Run: 2026-05-01-01KQHRTQ13E105VQ2KSTEFFJGX

Run Details

Duration:
2.3s
Cost:
$0.000439
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
42.36% 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 detective arrived at the old mansion under a stormy sky filled with ominous thunderclouds and pouring rain. A single light flickered inside the otherwise darkened house where the wealthy victim had been found dead earlier. Blood stained the antique carpet near the grand fireplace where a valuable diamond necklace lay mysteriously missing now. The butler stood silently by the doorway with an expression that revealed nothing about his possible involvement in this crime. Police officers searched every corner of the elaborate study for clues that might explain the brutal events of last night. Thunder crashed loudly overhead as lightning illuminated the horrified faces of all the gathered suspects in the room.
created_at"2026-05-01T12:39:45.447Z" 5/1/2026, 12:39:45 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency485
moderation_latency(null)
generation_time2211
tokens_prompt46
tokens_completion185
native_tokens_prompt157
native_tokens_completion124
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"
usage0.00043905
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"d6c26e3e-79ed-3a49-b118-715dbe58255f"
is_byokfalse
latency105
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-1777639185-RF0IyPfhqTJYLTF8vBiJ"
session_id(null)
api_type"completions"
id"gen-1777639185-uEdzfjwUyL4KtlhgM3eJ"
upstream_id"d6c26e3e-79ed-3a49-b118-715dbe58255f"
total_cost0.00043905
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
42.36% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
018
118
218
320
420
518