← All models
StepFun · Language model
Step 3.5 Flash
stepfun/step-3.5-flash- Language
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Specifications
- Context window
- 262,144 tokens
- Max output
- 65,536 tokens
- Input
- text
- Output
- text
- Reasoning
- always on
- Tokenizer
- Other
Supported parameters
Accepted by the model and forwarded as-is by the gateway.
- frequency_penalty
- max_tokens
- reasoning
- temperature
- tool_choice
- tools
- top_k
- top_p
Use it
POST /api/v1/chat/completions · MCP chat · full reference
curl https://omnirail.org/api/v1/chat/completions \
-H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
-d '{"model":"stepfun/step-3.5-flash","messages":[{"role":"user","content":"Hello"}],"max_tokens":300}'