Run: 2026-03-06-01KK1JCMGYHGDKSQM05JQMYSFG

Run Details

Model:
GPT-5.4
Duration:
4.2s
Cost:
$0.001948
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
66.97% 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
At dusk, the manor breathed quietly, windows glowing amber while rain stitched silver threads across the sleeping, watchful gardens below. Guests gathered in the drawing room, smiling too brightly, their laughter brittle as glass beneath the grandfather clock's measured accusations. When Lady Vale raised her crystal goblet for silence, thunder answered first, and someone unseen extinguished every candle instantly. Darkness swallowed the room completely; then came a gasp, a crash, and one terrible note from the violin. Lightning revealed Lady Vale collapsed beside the hearth, scarlet blooming through silk, while every guest stared at someone else.
created_at"2026-03-06T12:36:34.471Z" 3/6/2026, 12:36:34 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency461
moderation_latency(null)
generation_time4180
tokens_prompt46
tokens_completion167
native_tokens_prompt41
native_tokens_completion123
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"
usage0.0019475
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_01d828ec70a41f9d0169aaca5287588193b80b415e7e04e3da"
is_byokfalse
latency150
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-1772800594-Xq1GAnyL3nYWQ50gY0g6"
upstream_id"resp_01d828ec70a41f9d0169aaca5287588193b80b415e7e04e3da"
total_cost0.0019475
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
66.97% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
219
318
419