Run: 2026-03-06-01KK1HC4PXP51EPVJCZW2EQEQY

Run Details

Model:
GPT-5.4
Duration:
4.8s
Cost:
$0.002203
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
89.63% 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 glazed Blackthorn Manor as mourners gathered beneath iron lanterns. Lady Vale arrived late, her veil snagged on bramble thorns. Inside, the grandfather clock coughed midnight, though supper had ended. A violin whispered upstairs, where no musician had slept. Servants exchanged glances, then lowered eyes toward polished floorboards. Detective Rowan Pike noticed mud staining the marble foyer. No carriage should have crossed the washed-out eastern bridge tonight. Then Aunt Eugenia screamed, dropping her silver gospel onto tiles. In the library, Lord Halberd slumped beside extinguished embers, lifeless. A chess king rested inside his open, bloodless hand.
created_at"2026-03-06T12:18:49.701Z" 3/6/2026, 12:18:49 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency527
moderation_latency(null)
generation_time4740
tokens_prompt46
tokens_completion173
native_tokens_prompt41
native_tokens_completion140
native_tokens_completion_images0
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0022025
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0f8507d6fcaf37c70169aac629c7a08196b1d435759712bbee"
is_byokfalse
latency154
model_permaslug"openai/gpt-5.4-20260305"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1772799529-66knbP963Or8FnEVqs7g"
upstream_id"resp_0f8507d6fcaf37c70169aac629c7a08196b1d435759712bbee"
total_cost0.0022025
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
89.63% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
39
49
59
610
710
810
99