StepFun: Step 5 Preview
StepfunNew
stepfun/step-5-previewAbout this model
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
Make a request
OpenAI-compatible: set the base URL and your Promptix API key, keep your existing SDK.
curl https://promptix.tn/api/v1/chat/completions \ -H "Authorization: Bearer $PROMPTIX_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "stepfun/step-5-preview", "messages": [ {"role": "user", "content": "Hello! What can you do?"} ] }'Pricing
In TND per 1M tokens. VAT and the platform fee are added at top-up.
Input tokens
3.960 TNDper 1M tokens
Output tokens
10.692 TNDper 1M tokens
1,000 requests with 1K input and 500 output tokens cost about 9.306 TND.
Specifications
- Provider
- Stepfun
- Context window
- 1,000,000 tokens
- Input modality
- Text
- Added
- Oct 8, 2026
- Supported parameters
frequency_penaltyinclude_reasoninglogprobsmax_tokensreasoningreasoning_effortresponse_formatstop