Run: 2026-05-01-01KQHRPWF5F5RKVNQCFMCGQ5P1

Run Details

Duration:
993ms
Cost:
$0.000234
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
81.57% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Darkness cloaked the silent mansion. Footsteps echoed down hallway. A body lay undiscovered. Blood pooled on carpet. Detective arrived late evening. Mystery awaited his investigation.
created_at"2026-05-01T12:37:39.946Z" 5/1/2026, 12:37:39 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency382
moderation_latency(null)
generation_time946
tokens_prompt46
tokens_completion51
native_tokens_prompt157
native_tokens_completion42
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"
usage0.00023405
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"255b1cdd-8826-5ade-d340-80626204f004"
is_byokfalse
latency85
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-1777639059-XEW7Eu8Ds1bWHhOuVLIS"
session_id(null)
api_type"completions"
id"gen-1777639059-psQoWzLTfRfjjSKVjty8"
upstream_id"255b1cdd-8826-5ade-d340-80626204f004"
total_cost0.00023405
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
81.57% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
05
14
24
34
44
54