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Run: 2026-09-03-01M1K4SDZSHGXXMMXB4115FCC0
Run Details
Model:
Muse Spark 1.2 (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
15.0s
Cost:
$0.009385
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
Messages
Meta
AI
Rain hammered the cobblestones outside Marlowe House as Detective Crowe arrived exactly at midnight expecting routine burglary investigation call alone. Instead the butler opened the door, pale and trembling, whispering that Lord Pemberton lay dead upstairs in the library tonight. Crowe followed silently upstairs, noting muddy footprints staining the carpet despite supposedly locked windows and bolted doors inside silent mansion. The victim sprawled across his mahogany desk, eyes wide open, clutching a torn playing card soaked in blood still warm. The fireplace crackled nearby, illuminating three nervous guests already assembled, each insisting they heard nothing unusual tonight before midnight struck.
created_at
"2026-09-03T08:04:59.008Z"
9/3/2026, 8:04:59 AM
model
"meta/muse-spark-1.2-20260805"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3900
moderation_latency
(null)
generation_time
14957
tokens_prompt
46
tokens_completion
250
native_tokens_prompt
42
native_tokens_completion
2196
native_tokens_completion_images
0
native_tokens_reasoning
1985
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
service_tier
"auto"
usage
0.0093855
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788422699-Y0jo09d3KyRdOEMaEcH4"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788422699-qtneucdeg7jNee83Q2f3"
upstream_id
"resp_6a992a2b3161253240124c60"
provider_responses
0
endpoint_id
"ffc8e76e-808a-44d2-bd21-c6ac16e721cb"
id
"resp_6a992a2b3161253240124c60"
is_byok
false
latency
431
model_permaslug
"meta/muse-spark-1.2-20260805"
provider_name
"Meta"
status
200
total_cost
0.0093855
cache_discount
(null)
upstream_inference_cost
0
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
neededClean
false
sentences
5
wordCounts
0
20
1
20
2
20
3
20
4
20