Step 5 Preview (step-5-preview) is a chat model from stepfun with a 1M-token context window; open-weight; capabilities tools, vision, reasoning; input image, text, video; output text.
1MContext
65.5KMax output
$1.04613$ / 1M in
Pricing
Input
$1.04613 / 1M tokens
Output
$2.98895 / 1M tokens
Currency
USD
Note
Indicative US list price — verify with the vendor.
Indicative US list price — a reference only, verify with the vendor. Source: models-dev. Last verified 2026-10-30.