Run: 2026-03-18-01KM0AKW046D58CHHV2VZQW78S

Run Details

Model:
Mistral Small 4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
36.1s
Cost:
$0.003732
Provider:
Mistral

Evaluation summary

Score Evaluator
Details Link
93.44% 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
Therain lashed violently against the manor's gloomy windows on that fateful October evening as thunder echoed through the halls. The guests huddled nervously in the dimly lit drawing room drinking tea as they waited for the host to arrive. The fire in the hearth flickered ominously casting its eerie light on the frightened faces of all the guests present. The grandfather clock struck midnight resonating throughout the vast mansion as a chilling reminder of the hours passing inexorably by. The butler entered swiftly with grim news announcing the host's delay which only intensified the guests' mounting unease and fear. Exchanging uneasy glances they now all whispered amongst themselves about the host's mysterious absence preoccupying their confused and fearful thoughts.
created_at"2026-03-18T11:17:10.287Z" 3/18/2026, 11:17:10 AM
model"mistralai/mistral-small-2603" 1/1/2603, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency420
moderation_latency(null)
generation_time35997
tokens_prompt46
tokens_completion5447
native_tokens_prompt51
native_tokens_completion6208
native_tokens_completion_images(null)
native_tokens_reasoning5252
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
usage0.00373245
router(null)
provider_responses
0
endpoint_id"f5ed6283-4e17-457d-98cd-2ec0c318171d"
id"b1b30fa220d9408babcba5e448ed7f62"
is_byokfalse
latency399
model_permaslug"mistralai/mistral-small-2603" 1/1/2603, 12:00:00 AM
provider_name"Mistral"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773832630-VPe1WA1uD4YYdSw9ybzP"
upstream_id"b1b30fa220d9408babcba5e448ed7f62"
total_cost0.00373245
cache_discount(null)
upstream_inference_cost0
provider_name"Mistral"

Evaluation details

Result Evaluator Details Meta Data
93.44% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
120
220
320
420
520