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Testing Prompts in the Playground

The Playground lets you see how any prompt will be routed before it hits production. Use it to verify tier classification, check cost estimates, and debug unexpected routing decisions.

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How to Test a Prompt

  1. Open Playground from the dashboard sidebar
  2. Type or paste your prompt into the input box
  3. Click Route or press Ctrl+Enter
📷 [Screenshot: Playground with a prompt in the input box and the Route button visible]

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Reading the Result

After routing, you see a result panel with:
📷 [Screenshot: Routing result panel showing tier badge, model name, confidence bar, cost comparison, and fallback chain]

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Tier Badge

Shows which tier was assigned, for example STANDARD. Color-coded:
ColorTier
GrayNANO
GreenSIMPLE
TealLIGHT
BlueSTANDARD
PurpleCOMPLEX

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Selected Model

The model Routor would use for this request. Shown as provider/model-name, for example deepseek/deepseek-v4-pro or google/gemini-3.5-flash.

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Confidence Score

How certain the classifier is about the tier assignment, from 0 to 1.
RangeMeaning
0.75 to 1.0High confidence, clear classification
0.55 to 0.74Medium confidence, reasonable match
Below 0.55Borderline, sat near a tier boundary

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Cost Estimate

Shows the estimated cost for this request on the selected model vs what it would have cost on a baseline model like Claude Opus 4.8. Example: 
Selected:  $0.0008   (Kimi K2.6)
Baseline:  $0.0250   (Opus 4.8)
Savings:   96.8%

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Fallback Chain

The ordered list of models Routor would try if the primary fails: 
1. zai/glm-5.2                  primary
2. moonshot/kimi-k2.6           first fallback
3. google/gemini-3.5-flash      second fallback

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Testing Against a Profile

To see how a prompt routes under a specific profile:
  1. Select the profile from the Profile dropdown above the input box
  2. Type your prompt and click Route
The result will reflect the profile’s tier floor, ceiling, and capability caps.
📷 [Screenshot: Profile dropdown above the prompt input with a profile selected]

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Example Prompts to Try

These cover the full tier range and help you understand how the classifier works:
PromptExpected TierWhy
”hi”NANOSingle greeting word
”what’s 2+2”SIMPLETrivial fact
”explain what a closure is”LIGHTGeneral explanation
”refactor this auth middleware”STANDARDDetailed code task
”design a microservice architecture”COMPLEXArchitecture level
”prove the square root of 2 is irrational”COMPLEXFormal mathematical proof, routed to a reasoning-specialist model within COMPLEX
Run each one and compare the confidence scores to build intuition for how the classifier works.

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What the Playground Does Not Do

  • It does not make a real API call to the model. It only runs the routing decision.
  • It does not charge credits for testing prompts.
  • It does not show the actual model response, only the routing decision.
To see a real response, use the actual API with your app or a tool like Postman.