Step 5 Preview: API Provider Performance Benchmarking & Price Analysis

Step 5 Preview released September 2026, available through StepFun API. 1M context window, function calling support, proprietary license.

StepFun provider metrics: $0.71costpertask,100mediantokens/s,2.96smedianfirstchunk,28.02stotalresponse.Blendedprice$0.51 per 1M tokens (7:2:1 cache hit/input/output ratio).

Step 5 Preview scores 44 on the Artificial Analysis Intelligence Index v4.3 (median comparable models: 25). Pricing: $1.00/Minputtokens,$2.70/M output tokens. Full Intelligence Index evaluation cost $918.34.