Run: 2026-09-03-01M1K4XBZDGS29J443KCPFF1XT

Run Details

Model:
Muse Spark 1.3 (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
29.2s
Cost:
$0.007698
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

AI
Rain lashed against the tall windows of Blackwood Manor as guests gathered nervously inside the dimly lit grand hall tonight. Detective Eleanor Vance examined the cold body sprawled near the fireplace while thunder echoed loudly through empty dark corridors outside. A shattered wine glass lay beside his outstretched hand, its crimson stain spreading slowly across polished ancient oak floorboards nearby. Nobody remembered hearing screams, yet every guest insisted they had remained together chatting quietly in adjacent dusty library all evening. Eleanor noticed muddy footprints leading toward the locked conservatory door, suggesting the clever killer still lurked somewhere within those walls.
created_at"2026-09-03T08:07:08.021Z" 9/3/2026, 8:07:08 AM
model"meta/muse-spark-1.3-20260902"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7260
moderation_latency(null)
generation_time29171
tokens_prompt46
tokens_completion233
native_tokens_prompt42
native_tokens_completion1799
native_tokens_completion_images0
native_tokens_reasoning1608
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
service_tier"auto"
usage0.00769825
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer(null)
request_id"req-1788422828-zMxll6PndHLq73Qx0PTu"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1788422828-Om07rK2LE52LEwCNSmuM"
upstream_id"resp_6a992aae2ef6b5d7a21d4011"
provider_responses
0
endpoint_id"cf4f1b4e-1719-4b65-9111-7dd7635e5a2f"
id"resp_6a992aae2ef6b5d7a21d4011"
is_byokfalse
latency2469
model_permaslug"meta/muse-spark-1.3-20260902"
provider_name"Meta"
status200
total_cost0.00769825
cache_discount(null)
upstream_inference_cost0
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
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420