0

Step 3.5 Flash

Step 3.5 Flash is an AI model from Stepfun.

Publisher
Stepfun
Family
Step
Input
Output
Released
2 Feb 2026

Cite

Notes

Only stored in your browser.

Attribution

Benchmark scores
AAOpenReward
Attribution policy →
Input
$0.10
/1M tok
Output
$0.30
/1M tok
Blended
$0.15
#223/ 461/1M · 3:1
Speed
0
#115/ 461tok/s

Price & speed via Artificial Analysis · ranked across tracked models

Reported on 8 evals across 5 domains - best 94.4% on τ²-bench (Tau²-bench) · #18 of 321

Reported eval scores

8