Step 5 Preview
Step 5 Preview is StepFun's language model with a 1.0M context window and up to 64K output tokens, available from 2 providers, starting at $1.00 / 1M input and $2.70 / 1M output. A sparse Mixture-of-Experts flagship LLM with 600B total parameters built for agentic coding, professional knowledge work, and financial analysis.
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video✓
PDF·
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities5/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema✓
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | ||
|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
| $1.00 | $2.70 | $0.05 | |
| $1.00 | $2.70 | $0.05 | |
Cost Calculator
US Dollar ($)
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| Step 5 Preview | 1.0M | $1.00 | $2.70 | Current | |
| Step 5 Preview | — | — | — | — | Available |
| Step 3.7 Flash | 262K | $0.200 | $1.15 | Available | |
| Step 3 VL 10B | — | — | — | — | Available |
| Step Image Edit 2 | — | — | — | — | Available |
| Step 1X Edit 1.2 | — | — | — | — | Available |
| Step 1X Edit | — | — | — | — | Available |