Run: 2026-04-24-01KQ0N7693DJQ9K385D6FMGP23

Run Details

Duration:
13.1s
Cost:
$0.019885
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered Blackwood Manor as midnight swallowed the last carriage. The butler found Lady Vale beneath the chandelier, smiling bloodlessly. Her emerald necklace glittered beside one perfectly gloved, severed clue. Every clock in the house had stopped at twelve thirteen. Inspector Hargreaves arrived wearing mud, suspicion, and a black umbrella. Nobody admitted hearing screams, though thunder had conveniently rehearsed alibis. In the library, warm ashes hid a half burned photograph. Across its face, someone had written, She lied about everything. Then the dead woman coughed once, and everyone stepped back. Except her husband, whose shoes matched the mud outside exactly.
created_at"2026-04-24T21:09:34.633Z" 4/24/2026, 9:09:34 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency12403
moderation_latency(null)
generation_time12756
tokens_prompt46
tokens_completion584
native_tokens_prompt41
native_tokens_completion656
native_tokens_completion_images0
native_tokens_reasoning516
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"
usage0.019885
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_074787be3d9e315e0169ebdc0eb2d48197828a28de17319d95"
is_byokfalse
latency244
model_permaslug"openai/gpt-5.5-20260423"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777064974-MXC1Gm2bftuvuBsItIqN"
session_id(null)
api_type"completions"
id"gen-1777064974-yC5HICnnDaSKwvwiN61r"
upstream_id"resp_074787be3d9e315e0169ebdc0eb2d48197828a28de17319d95"
total_cost0.019885
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
310
410
510
610
710
810
910