Support quality
Check whether the assistant addressed the request, explained next steps or made an unsupported promise.
RESPAN / BEHAVIOR EVALUATION
Span-01: measure conversation behavior.
Define the behaviors you care about and check whether they appear in an assistant’s response. Span-01 is Respan’s higher-accuracy tier for evaluation, guardrails and monitoring.
100 credits for new accounts. Web and API use the same credit balance.
Answer type
Noul
A probability for each behavior
Credit rate
300
per million input tokens · minimum 1/request
Minimum charge
1 credit
Per successful request, on web and API
Span-01
300 credits per million input tokens, rounded up, with a minimum of 1 per successful request.
Span-01 Lite
Upstream input and output are free. This service charges 1 credit per successful web or API request.
Agent guardrails
Define the behavior you want to detect, such as sharing sensitive information or promising an unauthorized action.
Conversation monitoring
Evaluate several independent behaviors on the same conversation and inspect each probability.
Behavior evaluation workbench
Add up to eight yes/no behaviors. Use plain text or the conversation editor. Each behavior returns its own probability; no labels or score levels are needed.
Span · behavior evaluation
100 welcome credits · one balance for web & API
300 credits / million input tokens, minimum 1 per successful request, on web and API. Output is not charged.
Maximum credit budget: 1 credits
We reserve this budget before the model runs, then charge actual usage and return the difference. Failed calls are refunded.
New account? Receive 100 credits once. Short requests typically use 1 credit; longer inputs can use more.
Draft saved in this browser · Up to 8 behaviors · 32 KiB per request · live calls use credits.
Which behaviors appear in this response?
Run the example or add your own behaviors. Each result will show the model’s estimated probability that the behavior is present.
Web runs and saved configurations are private to your account. API history stores usage only.
UsageAPI pricing
OpenRouter lists $0.02 per million input tokens and free output. This service uses 300 credits per million input tokens on web and API, rounded up per request, minimum 1 credit. 5,000 input tokens cost 2 credits; 10,000 cost 3.
max(1, ceil(input_tokens × 300 / 1,000,000))
Upstream rates checked September 26, 2026. Output tokens are not charged. Every call requires enough credits for its reservation; actual usage is settled on success and failed calls are refunded.
OpenRouter · Span-01One endpoint, model-specific validation
Use a site API key with /v1/systemone and select respan/span-01 or respan/span-01-lite. Questions must use type: noul. The Code tab generates JavaScript, Python or cURL from your current input. Answers are at data.result.answers.
This service accepts up to 8 behaviors and 32 KiB per request. Conversation input is an input message array plus an assistant output message; arbitrary objects and bare arrays are not accepted. Web runs share the one-attempt-per-3-seconds limit.