StepFun
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Listed January 2026
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Open Weights
Step-3.5-Flash
Arena #169 • score 1393 ±4
Open Weights model from StepFun, listed January 2026. Arena text score 1393 (#169 of 414 entries). $0.10 input / $0.30 output per 1M tokens. 256K tokens context.
Parameters
Not listed in our sources
Context Window
256K tokens
Input / 1M tokens
$0.10
Output / 1M tokens
$0.30
Benchmark Results
- Arena Text Elo: 1393 (#169 of 414 on arena.ai · ±4 · 60,381 votes · variant: step-3.5-flash)
- AA Intelligence Index: 17 (Artificial Analysis v4.3 · best setting: Step 3.5 Flash 2603 · checked 2026-10-11)