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Mirendil Discusses New Funding at $5 Billion Valuation as Investors Bet on Self-Improving AI

September 22, 2026 at 15:30 EDT

Funding & M&A
Foundation Models
AI Agents

Mirendil, the self-improving AI startup founded by former Anthropic researchers, is discussing a new financing that would value it at $5 billion including the investment, less than three months after its $200 million seed round. The talks could bring as much as $1 billion in new capital, with Kleiner Perkins in talks to lead and Andreessen Horowitz also discussing an investment.

Sep. 22, 2026 · Mirendil

A fivefold valuation test

The former Anthropic researchers' startup is discussing up to $1 billion in new capital at a $5 billion valuation, three months after a $200 million seed round.

$5B

valuation under discussion, including the investment

$1B

maximum new capital being discussed

$200M

seed round announced in June

founding researchers and engineers

Valuation step-up

$1B

seed value

$5B

talks value

Each block equals $1 billion. The discussed valuation is five times the June seed-round value.

The research loop Mirendil wants to automate

Propose experiments

→

Write and run code

→

Interpret results

→

Choose next tests

Why investors care

The platform could let more teams do frontier AI R&D without building a full model lab first.

What remains unproven

The round is not closed, and Mirendil has not publicly disclosed revenue, product specs or benchmark evidence.

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