Swiftest.AI
JEV inference is in private beta

One fast API for model decisions.

Run structured classifiers on open models. Send one context and many questions. Get scored answers without generating prose. Use JEV as an if statement that understands language.

Try the model routerRead the API example

Available models

A focused catalog for low-latency structured decisions.

SemIf ยท Qwen3.5-4B
private beta
Model IDswiftest-jev-small
Context4096 tokens
InputFree in beta
OutputScored logits

JEV model router

An if statement that understands language. JEV answers four typed questions about each chat message in one call. A plain rule then picks where the message goes: a local model, a cloud model, an image model, or a web search.

Every message uses the same JEV config below. Personal data always stays on the local model.
Free demo. No sign-in needed. Rate limits apply.
The JEV config: 4 typed questions
    The routing rule
    
        
    
        
    
          
          
    Choose an example or type a message, then route it.
    
        
    
      
    
      
    
        
    This session
    What the router saved across the messages you routed on this page.
    
          Assumed cloud price $ per 1M tokens
    
        
    
          
    Stayed local0%0 of 0 messages
    
          
    Cloud tokens avoided0estimated
    
          
    Cloud cost$0.00vs $0.00 if all went to the cloud
    
          
    Routing time-median JEV call
    
        
    
        
    
        
    
        
    Estimate: prompt tokens are characters divided by 4, plus 500 reply tokens per message. "Stayed local" counts the local model and follow-up questions. Image and search requests go to tools, not to the cloud model. The price is an assumption that you can change.
    
        
    
      
    
      
    Hello world: one yes/no question
      
    
        
    
        
    {
  "status": "ready"
}
    
      
    
      
    
    
    
    
    
      
    API first
    Create a key in your account, then call the classifier endpoint.
    
      
    curl https://swiftest.ai/v1/classifier \
  -H "Authorization: Bearer $SWIFTEST_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "swiftest-jev-small",
    "state": "User message: Prove that there are infinitely many primes.",
    "questions": {
      "route": {"type": "choice", "instructions": "Pick the best destination.",
                "criteria": {"local_model": "Simple tasks", "cloud_reasoning": "Hard coding or proofs"}},
      "complexity": {"type": "score", "instructions": "How hard is it?",
                     "criteria": ["Trivial", "Easy", "Moderate", "Hard", "Expert"]},
      "contains_pii": {"type": "noul", "instructions": "Does it contain personal data?"}
    }
  }'
    
      
    
    
    
    Swiftest Labs
    Many Minds, benchmark tools, public sessions, and community features remain available.
    Open Labs