Step 3.5 Flash 2603
Step 3.5 Flash 2603 is developed by StepFun, released 2026-04-02.
Third-party resale listings
Captured 2026-10-20 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 $0.09/1M blended.
| Reseller (marketplace ID) | Input $/1M | Output $/1M | Blended $/1M | vs. official | |
|---|---|---|---|---|---|
| xcgx | 0.06 | 0.18 | 0.09 | 60% |
Resale listings: subrouter.ai public marketplace snapshot 2026-10-20.
See all of StepFun's models on its provider page, or browse the full model directory.