TypeSafe AI is a San Francisco frontier AI lab building machine-native, composable AI: models designed to work as primitives inside software rather than as conversational assistants for people. Its first model, Jev, is a System One model trained with Reinforcement Learning for Calibrated Decisions (RLCD) that returns typed decisions with calibrated confidence scores at under 100 milliseconds of latency, so software can automate economically valuable work and escalate only low-confidence cases. Founded by ex-OpenAI researcher Diogo Almeida, co-inventor of RLHF, together with Erik Gafni and Sasha Sheng, the company emerged from stealth in September 2026 with a $40M seed round led by DCVC.
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Oct 9, 2026
Latest raise
Funding activity · 2 rounds
Oct 9, 2026
$870M
Series C+
Led by Andreessen Horowitz
TypeSafe AI Raises $870M Series C+ Led by Andreessen Horowitz TypeSafe AI, a San Francisco frontier AI lab, has raised $870 million in a Series C+ round led by…
Read articleSep 15, 2026
$40M
Seed
Led by DCVC
TypeSafe AI Emerges from Stealth with $40M Seed Round Led by DCVC TypeSafe AI, a San Francisco based frontier AI lab, has emerged from stealth with a $40 milli…
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