Model catalog
One endpoint, every model. Compare context windows, capabilities and real per-token pricing side by side, then swap the model string in your request — nothing else changes.
- 351
- Models
- 35
- Providers
- 11
- Free to try
- $0.0001
- Cheapest input / 1M
2 of 351 models
- Language
Step 3.7 Flash
stepfun/step-3.7-flash
StepFun’s flagship multimodal reasoning model. Powered by a 198B-parameter / 11B-activation sparse MoE architecture, with native support for image and video understanding.
- Context
- 256K
- In / 1M
- $0.200
- Out / 1M
- $1.15
- Reasoning
- Tool use
- Vision
- +1
- Language
StepFun 3.5 Flash
stepfun/step-3.5-flash
Step 3.5 Flash is an open-source reasoning model by StepFun with 196B total parameters (11B active) using Mixture of Experts. It features a 256K context window, deep reasoning, tool calling, and agentic capabilities, achieving 97.3 on AIME 2025 and 74.4% on SWE-bench Verified.
- Context
- 262K
- In / 1M
- $0.090
- Out / 1M
- $0.300
- Reasoning
- Tool use
- Vision
- +1