Run: 2026-05-01-01KQHS1X11Q3BMJB8XJBE3W4V7

Run Details

Duration:
31.8s
Cost:
$0.008017
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
100.00% 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 sudden bright lightning flashes revealed the silent old mansion. A very wealthy banker lay dead at his wooden desk. The sharp letter opener protruded deeply from his bloody back. The servants gathered nervously in the hallway outside the study. The whispers spread quickly about who might have killed him.
created_at"2026-05-01T12:43:40.966Z" 5/1/2026, 12:43:40 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency31379
moderation_latency(null)
generation_time31721
tokens_prompt46
tokens_completion813
native_tokens_prompt159
native_tokens_completion3181
native_tokens_completion_images(null)
native_tokens_reasoning3125
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"
usage0.00801685
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"c2be1e7b-8588-f7fa-6755-4cb094a1c704"
is_byokfalse
latency294
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-1777639420-I7QEIWwI9PGYU2odY3rS"
session_id(null)
api_type"completions"
id"gen-1777639420-d3NCxQr0LfZZ7NZUvevp"
upstream_id"c2be1e7b-8588-f7fa-6755-4cb094a1c704"
total_cost0.00801685
cache_discount0.0001344
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
010
110
210
310
410