The Signal · 2026-W39
Alibaba and StepFun Open Frontier Models as Sora API Ends
Alibaba open sources a transparent image model, StepFun launches a 600 billion parameter agent model, and OpenAI closes the Sora API as Tesla widens FSD's collision safety net.
Moves
Drops
OpenAI retires the Sora video API on September 24
Developers using sora-2 and sora-2-pro lose API access this week, leaving migration choices entirely up to each team.
Alibaba open sources Qwen-Image-2.1 with native transparent generation
Designers get a 7 billion parameter model that generates transparent images and edits up to 10 references at once, free for research.
StepFun launches Step 5 Preview with a million token context
Agent builders get a 600 billion parameter model at a dollar per million input tokens, with open weights arriving October 15.
Tesla rolls out FSD v14.3.10 with automatic collision evasion
Cybertruck owners gain Vehicle-to-Home Powerwall backup as Tesla widens its automatic collision evasion safety net across HW4 cars.
Events
AI adopters add senior staff and shed juniors across 41 countries
Stanford and King's College researchers find senior headcount up 6.7% and junior down 3% over five years at AI-adopting firms.