Run: 2026-03-18-01KM08M6JH7N0908NGSF6JKT7W

Run Details

Duration:
3.8s
Cost:
$0.001001
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
The rain hammered Ellery Quay, while Inspector Marlowe waited beside the silent carriage house behind Captain Voss's estate tonight alone. A servant whispered that Voss vanished after dinner, and now his study door lay unlocked, slightly ajar for hours straight. Marlowe lifted the lantern, noting fresh boot prints leading inward, then stopping abruptly at scattered rose petals near a drain. Inside, the air smelled of clove cigarettes, yet the windows were bolted shut against the storm outside all night long. On the desk, a bloodless knife rested beside Voss's journal, its pages torn neatly, like deliberate curtains for deception only. When Marlowe found Voss on the hearth rug, his pulse was gone, and everyone pretended surprise at the wrong moment.
created_at"2026-03-18T10:42:23.966Z" 3/18/2026, 10:42:23 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3439
moderation_latency(null)
generation_time3726
tokens_prompt46
tokens_completion196
native_tokens_prompt41
native_tokens_completion794
native_tokens_completion_images0
native_tokens_reasoning626
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"
usage0.0010007
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_081b32a502dd17380169ba819005e48195815c6d9bb2a1f0dc"
is_byokfalse
latency213
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-1773830543-fSqinBlzGGDxnFYJP8U4"
upstream_id"resp_081b32a502dd17380169ba819005e48195815c6d9bb2a1f0dc"
total_cost0.0010007
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