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Run: 2026-11-11-01M75451QBQSTGEYMQ9781A2WW
Run Details
Model:
Muse Ember (Reasoning, Max)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.3s
Cost:
$0.001065
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
When detective Mara Ellison arrived at dawn, the isolated manor house already stood silent, windows shattered, and doors wide open. Rain had soaked the marble steps, yet fresh footprints led from the front hall toward the darkened library beyond them. Inside, Lord Edmund Blackwood lay motionless beside his old desk, a single silver letter opener buried deeply in his chest. His wife Clara trembled nearby, clutching bloody gloves, whispering that she never heard screams during the long dark stormy night. Mara noticed the window latch untouched, the fire still warm, and three muddy glasses waiting empty upon the polished desk. Somewhere upstairs, a floorboard creaked very softly twice, suggesting the killer might still be hiding silently within this house tonight.
created_at
"2026-11-11T10:58:39.99Z"
11/11/2026, 10:58:39 AM
model
"meta/muse-ember-20261109"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1420
moderation_latency
(null)
generation_time
3216
tokens_prompt
46
tokens_completion
244
native_tokens_prompt
43
native_tokens_completion
2122
native_tokens_completion_images
0
native_tokens_reasoning
1925
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
"default"
usage
0.0010653
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.22.2; linux; x64))"
http_referer
(null)
request_id
"req-1794394719-V8ipafYlBqhajF80ZtDR"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1794394719-U8J0GZzKDvdCHUCt5tXn"
upstream_id
"resp_6af44a60ed54f3138fa843a8"
provider_responses
0
endpoint_id
"ea8469c2-ddf8-4985-8cf2-f5dc7e63e14c"
id
"resp_6af44a60ed54f3138fa843a8"
is_byok
false
latency
469
model_permaslug
"meta/muse-ember-20261109"
provider_name
"Meta"
status
200
total_cost
0.0010653
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