AI News Roundup: Cheap Decision Models, Open Weights, a Bankruptcy
The week the conversation moved from smart to useful. The decision-model boom is real. Perplexity's pplx-decider-v1-27b and TypeSafe's Jev both
Look, I do not have time to learn another app. The week the conversation moved from smart to useful.
The decision-model boom is real. Perplexity's pplx-decider-v1-27b and TypeSafe's Jev both return typed, structured decisions instead of prose, priced around four hundredths of a cent per million tokens, and Jev hit number one on Hugging Face.
Open-weights week: Mistral Large 4 (a 1-trillion-parameter model) opened in preview on October 6 with weights promised by month's end, and Reflection AI teased its 501B Beam model.
Character.AI filed for Chapter 11 and agreed to sell its assets to Disney for 20 million dollars, a signal that consumer chat hype does not pay the bills.
DeepSeek V4.1 Flash narrowed the China-US frontier gap to about 3 percent, per Bloomberg reporting.
What I would tell a friend: The pattern across all of it is that the labs are racing on price and usefulness now, not just benchmark scores.
Not magic, but it paid for itself by lunch.
Updated October 28, 2026: prices and corporate events below were verified against original reporting.
Frequently asked questions:
Q: What are decision models?
A: Models like Perplexity's pplx-decider-v1-27b and TypeSafe's Jev that return typed, structured decisions instead of prose, priced around four hundredths of a cent per million tokens.
Q: Which open-weight models opened this week?
A: Mistral Large 4 (1 trillion parameters) opened in preview on October 6 with weights promised by month's end, and Reflection AI teased its 501B Beam model.
Q: What happened to Character.AI?
A: It filed for Chapter 11 and agreed to sell its assets to Disney for $20 million - a signal that consumer chat hype alone doesn't pay the bills.