Step 3.5 Flash
StepFun · model · context window 256,000 tokens.
Pricing (per 1M tokens)
Specifications
Intelligence & value
MeasuredWorth it? Step 3.5 Flash is on the price/quality frontier — nothing we track matches its overall Arena score for less. If you can accept a small quality drop, the downgrade calculator finds cheaper options.
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 28 July 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
Estimate cost with Step 3.5 Flash
Step 3.5 Flash is pre-selected below. Enter your token counts and volume to see the cost per request, per day and per month — then switch models to compare.
Results update automatically as you type.
- Input cost
- $0.000100
- Output cost
- $0.000150
- Per request
- $0.000250
- Per day
- $0.2500
- Per month
- $7.50
Source: auto-discovery (models.dev). Prices are re-checked daily against the provider’s official pricing; this rate was last changed on 19 July 2026. A recent date here just means the price is still current, not that it moved.