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Run: 2026-09-03-01M1K5G939BMQ4FV3F5A8Z81BS
Run Details
Model:
Muse Spark 1.2 (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.2s
Cost:
$0.010274
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 lashed the isolated Cliffside Manor as Detective Mara Quinn arrived at midnight, answering a frantic telephone call for help. The butler opened the heavy oak door, his face pale, hands trembling violently despite his practiced composure and forced dignity. Inside, chandeliers flickered above the grand staircase where Lord Alistair Finch lay motionless, blood pooling beneath his head like wine. Three guests stood silently nearby, their evening gowns and tuxedos stained with rain, champagne, and something darker than anyone admitted. Mara knelt beside the body, noting the absence of a weapon and the faint smell of bitter almonds everywhere nearby. Someone had locked all the doors from the inside, meaning the killer remained trapped among them tonight without any escape.
created_at
"2026-09-03T08:17:27.665Z"
9/3/2026, 8:17:27 AM
model
"meta/muse-spark-1.2-20260805"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3205
moderation_latency
(null)
generation_time
10184
tokens_prompt
46
tokens_completion
221
native_tokens_prompt
42
native_tokens_completion
2405
native_tokens_completion_images
0
native_tokens_reasoning
2213
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
0.01027375
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788423447-5BBRVHD6C371Pe70gMWG"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788423447-3nVD0iSOLdmihnlgLpsl"
upstream_id
"resp_6a992d183be397479e5c4f68"
provider_responses
0
endpoint_id
"ffc8e76e-808a-44d2-bd21-c6ac16e721cb"
id
"resp_6a992d183be397479e5c4f68"
is_byok
false
latency
1510
model_permaslug
"meta/muse-spark-1.2-20260805"
provider_name
"Meta"
status
200
total_cost
0.01027375
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