Home › Compare › StepFun: Step 3.5 Flash vs StepFun: Step 5 Preview
StepFun: Step 3.5 Flash vs StepFun: Step 5 Preview: API Pricing Compared
Comparing StepFun: Step 3.5 Flash and StepFun: Step 5 Preview: on combined input+output list price, StepFun: Step 3.5 Flash is cheaper at $0.4 vs $3.7 per 1M tokens — a difference of $3.3 (89%). StepFun: Step 3.5 Flash costs $0.1 in / $0.3 out with a 262,144-token context; StepFun: Step 5 Preview costs $1 in / $2.7 out with a 1,048,576-token context.
| StepFun: Step 3.5 Flash | StepFun: Step 5 Preview | |
|---|---|---|
| Input /1M | $0.1 | $1 |
| Output /1M | $0.3 | $2.7 |
| Cached input /1M | — | $0.1 |
| Context window | 262,144 | 1,048,576 |
| Max output tokens | 65,536 | 64,000 |
| Cost @ 10M in + 2M out / mo | $1.6 | $15.4 |
Estimate your own workload in the cost calculator, or open the full pages for StepFun: Step 3.5 Flash and StepFun: Step 5 Preview.
Frequently asked questions
Which is cheaper, StepFun: Step 3.5 Flash or StepFun: Step 5 Preview?
StepFun: Step 3.5 Flash is cheaper on combined list price: $0.4 vs $3.7 per 1M tokens (input + output). At 10M input + 2M output tokens per month, StepFun: Step 3.5 Flash costs $1.6 and StepFun: Step 5 Preview costs $15.4.
Which has the larger context window, StepFun: Step 3.5 Flash or StepFun: Step 5 Preview?
StepFun: Step 3.5 Flash has a context window of 262,144 tokens; StepFun: Step 5 Preview has 1,048,576 tokens. The larger one is StepFun: Step 5 Preview.
Price snapshot October 21, 2026, refreshed daily.