Artificial Atlas

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Thinking Machines Lab

Post-training and fine-tuning as the product.

HQ
San Francisco
Founded
Feb 2025
Web
thinkingmachines.ai
Camps
LLM scaling

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What it does

Mira Murati's lab raised the largest seed round on record, $2B at $12B, in July 2025, and sells post-training tooling (Tinker) rather than a chatbot. A $50B round it sought in late 2025 fell through; as of September 2026 it is in talks at about $40B.

Camp membership over time

  1. dates not recorded
    Scale next-token prediction
    Post-training and fine-tuning as the product. $2B seed at $12B; seeking ~$40B in September 2026.
    Sources Mira Murati's Thinking Machines Lab is worth $12B in seed round TechCrunch 2025-07-15 · Thinking Machines Lab seeks $1 billion at $40 billion valuation PYMNTS 2026-09-03

Capital

AmountKindValuationDateInvestorsSource
$2Bseed $12B post-moneyJul 2025 Andreessen Horowitz, Nvidia, Accel, ServiceNow, Cisco, AMD, Jane Street TechCrunch

People

Mira MuratiMira MuratiFounder and CEO
JSJohn SchulmanChief scientist

General sources

Mira Murati's Thinking Machines Lab is worth $12B in seed round TechCrunch 2025-07-15 · Thinking Machines Lab seeks $1 billion at $40 billion valuation PYMNTS 2026-09-03