All AI models · StepFun

StepFun model list

All 3 notable StepFun models tracked in 2026, out of 279 across every lab. Sorted newest first, with context length and capabilities. Data from the open models.dev database.

3
Models
3
Reasoning
1
Vision
3
Open weights
Model Context Capabilities
Step 3.7 Flash
stepfun/step-3.7-flash
Newer StepFun flash model for faster agents, coding, and multimodal prompts
 256K Reasoning Tools Vision Open
Step 3.5 Flash 2603
stepfun/step-3.5-flash-2603
StepFun flash model for efficient multimodal reasoning, coding, and tool use
 256K Reasoning Tools Open
Step 3.5 Flash
stepfun/step-3.5-flash
StepFun flash lane for quick multimodal reasoning and coding assistance
 256K Reasoning Tools Open

Which of these can I call for free?

This page lists what exists, not what is free. For the models you can call right now with one free key and no credit card, see the live API catalog or read the free LLM API guide. Open-weight models can also be run on your own GPU, and the VRAM calculator tells you whether yours is big enough.

Model lists by lab

OpenAI (56) Google (43) Alibaba (Qwen) (33) Anthropic (23) NVIDIA (20) Mistral (18) Zhipu AI (14) Cohere (14) MiniMax (7) Moonshot AI (7) xAI (6) Xiaomi (6) DeepSeek (5) Meta (4) Poolside (4) DeepReinforce (4) Perplexity (3) StepFun (3) Sakana AI (2) Tencent (2) Sarvam AI (2) Microsoft (1) Thinking Machines (1) Meituan (1)

Model metadata sourced from the open models.dev database. See the full 279-model index for a filterable view across every lab.