Run: 2026-05-01-01KQHRSX30GBJP13RCST465VTP

Run Details

Model:
Grok 4.20 (Reasoning)
Test:
Data extraction
Scenario:
Who's the tallest?
Duration:
9.4s
Cost:
$0.001909
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
Fail Matches text (details)
Pass Matches Regex (details)
no eval Overall

Model input

User/Human
Who is the tallest person based on the following text? Only return the name, nothing else. Jack is shorter than Jill. Jill is taller than Tom but shorter than Sarah. Mike is the same height as Jack.

Model response

AI
Sarah The text provides these inequalities: Jack < Jill, Tom < Jill < Sarah, and Mike = Jack. This means Sarah is strictly taller than Jill (and thus taller than Jack, Mike, and Tom). No other person is described as taller than Sarah.
created_at"2026-05-01T12:39:18.888Z" 5/1/2026, 12:39:18 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8620
moderation_latency(null)
generation_time9315
tokens_prompt52
tokens_completion219
native_tokens_prompt167
native_tokens_completion734
native_tokens_completion_images(null)
native_tokens_reasoning681
native_tokens_cached128
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.00190935
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"cd1de98a-ed24-9aac-9cc7-3988c893233d"
is_byokfalse
latency115
model_permaslug"x-ai/grok-4.20-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777639158-K2E0TVhhSZup5uFCvCfC"
session_id(null)
api_type"completions"
id"gen-1777639158-swu8GlyGJhgkFggIA18d"
upstream_id"cd1de98a-ed24-9aac-9cc7-3988c893233d"
total_cost0.00190935
cache_discount0.0001344
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
Fail Matches text
Case sensitive: Sarah
 n/a
Pass Matches Regex
/\bSarah\b/
 n/a
no eval