Run: 2026-10-07-01M4AT0CZV4JFHNHS5NG729TJC

Run Details

Duration:
2.2s
Cost:
$0.001832
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
14.51% 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 library fell silent as the clock struck midnight with an eerie, echoing chime through dusty shelves. Detective Harlow adjusted his glasses, scanning the dim room where shadows stretched like grasping, skeletal fingers. A single candle flickered on the mahogany desk, casting long, wavering shapes across the scattered, bloodstained papers. The victim lay sprawled near the fireplace, a silver letter opener buried deep in his motionless, pale chest. Thunder rumbled outside, shaking the stained-glass windows as rain began to lash against the ancient, creaking panes. Harlow knelt beside the body, noticing a torn scrap of fabric clutched tightly in the dead man’s stiff hand. The butler stood rigid by the door, his face unreadable, though his knuckles whitened around the brass doorknob. A faint scent of lavender lingered in the air, mingling with the metallic tang of fresh blood pooling on the Persian rug. Somewhere in the house, a floorboard groaned under the weight of unseen footsteps moving with deliberate, stealthy precision.
created_at"2026-10-07T09:09:43.044Z" 10/7/2026, 9:09:43 AM
model"mistralai/mistral-medium-3.5-20260430"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency265
moderation_latency(null)
generation_time2169
tokens_prompt46
tokens_completion269
native_tokens_prompt51
native_tokens_completion234
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)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
service_tier"default"
usage0.0018315
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791364183-399mNrm3yMUuyeo237yT"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791364183-FgfYJoRPM61BB0ZZD4GC"
upstream_id"2ce237eba02449378e1de261a07fddbe"
provider_responses
0
endpoint_id"d21d316f-d540-4718-b36e-3beff85d0cf9"
id"2ce237eba02449378e1de261a07fddbe"
is_byokfalse
latency265
model_permaslug"mistralai/mistral-medium-3.5-20260430"
provider_name"Mistral"
status200
total_cost0.0018315
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
14.51% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
018
116
217
318
417
519
618
722
818