The AI Read
← Timeline
Sep 20 2026

StepFun opens API access to Step 5 Preview, weights promised October 15th

MODELOPEN
Original reporting
AStepFun

A 600B sparse with about 27B active, 1M-token context and image input at $1.00/$2.70 per million . The BF16 is a promise, not a release.

Named in this event

StepFun

Issues that mention StepFun
Around the same time
Sep 20 2026CHIPSINFRA
CXMT says its fifth-generation memory platform has entered mass production
BReuters
Sep 19 2026POLICYSAFETY
Trump proposes an AI Force and a new AI czar
BAxios
Sep 19 2026MONEYOPEN
Naive AI reaches a $1.42B valuation seven months from founding, pre-release
BThe Information
Sep 18 2026ADOPTPOLICY
Singapore confirms Waymo’s planned path to commercial rides in 2028
Alta