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Step 5 Preview

Step 5 Preview is developed by StepFun, released 2026-09-16.

Model ID: step-5-preview

China-region price; check the official site; Single public source; verify on the official site
Input price
$1.0461 / 1M tok
Output price
$2.9889 / 1M tok
Blended price
$1.5318 / 1M tok
Epoch Capabilities Index (ECI)
No public data yet
Epoch Mock AIME accuracy
No public data yet
Epoch FrontierMath (T1–3) accuracy
No public data yet
Arena text rating
1448.3
70th percentile of 164 models with an Arena text rating score
LMArena · as of 2026-11-06
Arena coding rating (human preference votes, not task accuracy)
1506.1
LMArena · as of 2026-11-06
Arena math rating
1464.9
LMArena · as of 2026-11-06
Arena WebDev rating
1572.0
LMArena · as of 2026-11-06

Third-party resale listings

Captured 2026-11-06 from the reseller marketplace subrouter.ai's public pricing list. These are third-party resale prices, not StepFun's official price. Many resellers use shared/subscription access or reverse-engineered integrations — availability and quality are not verified by this site. Prices are USD per 1M tokens. Reseller names are the marketplace's own listing IDs, not company names — none of them is StepFun or any other model developer.

1 reseller passed our sanity checks against StepFun's official price; cheapest trusted price $1.1236/1M blended.

Reseller (marketplace ID)Input $/1MOutput $/1MBlended $/1Mvs. official
xcgx 0.7672 2.1928 1.1236 73%

Resale listings: subrouter.ai public marketplace snapshot 2026-11-06.

Official list price from StepFun, as recorded by models.dev. See the third-party resale listings above for reseller prices — those are not official and not verified by this site.

See all of StepFun's models on its provider page, or browse the full model directory. Full source licenses and sync dates: /data-sources/.