Compare two eval runs
curl --request GET \
--url https://gateway.errorbar.ai/v1/evals/compare \
--header 'Authorization: Bearer <token>'import requests
url = "https://gateway.errorbar.ai/v1/evals/compare"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://gateway.errorbar.ai/v1/evals/compare', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://gateway.errorbar.ai/v1/evals/compare",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://gateway.errorbar.ai/v1/evals/compare"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://gateway.errorbar.ai/v1/evals/compare")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://gateway.errorbar.ai/v1/evals/compare")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{}{
"error": {
"message": "<string>",
"type": "<string>",
"code": "<string>"
}
}{
"error": {
"message": "Invalid API key",
"type": "invalid_request_error",
"code": "invalid_api_key"
}
}Evals API
Compare two eval runs
Compare two finished eval runs arm-by-arm (before vs after a prompt, tool or index change) and get each arm's delta with a 95% interval and a significance flag, instead of eyeballing two reports.
400 when a or b is missing. 404 when either run is not in this workspace. 412 {code:"precondition_failed"} when both runs are not DONE, when they are different eval kinds, or when they used different judge models (a delta between judges measures the judges, not your change — re-run one with the other's judge). Best used with identical sample_filters on both runs. Read-only, no spend.
GET
/
v1
/
evals
/
compare
Compare two eval runs
curl --request GET \
--url https://gateway.errorbar.ai/v1/evals/compare \
--header 'Authorization: Bearer <token>'import requests
url = "https://gateway.errorbar.ai/v1/evals/compare"
headers = {"Authorization": "Bearer <token>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
fetch('https://gateway.errorbar.ai/v1/evals/compare', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://gateway.errorbar.ai/v1/evals/compare",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://gateway.errorbar.ai/v1/evals/compare"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://gateway.errorbar.ai/v1/evals/compare")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://gateway.errorbar.ai/v1/evals/compare")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{}{
"error": {
"message": "<string>",
"type": "<string>",
"code": "<string>"
}
}{
"error": {
"message": "Invalid API key",
"type": "invalid_request_error",
"code": "invalid_api_key"
}
}Authorizations
Your workspace API key, e.g. sk_sovereign_..., sent as Authorization: Bearer <key>.
Query Parameters
Eval run id of the BEFORE run (baseline of the comparison).
Eval run id of the AFTER run. Delta is reported as b − a.
Response
{a:{id, name, created_at, judge_model, eval_kind}, b:{…same}, rows:[{arm (candidate key), metric ("win_rate" for comparison runs; "observed_pass_rate" and, when both runs carry one, "corrected_pass_rate" for criterion runs), a:{rate, n, ci:[lo,hi]}, b:{rate, n, ci}, delta (b.rate − a.rate), delta_ci:[lo,hi] (Newcombe 95%), significant (interval excludes zero)}], unmatched:{a:[arm keys only in a], b:[arm keys only in b]}}. Cache-Control: no-store.
The response is of type object.