Run: 2026-02-20-01KHXPPWT5KV3MPGZC44KPJP1K

Run Details

Duration:
6.3s
Cost:
$0.000536
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
66.97% 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
The grand estate loomed under storm clouds, its windows flickering with candlelight as guests arrived for dinner that evening. Detective Harlow adjusted his cufflinks, watching the butler’s stiff posture betray something far more sinister than polite service. Lady Whitmore’s emerald necklace glinted too brightly, her laughter sharp enough to slice through the thick tension in the air. A sudden clatter from the library sent the footman scrambling, his pale face suggesting he knew exactly what had happened. The scent of lavender and gunpowder clung to the hallway, mingling with the metallic tang of blood seeping beneath the study door. Whispers erupted as the lights flickered again, each shadow stretching like accusing fingers toward the trembling guests gathered nearby. Dr. Finch’s medical bag lay open on the table, its contents disturbingly rearranged as if someone had searched it in haste. A single glove, stained crimson at the fingertips, was tucked behind the grandfather clock where no one should have noticed. The victim’s pocket watch had stopped at nine seventeen, the exact moment the first scream tore through the otherwise suffocating silence. Harlow’s gaze locked onto the shattered brandy glass, its fragments arranged in a pattern that felt deliberate rather than accidental.
created_at"2026-02-20T14:19:25.393Z" 2/20/2026, 2:19:25 PM
model"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency406
moderation_latency(null)
generation_time6212
tokens_prompt46
tokens_completion345
native_tokens_prompt39
native_tokens_completion260
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
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"stop"
usage0.0005356
router(null)
provider_responses
0
endpoint_id"13c5002b-8c5b-490c-8a5f-52ec0242804f"
id"2173cf115f9649c9893579b4df1e798e"
is_byokfalse
latency406
model_permaslug"mistralai/mistral-medium-3.1" 3/1/2001, 12:00:00 AM
provider_name"Mistral"
status200
api_type"completions"
id"gen-1771597165-AHbgd1p2AeHDnSpdjCZp"
upstream_id"2173cf115f9649c9893579b4df1e798e"
total_cost0.0005356
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
66.97% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
019
118
220
320
422
519
621
720
821
920