Run: 2026-03-06-01KK1H0VFND0VRP8CQ4ZX0C2VW

Run Details

Model:
GPT-5.4
Duration:
5.6s
Cost:
$0.001978
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
51.23% 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 needled the manor windows as guests arrived, clutching invitations embossed with black roses and the promise of reconciliation. Inside, candlelight trembled above silver trays while old grievances circulated politely, disguised as compliments, laughter, and inquiries about health. At precisely eight, the host descended smiling, though his valet noticed crimson on one cuff and fear behind charm. No one mentioned the storm-stranded bridge until thunder silenced conversation, and the library door eased open by itself. Then Mrs. Vale screamed, pointing inward, where Sir Alistair lay across the Persian rug, throat cut, wedding ring missing.
created_at"2026-03-06T12:12:39.805Z" 3/6/2026, 12:12:39 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency438
moderation_latency(null)
generation_time5587
tokens_prompt46
tokens_completion165
native_tokens_prompt41
native_tokens_completion125
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"
usage0.0019775
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_00a1995aba0f7a790169aac4b7de6c8197a73e9086863bb349"
is_byokfalse
latency180
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-1772799159-xdeky13b2XGsgfki4VQ0"
upstream_id"resp_00a1995aba0f7a790169aac4b7de6c8197a73e9086863bb349"
total_cost0.0019775
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
51.23% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
019
119
219
318
419