Run: 2026-10-07-01M4AVM11PDD81SBNZ2P6EPY4C

Run Details

Duration:
1.9s
Cost:
$0.001262
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
33.55% 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 glasses, scanning the shadowed shelves where the victim’s body lay sprawled unnaturally. A single bloodstained letter opener glinted under the flickering gaslight, its handle carved with an intricate, unfamiliar crest. The butler’s trembling hands clutched a silver tray, his pale face betraying more than mere shock at the grim discovery. Whispers slithered between the gathered guests, each suspect’s alibi crumbling like the ancient parchment scattered near the corpse. Outside, the storm raged violently, the wind howling through broken windows as if mourning the library’s lost peace.
created_at"2026-10-07T09:37:54.749Z" 10/7/2026, 9:37:54 AM
model"mistralai/mistral-medium-3.5-20260430"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency333
moderation_latency(null)
generation_time1813
tokens_prompt46
tokens_completion190
native_tokens_prompt51
native_tokens_completion158
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"
usage0.0012615
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791365874-U7SU86V8sIZ3LiR0yftb"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791365874-iL7Yu2KHgHC5J1tYULFL"
upstream_id"c936804d83dc45c5a99654194c80fc49"
provider_responses
0
endpoint_id"38ef23a9-5cb3-46fa-85ec-7aed174f04eb"
id"c936804d83dc45c5a99654194c80fc49"
is_byokfalse
latency333
model_permaslug"mistralai/mistral-medium-3.5-20260430"
provider_name"Mistral"
status200
total_cost0.0012615
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
33.55% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
116
218
320
418
518