Mirendil closes $200M seed at $1B to build autonomous AI R&D systems, democratizing frontier research
Mirendil, a San Francisco-based AI lab, closed a $200 million seed round at a $1 billion valuation, one of the largest seed financings in AI history. The round was co-led by Andreessen Horowitz (a16z) and Kleiner Perkins, with NVIDIA and other investors participating. Founded by former Anthropic researcher Behnam Neyshabur, former Google/Anthropic researcher Harsh Mehta, and teammates Shayan Salehian and Tara Rezaei (also from Anthropic and xAI), the company launched in early 2026 weeks after its founders left Anthropic. The founding team counts 20 researchers across alumni from Anthropic, OpenAI, Google DeepMind, and xAI.
Mirendil is building what a16z calls a 'systems problem' in frontier AI: autonomous R&D systems that can generate hypotheses, design experiments, iterate on model training, and improve AI systems with minimal human intervention. The company trains specialized models on the full AI research loop—experimental design, hyperparameter search, model evaluation, debugging—then packages those capabilities as a platform for external organizations. The vision is to democratize frontier AI research, making it accessible to universities, pharmaceutical firms, roboticists, and materials scientists without the infrastructure of big labs.
Mirendil shipped no product and reported no revenue before closing the round, underscoring a structural shift in frontier AI funding: capital is flowing to teams and research direction rather than near-term commercialization. a16z frames the bet as enabling 'anyone to do AI work'—a university biology lab, for example, could build a drug-discovery model without a dedicated ML engineering team. The company plans to release its first model and product in coming months. The $200 million positions the startup at the scale of Series B–C companies, reflecting investor conviction that autonomous AI-driven research acceleration is the next frontier bet, provided the approach delivers results.
Sources
- Primary source
- techfundingnews.com
“Mirendil, a San Francisco-based AI startup founded by two former Anthropic researchers, has raised $200 million in seed funding at a $1 billion valuation”
- unite.ai
“Mirendil describes itself as a frontier AI laboratory developing systems that excel at AI research and development”
- mexc.com
“No products, technical details, or revenue figures have been disclosed to date... a $200 million is, in a meaningful sense, a wager on a research direction rather than on an existing capability”