For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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OverviewElevenCreativeElevenAgentsElevenAPIReception AIAPI referenceChangelog
OverviewElevenCreativeElevenAgentsElevenAPIReception AIAPI referenceChangelog
  • API reference
    • Introduction
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  • ElevenAgents
      • GETList LLMs
      • POSTCalculate expected LLM usage
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ElevenAgentsLLM

Calculate expected LLM usage

POST
/v1/convai/llm-usage/calculate
POST
/v1/convai/llm-usage/calculate
$curl -X POST https://api.elevenlabs.io/v1/convai/llm-usage/calculate \
>     -H "Content-Type: application/json" \
>     -d '{
>  "prompt_length": 1500,
>  "number_of_pages": 10,
>  "rag_enabled": true
>}'
1{
2  "llm_prices": [
3    {
4      "llm": "gpt-4o",
5      "price_per_minute": 2.75
6    },
7    {
8      "llm": "gemini-2.5-flash",
9      "price_per_minute": 1.1
10    },
11    {
12      "llm": "claude-3-5-sonnet",
13      "price_per_minute": 1.85
14    }
15  ]
16}
Returns a list of LLM models and the expected cost for using them based on the provided values.
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Headers

xi-api-keystringOptional

Request

This endpoint expects an object.
prompt_lengthintegerRequired
Length of the prompt in characters.
number_of_pagesintegerRequired
Pages of content in PDF documents or URLs in the agent's knowledge base.
rag_enabledbooleanRequired
Whether RAG is enabled.

Response

Successful Response
llm_priceslist of objects

Errors

422
Unprocessable Entity Error