StepFun
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Listed October 2026
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Open Weights
Step 5 Preview
Arena #83 • score 1447 ±9
Open Weights model from StepFun, listed October 2026. Arena text score 1447 (#83 of 414 entries). $1.00 input / $2.70 output per 1M tokens. 1M tokens context.
Parameters
Not listed in our sources
Context Window
1M tokens
Input / 1M tokens
$1.00
Output / 1M tokens
$2.70
Benchmark Results
- Arena Text Elo: 1447 (#83 of 414 on arena.ai · ±9 · 4,799 votes · variant: Step 5 Preview)
- AA Intelligence Index: 43.7 (Artificial Analysis v4.3 · best setting: Step 5 Preview · checked 2026-10-11)