Run: 2026-07-09-01KX41567X3N3SGEQNKQKN1FDP

Run Details

Duration:
10.4s
Cost:
$0.021298
Provider:
OpenAI

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 stitched silver seams across Blackwater Manor as Detective Mara Venn arrived, carrying a warrant and an unwelcome memory inside. Inside, the annual masquerade had stopped mid-waltz, masks turning toward the library where Lord Harrow lay beneath shattered glass silently. His white fox mask concealed nothing now; a brass letter opener protruded from his chest like a grotesque invitation tonight. Guests whispered names, but Mara watched the butler, whose immaculate gloves were wet despite the fire's crackling warmth nearby inside. On the mantel, a stopped clock displayed eleven thirteen, while every witness insisted the scream had sounded at midnight precisely. Mara bent beside the body and found a smear of blue wax beneath Harrow's perfectly manicured fingernails there unmistakably fresh. Across the room, Lady Celia smiled behind her raven mask, although tears glittered along the knife-shaped pendant at her throat. Then the dead man's pocket watch chimed once, and every masked guest heard a child laughing somewhere beneath the floorboards.
created_at"2026-07-09T18:10:06.215Z" 7/9/2026, 6:10:06 PM
model"openai/gpt-5.6-terra-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9541
moderation_latency(null)
generation_time10188
tokens_prompt46
tokens_completion281
native_tokens_prompt41
native_tokens_completion1413
native_tokens_completion_images0
native_tokens_reasoning1196
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"default"
usage0.0212975
router(null)
provider_responses
0
endpoint_id"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id"resp_036ce99fc211b17f016a4fe3fe57288190b0e44387c38d2798"
is_byokfalse
latency246
model_permaslug"openai/gpt-5.6-terra-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783620606-cnogu9Hb67KgC9Rk5MiC"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620606-uyDtH2B3ORdFgVoM6ySn"
upstream_id"resp_036ce99fc211b17f016a4fe3fe57288190b0e44387c38d2798"
total_cost0.0212975
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
520
620
720