeline that signals competitive demand. A board meeting in May is expected to decide whether to proceed and on what terms.

The new round, if accepted, would come less than three months after Anthropic's February raise at a $380 billion valuation. That February round was itself record-setting; the size of the gap to a potential $900 billion mark in just over 90 days is what most observers found striking. Reuters and Yahoo Finance both note that the round has not been finalized and that no offers have been formally accepted.

Anthropic, the maker of Claude, is weighing offers totaling roughly $50 billion at a valuation between $850 and $900 billion — potentially the largest private AI raise on record.

Key Details

Headline numbers: $50 billion in new capital at an $850–900 billion valuation, per Bloomberg, TechCrunch and CNBC sources.
Comparison to OpenAI: OpenAI's recently completed funding round closed at an $852 billion post-money valuation; the upper end of Anthropic's range exceeds that figure by roughly $50 billion.
Pace of growth: Anthropic was valued at $61.5 billion in March 2025 and $380 billion in February 2026. A $900 billion mark would represent more than a 14× jump in 14 months.
Investor timeline: Anthropic asked potential backers to submit capital allocations within a 48-hour window, with a finalized deal targeted within roughly two weeks of the May board meeting.
Revenue context: Enterprise customers now represent approximately 80% of Anthropic's revenue, with more than 1,000 businesses spending over $1 million annually on the company's services, according to numbers cited by Bloomberg and CNBC.
Existing backers: Google in April 2026 committed up to $40 billion to Anthropic at a $350 billion valuation; Amazon previously led a $4 billion investment. Both are likely to participate again to maintain ownership.

What Investors and Developers Are Saying

On Hacker News, the top thread on the round drew over 800 comments within 24 hours, with skeptics pointing out that an $850–900 billion valuation implies aggressive forward revenue assumptions even by 2026 AI standards, while proponents cite Anthropic's 80% enterprise revenue share and rapid Claude API adoption inside Fortune 500 customers as justification. On X, AI researchers including ex-OpenAI staffers framed the move as the natural reaction to OpenAI's $122 billion raise — the two companies are now in a genuine valuation arms race rather than a polite duopoly.

Reuters noted that the considerations are still "at a very early stage" and that no offers have been formally accepted; The Information added that the speed of the process has surprised even seasoned growth investors, several of whom are reportedly pushing Anthropic to slow the timeline. Bloomberg's sources caution that the final terms could shift materially before any deal closes.

What This Means for Developers and Enterprises

For developers building on the Claude API, a $900 billion-valued Anthropic translates into multi-year capital runway for model R&D, more compute for Claude Opus and Claude Sonnet successor families, and continued investment in Claude Code, the Claude Agent SDK and the Cowork desktop app. The financial cushion makes it less likely that Anthropic will need to push abrupt API price increases or deprecations in the near term — a real concern for teams that built production workflows on smaller AI labs over the last two years.

For enterprises evaluating long-term AI vendor lock-in, a near-trillion-dollar valuation also signals that Anthropic is positioning for an eventual public listing rather than an acquisition. Several reports describe this round as potentially the company's last major private raise before an IPO — meaning enterprise contracts signed in 2026–2027 will likely be honored by a public Anthropic, with the disclosure obligations and pricing stability that implies.

What's Next

The May Anthropic board meeting is the next checkpoint. If the board approves the round, sources cited by Bloomberg and TechCrunch expect a deal to be finalized within roughly two weeks of that meeting. Existing investors — led by Google and Amazon — are widely expected to participate to defend their ownership stakes. Watch for an official announcement on Anthropic's blog or PR newsroom; the company has historically confirmed funding milestones via short posts on its News page within 24 hours of close.

Sources

Bloomberg — Original April 29, 2026 report breaking the story.
TechCrunch — Independent confirmation and details on the 48-hour investor window.
CNBC — Comparison with OpenAI's $852B post-money valuation and enterprise revenue mix.
Reuters via Investing.com — Cautions that the round is at an early stage.
Yahoo Finance — Cross-reference and historical valuation timeline.
AIToolly — Detailed coverage of the 48-hour allocation deadline.