TypeSafe AI, maker of the Jev model, raises an a16z led Series A three weeks after launch
launched a model accidentally served trillions of tokens a day 29.4% of the fortune 500 showed up raised a really big series A from @a16z it's been 3 weeks we would like to sleep now
Context
A model that outputs decisions instead of text drew one of the year's largest early rounds within weeks of release, a sign investors see room beyond chat models for automating software.
Diogo Almeida is a former OpenAI researcher who cofounded TypeSafe AI in 2024 with Sasha Sheng and Erik Gafni, according to TechCrunch. TypeSafe released Jev, its first model, on September 15. TechCrunch reports that Jev is built on a transformer but is not a large language model, and outputs probabilities, which the company calls calibrated decisions, instead of text.
Deep dive
In his post, Almeida says TypeSafe launched a model, accidentally served trillions of tokens a day, saw 29.4% of the Fortune 500 show up, and raised a really big Series A from a16z, all in three weeks. Those usage figures are his claims and have not been independently verified.
TechCrunch reported that TypeSafe raised $870 million at a $7.5 billion valuation, led by Andreessen Horowitz with participation from Sequoia and existing investor DCVC. TechCrunch also said the company claims a third of Fortune 500 companies already use the model, a slightly different figure from the 29.4% in Almeida's post. In its investment post, a16z called Jev the fastest growing model it has ever seen and said it reached 1 trillion tokens generated in three days after launch.
According to TechCrunch, TypeSafe says Jev works much faster and uses far fewer tokens than large language models, and positions it for automating tasks rather than writing text or code. On an a16z podcast with Ben Horowitz and Martin Casado, Almeida described Jev as a primitive that developers embed inside software to turn natural language intent into decisions programs can use, arguing that coding agents mostly produce the same kind of software faster.
TypeSafe previously raised a $40 million seed round led by DCVC, according to its website.
What to expect next
Watch for independent data on Jev's adoption, since the token and Fortune 500 figures come from the company and its investors.
Also watch competition. Microsoft announced its own model for fast structured decisions on the same day, and other labs may follow. How TypeSafe spends the new round, and whether Jev's reliability holds up in production, will show whether decision models become a real category.