Run: 2026-07-25-01KYD56TDJ6SFKEM0M1AFE2V6T

Run Details

Duration:
8.3s
Cost:
$0.006513
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
The lighthouse keeper never missed his morning signal, until today when silence screamed louder than any storm winds ever could. Detective Mara Quinn arrived before dawn, her boots crunching frost, coffee steaming, intuition already whispering that something felt terribly wrong. The iron door stood ajar, revealing blood smeared across cold stone steps leading upward toward the extinguished lantern room above. Inside, the keeper lay sprawled beneath shattered glass, one hand clutching a brass key, the other frozen mid-reach toward darkness. Mara knelt silently, noticing unfamiliar footprints leading away from the body toward darkness where someone still waited inside the tower.
created_at"2026-07-25T17:29:45.658Z" 7/25/2026, 5:29:45 PM
model"meta/muse-spark-1.1-20260709"
app_id182717
external_user(null)
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cancelledfalse
latency7737
moderation_latency(null)
generation_time8284
tokens_prompt46
tokens_completion174
native_tokens_prompt199
native_tokens_completion1474
native_tokens_completion_images0
native_tokens_reasoning1331
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"
usage0.00651325
router(null)
provider_responses
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endpoint_id"b2b9f6f9-8880-41c1-bd0c-867650fd5238"
id"resp_6a64f289c95978439986459f"
is_byokfalse
latency327
model_permaslug"meta/muse-spark-1.1-20260709"
provider_name"Meta"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1785000585-g26S91yZ74hvHp7U4JZ1"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1785000585-NCu78iY59IhjTkbmSL13"
upstream_id"resp_6a64f289c95978439986459f"
total_cost0.00651325
cache_discount(null)
upstream_inference_cost0
provider_name"Meta"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420