Run: 2026-05-01-01KQHT27VX0R3H815KQJV2YXZ4

Run Details

Duration:
2.3s
Cost:
$0.000404
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
0.01% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The elegant ballroom sparkled under glittering chandeliers while guests mingled in their finest evening attire. Suddenly a sharp scream pierced through the sophisticated conversations causing immediate panic among the wealthy crowd. Detective Harlan Blackwood arrived swiftly at the scene examining the lifeless body with professional expertise. The victim lay motionless in a pool of dark crimson blood near an ornate antique fireplace. Everyone present appeared shocked and nervous about the brutal murder that had occurred during dinner. Harlan began questioning the attendees one by one searching for clues among their evasive answers.
created_at"2026-05-01T13:01:20.658Z" 5/1/2026, 1:01:20 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency360
moderation_latency(null)
generation_time2206
tokens_prompt46
tokens_completion165
native_tokens_prompt157
native_tokens_completion110
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached64
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"
usage0.00040405
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"174097be-f7f4-9db9-8f3c-1ff511b3f71e"
is_byokfalse
latency92
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-1777640480-fzlkzkOW10Ej8wlnrRhH"
session_id(null)
api_type"completions"
id"gen-1777640480-v39G6qziHHrjqyPVaktX"
upstream_id"174097be-f7f4-9db9-8f3c-1ff511b3f71e"
total_cost0.00040405
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
0.01% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
015
116
215
316
415
515