Run: 2026-02-20-01KHY999T2XPM1T94RPTPSXKZZ

Run Details

Duration:
23.8s
Cost:
$0.000955
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
90.58% 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 brilliant flash of lightning lit up the dark sky. Thunder crashed loudly, shaking windows of the old stone house. Sir Reginald Blackwood sat alone in his dimly lit study. He poured a tall glass of scotch whiskey quite slowly. The heavy oak door creaked open very late tonight. A shadowy figure slipped inside the room without any sound. Sir Reginald looked up suddenly from his leather armchair seat. The intruder drew a sharp dagger gleaming in firelight. One swift thrust pierced his chest ending life instantly. Blood pooled darkly on the Persian rug beneath his chair. Dawn light revealed the horror to the screaming housemaid.
created_at"2026-02-20T19:44:02.896Z" 2/20/2026, 7:44:02 PM
model"x-ai/grok-4.1-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency300
moderation_latency(null)
generation_time23686
tokens_prompt46
tokens_completion500
native_tokens_prompt191
native_tokens_completion1890
native_tokens_completion_images0
native_tokens_reasoning1767
native_tokens_cached190
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"
usage0.0009547
router(null)
provider_responses
0
endpoint_id"9821aa0e-dce3-4c27-9716-161359123d0b"
id"761e94be-f228-bf54-9124-319361f09e77"
is_byokfalse
latency139
model_permaslug"x-ai/grok-4.1-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771616642-ZvJNYdY39aSag2uaJU8n"
upstream_id"761e94be-f228-bf54-9124-319361f09e77"
total_cost0.0009547
cache_discount0.0000285
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
90.58% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
010
110
210
310
49
510
610
79
89
910
109