Run: 2026-02-08-01KGYXR21DQZG0ZJS30MWZEV53

Run Details

Duration:
2.3s
Cost:
$0.000126
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
0.22% 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 rain fell in silver sheets over Blackthorn Manor that evening**, as the old grandfather clock struck midnight with a hollow, echoing chime. **A single candle flickered in the library, casting long shadows across the leather-bound books**, while the scent of aged parchment and damp wood filled the heavy silence. **Detective Elias Vane adjusted his gloves, his breath visible in the frigid air**, as he studied the crimson stain spreading across the Persian rug beneath him. **The victim—a wealthy industrialist named Reginald Holloway—lay sprawled near the fireplace**, his glassy eyes fixed on the ceiling as if frozen in silent accusation. **A silver letter opener, its blade glinting under the dim light, rested near his outstretched hand**, its handle wrapped in what looked like fine, embroidered silk. **The butler, a gaunt man with trembling fingers, stood in the doorway, his face ashen**, whispering, *"I heard nothing, sir, until the scream—then only silence followed."* **Vane knelt, his sharp eyes tracing the room for clues, noting the overturned decanter**, its contents spilled like dark blood across the mahogany desk’s polished surface. **A single playing card—the ace of spades—lay face-up beside the body**, its edges slightly singed, as if plucked from a fire moments too late. **The detective’s gaze lingered on the grand portrait above the mantel, where Holloway’s cold smile**, seemed to mock the chaos below, its frame slightly askew as though disturbed. **Footsteps echoed in the hallway, slow and deliberate, before Inspector Clara Graves appeared**, her expression unreadable beneath the brim of her dampened hat. **She crouched beside Vane, her voice low and steady, *"This wasn’t just murder—it was a message,"*** as the wind howled outside, rattling the manor’s ancient, leaded windows.
created_at"2026-02-08T15:25:59.067321+00:00" 2/8/2026, 3:25:59 PM
model"mistralai/mistral-small-creative-20251216"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency240
moderation_latency(null)
generation_time2032
tokens_prompt35
tokens_completion397
native_tokens_prompt39
native_tokens_completion407
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"
usage0.000126
router(null)
provider_responses
0
id"acc6cab0fef6482bad24763e8765f585"
status200
is_byokfalse
latency240
endpoint_id"0118a65e-79f9-48b0-924e-38c4a41378e1"
provider_name"Mistral"
model_permaslug"mistralai/mistral-small-creative-20251216"
api_type"completions"
id"gen-1770564356-84cvBmtlq4IBknGsYWiY"
upstream_id"acc6cab0fef6482bad24763e8765f585"
total_cost0.000126
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
0.22% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
023
127
226
326
426
553
626
728
823
928