Run: 2026-05-01-01KQHRS0VHFRRCT4DHG7WYA47D

Run Details

Duration:
2.1s
Cost:
$0.000317
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
77.46% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The detective entered the dimly lit mansion at midnight. Rain pounded hard against the tall windows with fury. A single scream echoed through the empty hallways upstairs. Blood stained the antique carpet near the victim's body. Everyone present seemed nervous and avoided direct eye contact. The butler clutched his silver tray with visible tension. Thunder roared loudly as lightning illuminated the grim scene briefly. Police sirens approached from afar growing increasingly nearer. Secrets hid behind every closed door in this wealthy home. The clock struck twelve marking the start of investigations now.
created_at"2026-05-01T12:38:49.974Z" 5/1/2026, 12:38:49 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency407
moderation_latency(null)
generation_time2085
tokens_prompt46
tokens_completion152
native_tokens_prompt157
native_tokens_completion102
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.00031685
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"c6fad15a-db2a-907d-86ff-f6a31572ca65"
is_byokfalse
latency90
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-1777639129-oONjXfdhpAlBoY3tjLRh"
session_id(null)
api_type"completions"
id"gen-1777639129-LpDImj0qyr4KXM4hkJBH"
upstream_id"c6fad15a-db2a-907d-86ff-f6a31572ca65"
total_cost0.00031685
cache_discount0.0001344
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
77.46% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
09
19
29
39
49
59
610
78
810
910