Run: 2026-02-20-01KHY9BTB36JQBE0W3QMKGY8NR

Run Details

Model:
Grok 4.1 Fast
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
10.0s
Cost:
$0.000561
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The grandfather clock struck midnight. Fog shrouded the ancient mansion. Lord Blackwood sipped poisoned brandy. A scream pierced silent darkness. Guests froze in dining room. Servants rushed to master's chamber. Body sprawled on bloodied rug. Detective Hale arrived through storm.
created_at"2026-02-20T19:45:25.367Z" 2/20/2026, 7:45:25 PM
model"x-ai/grok-4.1-fast"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency384
moderation_latency(null)
generation_time9911
tokens_prompt46
tokens_completion185
native_tokens_prompt191
native_tokens_completion1090
native_tokens_completion_images0
native_tokens_reasoning1030
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"
usage0.00056055
router(null)
provider_responses
0
endpoint_id"9821aa0e-dce3-4c27-9716-161359123d0b"
id"4b9a49fc-f4e7-5b78-1c51-33f201a79d09"
is_byokfalse
latency217
model_permaslug"x-ai/grok-4.1-fast"
provider_name"xAI"
status200
api_type"completions"
id"gen-1771616725-sQlD7HK3Z1POTt9zt5bk"
upstream_id"4b9a49fc-f4e7-5b78-1c51-33f201a79d09"
total_cost0.00056055
cache_discount0.00002265
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
05
15
25
35
45
55
65
75