Run: 2026-10-07-01M4ASJ4R39CPZJMPPFAD7EXN1

Run Details

Duration:
1.9s
Cost:
$0.001277
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
42.88% 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 the dusty halls. Detective Harlow adjusted his coat, eyes scanning the shadows where the victim’s body lay sprawled unnaturally near the fireplace. A single bloodstained letter opener glinted under the flickering candlelight, its handle carved with an intricate, unfamiliar crest. The butler’s hands trembled as he clutched a silver tray, his usual composure shattered by the night’s grim discovery. Whispers spread among the guests, each suspecting another while the storm outside rattled the stained-glass windows ominously. A faint scent of lavender lingered in the air, perhaps from the victim’s perfume or the killer’s deliberate distraction.
created_at"2026-10-07T09:01:56.042Z" 10/7/2026, 9:01:56 AM
model"mistralai/mistral-medium-3.5-20260430"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency298
moderation_latency(null)
generation_time1622
tokens_prompt46
tokens_completion194
native_tokens_prompt51
native_tokens_completion160
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"
usage0.0012765
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791363716-ejXW1CMpXGADR4uwNs99"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791363716-snU2GBxnE0GoHh9HtGGz"
upstream_id"caf8809ec47c47d1abdc7ce0b3912957"
provider_responses
0
endpoint_id"d21d316f-d540-4718-b36e-3beff85d0cf9"
id"caf8809ec47c47d1abdc7ce0b3912957"
is_byokfalse
latency289
model_permaslug"mistralai/mistral-medium-3.5-20260430"
provider_name"Mistral"
status200
total_cost0.0012765
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
42.88% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
119
218
319
417
519