Run: 2026-10-07-01M4AV3KYMNWETMH6TY9DFXSY0

Run Details

Model:
Mistral Medium 3.5
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1.8s
Cost:
$0.001022
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
20.26% 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 guests exchanged nervous glances, each one clutching their alibis like fragile, easily shattered glass in trembling hands. Outside, the storm raged violently, trapping everyone inside the mansion with the killer still lurking among them unseen.
created_at"2026-10-07T09:28:57.053Z" 10/7/2026, 9:28:57 AM
model"mistralai/mistral-medium-3.5-20260430"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency282
moderation_latency(null)
generation_time1818
tokens_prompt46
tokens_completion157
native_tokens_prompt51
native_tokens_completion126
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"
usage0.0010215
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791365337-fEjtUsnMboyoljVFCw7T"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791365337-YUNkp5JFCyZBOlmV7cCw"
upstream_id"36b15594aa5a420d9ed07802ff410fe6"
provider_responses
0
endpoint_id"d21d316f-d540-4718-b36e-3beff85d0cf9"
id"36b15594aa5a420d9ed07802ff410fe6"
is_byokfalse
latency282
model_permaslug"mistralai/mistral-medium-3.5-20260430"
provider_name"Mistral"
status200
total_cost0.0010215
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
20.26% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
019
116
218
318
418