Run: 2026-09-25-01M3CKE9CZVSYQ3XXNE2F41GES

Run Details

Model:
Mistral Medium 3.5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1.7s
Cost:
$0.001216
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
34.84% 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 of betrayal and hidden fortunes swirled among the guests, each one a suspect with secrets buried deep. Outside, the storm raged violently, trapping everyone inside the mansion with the killer still among them.
created_at"2026-09-25T15:37:45.147Z" 9/25/2026, 3:37:45 PM
model"mistralai/mistral-medium-3.5-20260430"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency357
moderation_latency(null)
generation_time1642
tokens_prompt46
tokens_completion185
native_tokens_prompt51
native_tokens_completion152
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"
usage0.0012165
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790350665-zDOUNbOYKz7XSaicajo3"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790350665-jeQk89HEHV3OPecAUw8m"
upstream_id"0bd18a2a945345c389cf349e4bc90b59"
provider_responses
0
endpoint_id"38ef23a9-5cb3-46fa-85ec-7aed174f04eb"
id"0bd18a2a945345c389cf349e4bc90b59"
is_byokfalse
latency357
model_permaslug"mistralai/mistral-medium-3.5-20260430"
provider_name"Mistral"
status200
total_cost0.0012165
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
34.84% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
119
218
319
418
516