Step 3.5 Flash 2603
As of Oct 4, 2026, the cheapest Step 3.5 Flash 2603 API price is $0.1 per 1M input tokens (EmpirioLabs AI) and $0.3 per 1M output tokens (EmpirioLabs AI). Step 3.5 Flash 2603 is offered by 6 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.
| EmpirioLabs AIopen | Cheapest$0.1 | Cheapest$0.3 | $0.02 | — | 256k |
| NanoGPTopen | $0.1 | $0.3 | $0.05 | — | 262k |
| StepFun (China)open | $0.1 | $0.3 | $0.02 | — | 256k |
| StepFun (Global)open | $0.1 | $0.3 | $0.02 | — | 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 2603 pricing FAQ
What is the cheapest Step 3.5 Flash 2603 API?
As of Oct 4, 2026, EmpirioLabs AI has the lowest Step 3.5 Flash 2603 output price at $0.3 per 1M tokens, and EmpirioLabs AI has the lowest input price at $0.1 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 2603?
6 providers list Step 3.5 Flash 2603 on Sovyron; 4 of them sell it at a metered per-token price.
Is Step 3.5 Flash 2603 free?
No provider in the Sovyron catalog lists a free tier for Step 3.5 Flash 2603.
What is the context window of Step 3.5 Flash 2603?
Step 3.5 Flash 2603 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
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