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Run: 2026-09-03-01M1K5JECWZQ136C68BTD0DWHH
Run Details
Model:
Muse Spark 1.2 (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
9.2s
Cost:
$0.009904
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's bookstore where Detective Harlan arrived precisely after midnight alone expecting another quiet uneventful night. The owner, Elias Marlowe, lay sprawled between fallen shelves, a brass letter opener buried deeply inside his chest still bleeding. Harlan noticed the front door remained locked from inside, suggesting the murderer had not entered through conventional means tonight somehow. Beside the victim's outstretched hand rested a single torn page, ink smeared despite desperate attempts at preservation from careless fingers. Harlan crouched carefully, reading four hastily scrawled words that chilled his blood more than winter's relentless wind ever could possibly. The message read simply, 'He never left the bookstore,' though every shelf suggested otherwise with chilling clarity tonight for detectives.
created_at
"2026-09-03T08:18:38.626Z"
9/3/2026, 8:18:38 AM
model
"meta/muse-spark-1.2-20260805"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
8694
moderation_latency
(null)
generation_time
9138
tokens_prompt
46
tokens_completion
219
native_tokens_prompt
42
native_tokens_completion
2318
native_tokens_completion_images
0
native_tokens_reasoning
2142
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
0.009904
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788423518-Lpvd8VaZ7kS0Hq1ULgAw"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788423518-EMlQng10ivkCvmzVzUA6"
upstream_id
"resp_6a992d5e877881a65f0a4b65"
provider_responses
0
endpoint_id
"ffc8e76e-808a-44d2-bd21-c6ac16e721cb"
id
"resp_6a992d5e877881a65f0a4b65"
is_byok
false
latency
327
model_permaslug
"meta/muse-spark-1.2-20260805"
provider_name
"Meta"
status
200
total_cost
0.009904
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
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20