Calculate expected LLM usage

POST https://api.elevenlabs.io/v1/convai/agent//llm-usage/calculate Content-Type: application/json

Calculates expected number of LLM tokens needed for the specified agent.

Reference: https://elevenlabs.io/docs/api-reference/agents/calculate

• https://api.elevenlabs.io (Production, default)
• https://api.us.elevenlabs.io (Production US)
• https://api.eu.residency.elevenlabs.io (Production EU)
• https://api.in.residency.elevenlabs.io (Production India)
• https://api.sg.residency.elevenlabs.io (Production Singapore)

• agent_id (string, required)

This endpoint expects a LLMUsageCalculatorRequestModel.

• prompt_length (integer, optional, nullable) — Length of the prompt in characters.
• number_of_pages (integer, optional, nullable) — Pages of content in pdf documents OR urls in agent's Knowledge Base.
• rag_enabled (boolean, optional, nullable) — Whether RAG is enabled.

Successful Response

• llm_prices (list of LLMUsageCalculatorLLMResponseModel, required)

Validation Error

• detail (list of ValidationError, optional)

• llm (enum, required)
  • Allowed values: gpt-4o-mini, gpt-4o, gpt-4, gpt-4-turbo, gpt-4.1, gpt-4.1-mini, gpt-4.1-nano, gpt-5, gpt-5.1, gpt-5.2, gpt-5.2-chat-latest, gpt-5.4, gpt-5.4-mini, gpt-5.4-nano, gpt-5.5, gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna, gpt-6-astra, gpt-6-sol, gpt-6-luna, gpt-5-mini, gpt-5-nano, gpt-3.5-turbo, gemini-1.5-pro, gemini-1.5-flash, gemini-2.0-flash, gemini-2.0-flash-lite, gemini-2.5-flash-lite, gemini-2.5-flash, gemini-3-pro-preview, gemini-3-flash-preview, gemini-3.1-pro-preview, gemini-3.1-flash-lite-preview, gemini-3.1-flash-lite, gemini-3.5-flash, gemini-3.5-flash-lite, gemini-3.6-flash, gemini-3.7-flash, gemini-3.8-flash, claude-sonnet-4-5, claude-opus-4-7, claude-opus-4-8, claude-opus-5, claude-opus-5-5, claude-sonnet-4-6, claude-sonnet-5, claude-sonnet-4, claude-haiku-4-5, claude-3-7-sonnet, claude-3-5-sonnet, claude-3-5-sonnet-v1, claude-3-haiku, grok-beta, custom-llm, qwen3-4b, qwen3-30b-a3b, qwen36-35b-a3b, qwen35-397b-a17b, gpt-oss-20b, gpt-oss-120b, glm-45-air-fp8, glm-52, deepseek-v41-flash, gemini-2.5-flash-preview-09-2025, gemini-2.5-flash-lite-preview-09-2025, gemini-2.5-flash-preview-05-20, gemini-2.5-flash-preview-04-17, gemini-2.5-flash-lite-preview-06-17, gemini-2.0-flash-lite-001, gemini-2.0-flash-001, gemini-1.5-flash-002, gemini-1.5-flash-001, gemini-1.5-pro-002, gemini-1.5-pro-001, claude-sonnet-4@20250514, claude-sonnet-4-5@20250929, claude-haiku-4-5@20251001, claude-3-7-sonnet@20250219, claude-3-5-sonnet@20240620, claude-3-5-sonnet-v2@20241022, claude-3-haiku@20240307, gpt-5-2025-08-07, gpt-5.1-2025-11-13, gpt-5.2-2025-12-11, gpt-5.4-2026-03-05, gpt-5.4-mini-2026-03-17, gpt-5.4-nano-2026-03-17, gpt-5.5-2026-04-23, gpt-5-mini-2025-08-07, gpt-5-nano-2025-08-07, gpt-4.1-2025-04-14, gpt-4.1-mini-2025-04-14, gpt-4.1-nano-2025-04-14, gpt-4o-mini-2024-07-18, gpt-4o-2024-11-20, gpt-4o-2024-08-06, gpt-4o-2024-05-13, gpt-4-0613, gpt-4-0314, gpt-4-turbo-2024-04-09, gpt-3.5-turbo-0125, gpt-3.5-turbo-1106, watt-tool-8b, watt-tool-70b
• price_per_minute (double, required)
• price_per_message (double, required)

• loc (list of ValidationErrorLocItems, required)
• msg (string, required)
• type (string, required)

Request

{}

Response

{
  "llm_prices": [
    {
      "llm": "gpt-4o-mini",
      "price_per_minute": 1.1,
      "price_per_message": 1.1
    }
  ]
}

SDK Code

import { ElevenLabsClient } from "@elevenlabs/elevenlabs-js";

async function main() {
    const client = new ElevenLabsClient();
    await client.conversationalAi.agents.llmUsage.calculate("agent_id", {});
}
main();

from elevenlabs import ElevenLabs

client = ElevenLabs()

client.conversational_ai.agents.llm_usage.calculate(
    agent_id="agent_id",
)

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.elevenlabs.io/v1/convai/agent/agent_id/llm-usage/calculate"

	payload := strings.NewReader("{}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://api.elevenlabs.io/v1/convai/agent/agent_id/llm-usage/calculate")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{}"

response = http.request(request)
puts response.read_body

import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.elevenlabs.io/v1/convai/agent/agent_id/llm-usage/calculate")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();

<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.elevenlabs.io/v1/convai/agent/agent_id/llm-usage/calculate', [
  'body' => '{}',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();

using RestSharp;

var client = new RestClient("https://api.elevenlabs.io/v1/convai/agent/agent_id/llm-usage/calculate");
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);

import Foundation

let headers = ["Content-Type": "application/json"]
let parameters = [] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.elevenlabs.io/v1/convai/agent/agent_id/llm-usage/calculate")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()