Step 3.5 Flash by StepFun demonstrates competitive pricing. View detailed benchmark data including scores across coding, math, reasoning, speed, and cost metrics.
Specifications last checked against the provider on . Benchmark scores carry their own source, linked beside each number.
Cost Benchmarks
Context Benchmarks
Available from 12 providers
The same model costs different amounts depending on who serves it. You can bring your own key for 2 of these — connect it here.
| Provider | Input / 1M | Output / 1M | Cached in | Context | Your key |
|---|---|---|---|---|---|
| Nvidia | $0 | $0 | — | 256K | — |
| Eden AI | $0.09 | $0.3 | $0.02 | 262K | — |
| EmpirioLabs AI | $0.1 | $0.3 | $0.02 | 256K | — |
| Hugging Face | $0.1 | $0.3 | — | 262K | Supported |
| Kilo Gateway | $0.1 | $0.3 | — | 262K | — |
| NanoGPT | $0.1 | $0.3 | $0.05 | 262K | — |
| OpenRouter | $0.1 | $0.3 | — | 262K | Supported |
| StepFun (China) | $0.1 | $0.3 | $0.02 | 256K | — |
| StepFun (Global) | $0.1 | $0.3 | $0.02 | 256K | — |
| ZenMux | $0.1 | $0.3 | — | 256K | — |
| StepFun Step Plan (China) | — | — | — | 256K | — |
| StepFun Step Plan (Global) | — | — | — | 256K | — |
Step 3.5 Flash — Frequently Asked Questions
How much does Step 3.5 Flash cost?
Step 3.5 Flash costs $0.10 per 1M input tokens and $0.30 per 1M output tokens. This makes it one of the more affordable models.
What is the context window of Step 3.5 Flash?
Step 3.5 Flash has a context window of 262K tokens. This determines how much text, conversation history, and code the model can process in a single request.
Who created Step 3.5 Flash?
Step 3.5 Flash was created by StepFun. It is classified as a open source model in our catalogue.
Is Step 3.5 Flash open source?
Yes, Step 3.5 Flash is an open-source model. The model weights are publicly available for download and self-hosting.