Vercel AI GatewayStepFun 3.5 Flash model ID, context window & pricing
step
Quick facts
Model ID stepfun/step-3.5-flash
Source Vercel AI Gateway
Context Window 262114
Pricing $0.09 input / $0.30 output per 1M tokens
Capabilities tool calling, reasoning, temperature control
Model overview
StepFun 3.5 Flash is an AI model from Vercel AI Gateway with 262114 token context window and text input support.
Published pricing is $0.09 input and $0.30 output per 1M tokens.
- Workloads that use text inputs with text outputs.
- Agent and tool workflows that need function calling.
- Reasoning-heavy prompts where stepwise problem solving matters.
Model ID stepfun/step-3.5-flash
Provider Vercel AI Gateway
Family step
Status -
Knowledge Cutoff 2025-01
Release Date 2026-01-29
Input Modalities text
Output Modalities text
Context Window 262114
Input Limit -
Output Limit 262114
Tool Calling Yes
Reasoning Yes
Structured Output -
Temperature Control Yes
Open Weights No
Input Cost / 1M tokens $0.09
Output Cost / 1M tokens $0.30
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens -
Cache Write Cost / 1M tokens $0.02