Run: 2026-09-03-01M1K5ACCEEAY05ZXZHMTX5YGE

Run Details

Model:
Muse Spark 1.2 (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
9.9s
Cost:
$0.009083
Provider:
Meta

Evaluation summary

Score Evaluator
Details Link
100.00% 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
Detective Mara Quinn entered the silent library precisely at midnight, noticing shattered glass scattered across marble floors beneath flickering chandeliers. The victim, renowned historian Elias Thorne, lay sprawled beside overturned shelves, his throat bearing unmistakable crimson ligature marks still glistening. Beside his clenched fist rested a torn vellum page, its ancient Latin text smeared with fresh blood drying slowly nearby. The locked doors and sealed windows suggested impossibility, yet someone had undeniably murdered Thorne inside this chamber without leaving footprints. Quinn knelt carefully, inhaling coppery air, and whispered that every perfect locked room hides one deliberate mistake waiting patiently nearby.
created_at"2026-09-03T08:14:14.419Z" 9/3/2026, 8:14:14 AM
model"meta/muse-spark-1.2-20260805"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2878
moderation_latency(null)
generation_time9894
tokens_prompt46
tokens_completion234
native_tokens_prompt42
native_tokens_completion2134
native_tokens_completion_images0
native_tokens_reasoning1941
native_tokens_cached35
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"completed"
service_tier"auto"
usage0.0090835
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer(null)
request_id"req-1788423254-85iekSwxNfPhAbIxZeCX"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1788423254-N56XRcwaKz6UYnS6mdho"
upstream_id"resp_6a992c56a7b4bcae9a1240e9"
provider_responses
0
endpoint_id"ffc8e76e-808a-44d2-bd21-c6ac16e721cb"
id"resp_6a992c56a7b4bcae9a1240e9"
is_byokfalse
latency333
model_permaslug"meta/muse-spark-1.2-20260805"
provider_name"Meta"
status200
total_cost0.0090835
cache_discount0.0000385
upstream_inference_cost0
provider_name"Meta"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420