#Model release

AITypeSafe AI, parent of the decision-only model Jev, raised $870 million in a Series A at a $7.5 billion post-money valuation, according to the company. The model handles judgment tasks rather than chat or code, and reportedly processes over one trillion tokens a day, mostly from automated backend calls. The company also says about a third of Fortune 500 companies use or have access to it.

Why it matters: The piece traces how a decision-only model went from stealth to a $7.5 billion valuation in 24 days, showing how backend automation drives adoption.

AITypeSafe AI raised $870 million at a $7.5 billion valuation, led by Andreessen Horowitz with participation from Sequoia and DCVC. The company says Jev, released September 15, is used by a third of Fortune 500 companies, and it is a transformer model that outputs probabilities rather than text. TypeSafe claims Jev runs faster and uses far fewer tokens than LLMs, positioning it for automation tasks.

AIa16z says it is leading an investment in TypeSafe AI, whose Jev model hands decisions to code as typed values and reached 1 trillion tokens generated three days after launch. The company says Jev costs roughly 1/100 to 1/500 of frontier models and runs 100x faster on classification tasks at comparable accuracy. TypeSafe says 25% of the Fortune 500 have integrated Jev.

AIA 10-person stealth lab founded by Peking University PhD student Tian Keyu raised $30 million from Wolves VC and IDG at a $200 million valuation, according to Leiphone. Tian, who was sued by ByteDance for 8 million yuan over a 2024 sabotage incident, plans a base model trained on about 100 million hours of video using a 200,000-symbol visual vocabulary, targeting a 2027 release.

AIGoogle says Gemini 4 Argon is rolling out at $2/$10 per million tokens, though the author has not yet been able to access the model to test it. OpenAI pulled GPT-6.1 Astra over alignment failures and released GPT-6.1 Sol, which it prices at the same $2/$10 and says shows substantial alignment improvements over GPT-6 Sol. The post also covers Anthropic's leaked IPO prospectus, which reportedly lists roughly $518 billion in compute commitments, and a court ruling upholding the Department of War's supply chain risk designation of Anthropic.

AISpaceX has exercised its option to acquire Cursor in an all-stock transaction, aiming to build highly useful AI models. The quoted announcement says SpaceXAI has spent several months jointly training a model with Cursor, to be released soon in Cursor and Grok Build.

AIJason Wei says his team began nine months ago by running a basic script to inference Llama, and now has a complete stack and its first model out. The release is Muse Spark, the first model from Meta Superintelligence Labs, which powers Meta AI according to Alexandr Wang.

AIAman Sanger says Cursor's team evaluated many base models on perplexity-based evals and found Kimi k2.5 the strongest. Composer 2 was then built with continued pretraining and a 4x scale-up of high-compute RL, with Fireworks providing inference and RL samplers. The author admits Cursor should have named the Kimi base in its launch blog and says it will do so for the next model.

AIAman Sanger of Cursor says Composer 2 is a really good model and he is excited for more people to try it. The quoted reply from Lee Robinson says Composer 2 started from an open-source base, with only about one-quarter of the final model's compute coming from that base. Cursor plans full pretraining in the future and says it is following the license through its inference partner terms.