step-3.7-flash · StepFun
step-3.7-flash is stepfun's flagship inference model, designed for high-complexity tasks that require deep reasoning and fast execution. It excels at decomposing multi-step problems, performing tool calls, and maintaining consistency across massive datasets. It is the preferred choice for complex workloads such as long-context agents, advanced software engineering, and end-to-end research automation.
step-3.7-flash is stepfun's flagship inference model, designed for high-complexity tasks that require deep reasoning and fast execution. It excels at decomposing multi-step problems, performing tool calls, and maintaining consistency across massive datasets. It is the preferred choice for complex workloads such as long-context agents, advanced software engineering, and end-to-end research automation.
Step 3.7 Flash has a 256,000 token context window.
On AIHubMix, Step 3.7 Flash costs $0.22 per million input tokens and $1.32 per million output tokens. Cached input reads are billed at $0.044 per million tokens.
Step 3.7 Flash accepts text, image and video input.
Step 3.7 Flash is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to step-3.7-flash — no other code changes needed.
Step 3.7 Flash is developed by StepFun. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
Step 3.7 Flash was released on May 29, 2026 by StepFun.
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Use Step 3.7 Flash via the AIHubMix unified API — one interface for every major LLM.