Run: 2026-03-18-01KM0ATDFV4XH6PVQ9V8VCM1EV

Run Details

Duration:
4.7s
Cost:
$0.001209
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
Dusk settled over Briar Hollow as Detective Mara Keene arrived, summoned by shrieks from the locked riverside conservatory tonight alone. Inside, gaslights flickered, casting shadows across orchids, and Constable Weller hovered, clutching a damp brass keyring for the door's security. The victim, Elias Thorne, lay beside a shattered fountain, one glove missing, the rest pinned by spilled ink onto marble. Mara studied the lock plates; none showed forced entry, yet a thin smell of almonds lingered under every opened breeze. Weller whispered that Thorne had hosted an auction, and two guests vanished before the storm hit without leaving any messages. A telegram sat unopened on his desk, addressed to Mara in unfamiliar handwriting, stamped with crimson wax from the future.
created_at"2026-03-18T11:20:44.808Z" 3/18/2026, 11:20:44 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4162
moderation_latency(null)
generation_time4166
tokens_prompt46
tokens_completion201
native_tokens_prompt41
native_tokens_completion961
native_tokens_completion_images0
native_tokens_reasoning792
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"
usage0.00120945
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_09b9980f54682d080169ba8a8ce46c81949ccafb0f63530c4d"
is_byokfalse
latency105
model_permaslug"openai/gpt-5.4-nano-20260317"
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-1773832844-RvZoFHj3b7Bzbn0b30W0"
upstream_id"resp_09b9980f54682d080169ba8a8ce46c81949ccafb0f63530c4d"
total_cost0.00120945
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520