Run: 2026-05-01-01KQHRVCFVQFF6HJ0N4TSKHQSM

Run Details

Duration:
2.4s
Cost:
$0.000354
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
87.04% 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 precisely. Blood stained the antique carpet near the grand piano silently. Sir Reginald lay motionless with a dagger in his back. The guests whispered nervously while avoiding eye contact guiltily. Thunder echoed loudly throughout every shadowy corridor and room. A single wine glass remained untouched on the side table. The clock struck twelve as rain battered the tall windows relentlessly. Nobody confessed anything while the tension grew increasingly unbearable. Inspector Harlow observed each suspect with careful calculated suspicion. The mystery had only just begun amid suspicious circumstances unfolding.
created_at"2026-05-01T12:40:07.424Z" 5/1/2026, 12:40:07 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency372
moderation_latency(null)
generation_time2344
tokens_prompt46
tokens_completion179
native_tokens_prompt157
native_tokens_completion117
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"
usage0.00035435
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"afc89cb1-c01e-900f-ac9c-d1440dd6baa2"
is_byokfalse
latency116
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-1777639207-JcghS9DLTf8nzAipASgK"
session_id(null)
api_type"completions"
id"gen-1777639207-zcjnOngd5dCQON6uiaJx"
upstream_id"afc89cb1-c01e-900f-ac9c-d1440dd6baa2"
total_cost0.00035435
cache_discount0.0001344
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
87.04% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
39
49
510
611
79
89
910