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Run: 2026-09-03-01M1K5BTRPC7TMG6FTPDD327PV
Run Details
Model:
Muse Spark 1.3 (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
27.4s
Cost:
$0.010788
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
Detective Elena Marsh arrived at Blackwood Manor shortly after midnight, hearing rain pounding relentlessly against the ancient stone walls outside. The butler opened the heavy oak door slowly, his pale face trembling as he whispered master lay dead upstairs tonight. Elena followed him through dim candlelit hallway, noticing broken glass scattered near portrait of late Lady Blackwood smiling coldly down. Inside the library, Lord Blackwood slumped over his desk, blood pooling beneath silver letter opener lodged within chest still bleeding. She noticed window wide open, curtains billowing wildly, muddy footprints leading toward garden maze shrouded in thick fog tonight silently.
created_at
"2026-09-03T08:15:01.917Z"
9/3/2026, 8:15:01 AM
model
"meta/muse-spark-1.3-20260902"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4716
moderation_latency
(null)
generation_time
27341
tokens_prompt
46
tokens_completion
246
native_tokens_prompt
42
native_tokens_completion
2535
native_tokens_completion_images
0
native_tokens_reasoning
2330
native_tokens_cached
35
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
0.01078775
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788423301-eW89LrHwswK4rqjdnCPn"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788423301-ygO3fRAxItSkAfKL8spu"
upstream_id
"resp_6a992c86749fc221df264f53"
provider_responses
0
endpoint_id
"cf4f1b4e-1719-4b65-9111-7dd7635e5a2f"
id
"resp_6a992c86749fc221df264f53"
is_byok
false
latency
487
model_permaslug
"meta/muse-spark-1.3-20260902"
provider_name
"Meta"
status
200
total_cost
0.01078775
cache_discount
0.0000385
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