Run: 2026-07-09-01KX40GCXZE7FGA6WYS5W44531

Run Details

Duration:
10.3s
Cost:
$0.019557
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 hammered Blackthorn Manor as Detective Mara Venn arrived, carrying a damp invitation and an instinctive distrust of wealthy hosts. Inside, eleven guests watched the grandfather clock, whose brass hands trembled strangely at precisely midnight beside the silent dining fireplace. Their host, Sir Alistair Quill, had promised revelations concerning an old disappearance and several inconvenient inheritances before serving supper tonight. Instead, the lights failed, the clock chimed once, and someone screamed behind the locked library door for no apparent reason. When candles flared, Quill lay sprawled beneath his portrait, a silver letter opener buried deeply beneath his left rib cage. Nobody had entered or left, according to the butler, although every guest suddenly remembered hearing something different during the blackout. Mara knelt beside the corpse, noticing mud on Quill's cuffs and one missing pearl from Lady Fane's necklace that evening. Then the dead man's pocket watch began ticking, though its cracked face showed an hour yet to come for everyone. Outside, thunder concealed the sound of a carriage departing, leaving fresh wheel tracks beneath the eastern windows in wet gravel. Mara looked toward them, then at the guests, and understood the murderer had planned for her arrival from the beginning.
created_at"2026-07-09T17:58:44.935Z" 7/9/2026, 5:58:44 PM
model"openai/gpt-5.6-terra-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9528
moderation_latency(null)
generation_time10065
tokens_prompt46
tokens_completion352
native_tokens_prompt41
native_tokens_completion1297
native_tokens_completion_images0
native_tokens_reasoning1034
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"
usage0.0195575
router(null)
provider_responses
0
endpoint_id"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id"resp_0b14fbafd5a0a4c6016a4fe1550050819597eea6d736d0247b"
is_byokfalse
latency207
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-1783619924-lV5sQXtQd8Kw0pvokym1"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619924-iVuGFgNZrUIpUyycaq39"
upstream_id"resp_0b14fbafd5a0a4c6016a4fe1550050819597eea6d736d0247b"
total_cost0.0195575
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
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920