Step 3.5 Flash
As of Oct 4, 2026, the cheapest Step 3.5 Flash API price is $0.09 per 1M input tokens (Eden AI) and $0.3 per 1M output tokens (Eden AI). Step 3.5 Flash is offered by 11 providers, open weights, reasoning enabled.
API pricing by provider
Metered per-token prices. Cheapest input and output are highlighted; † marks a context-tier surcharge. How prices are ranked.
| Eden AIopen | Cheapest$0.09 | Cheapest$0.3 | $0.02 | — | 262k |
| EmpirioLabs AIopen | $0.1 | $0.3 | $0.02 | — | 256k |
| Hugging Faceopen | $0.1 | $0.3 | — | — | 262k |
| Kilo Gatewayopen | $0.1 | $0.3 | — | — | 262k |
| NanoGPTopen | $0.1 | $0.3 | $0.05 | — | 262k |
| OpenRouteropen | $0.1 | $0.3 | — | — | 262k |
| StepFun (China)open | $0.1 | $0.3 | $0.02 | — | 256k |
| StepFun (Global)open | $0.1 | $0.3 | $0.02 | — | 256k |
| ZenMux | $0.1 | $0.3 | — | — | 256k |
Subscription plans (not per-token)
Billed per month, not per token — never counted as the cheapest offer.
| StepFun Step Plan (China)plan | — | — | 256k |
| StepFun Step Plan (Global)plan | — | — | 256k |
Step 3.5 Flash pricing FAQ
What is the cheapest Step 3.5 Flash API?
As of Oct 4, 2026, Eden AI has the lowest Step 3.5 Flash output price at $0.3 per 1M tokens, and Eden AI has the lowest input price at $0.09 per 1M tokens. Prices are metered per-token rates in USD; free tiers and subscription plans are excluded.
How many providers offer Step 3.5 Flash?
11 providers list Step 3.5 Flash on Sovyron; 9 of them sell it at a metered per-token price.
Is Step 3.5 Flash free?
No provider in the Sovyron catalog lists a free tier for Step 3.5 Flash.
What is the context window of Step 3.5 Flash?
Step 3.5 Flash supports a 262k-token context window and up to 256k output tokens.
Token cost calculator
What a month costs at one provider's published rates. Enter the tokens you expect to send and receive; cached tokens use the cached-input price where the provider lists one, and count as ordinary input where it does not.
Estimated
—