Run: 2026-02-20-01KHYB9W2WVTWTVWD8CMZYTD22

Run Details

Duration:
7.4s
Cost:
$0.000604
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
22.67% 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
In the dim library light, Sir Reginald's body lay sprawled lifelessly on the antique Persian rug near the fireplace. Blood pooled slowly from the deep gash across his throat, staining the wool fibers a dark crimson red. The annual family gala had ended just hours before, with guests retiring to their rooms in the old mansion. Now whispers echoed through the shadowed halls as footsteps hurried toward the discovery in growing alarm. Inspector Harlan Graves arrived swiftly, his rain-soaked coat dripping water onto the polished oak floorboards. Who among the heirs could have wielded the knife under cover of the stormy midnight darkness outside?
created_at"2026-02-20T20:19:18.759Z" 2/20/2026, 8:19:18 PM
model"x-ai/grok-4-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4623
moderation_latency(null)
generation_time7208
tokens_prompt46
tokens_completion169
native_tokens_prompt191
native_tokens_completion1176
native_tokens_completion_images0
native_tokens_reasoning1049
native_tokens_cached151
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.00060355
router(null)
provider_responses
0
endpoint_id"c9586d9d-97ff-40ca-ae94-22504d6f9b7e"
id"83ef7041-9d5e-04a3-6c32-ac0a260759d2"
is_byokfalse
latency194
model_permaslug"x-ai/grok-4-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771618758-BpYMJKrDZ5CIiawaYxrO"
upstream_id"83ef7041-9d5e-04a3-6c32-ac0a260759d2"
total_cost0.00060355
cache_discount0.00002265
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
22.67% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
118
219
316
416
517