Run: 2026-03-09-01KKAC2BDXA49S4E29556CHCY2

Run Details

Duration:
8.2s
Cost:
$0.009132
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
Rain worried the stained windows of Blackthorn Hall as guests gathered beneath chandeliers, pretending the storm outside was merely atmospheric. At the stroke of eleven, Lady Winterrose raised her glass, smiling too brightly, while the butler locked every door himself. No one noticed the violinist stop playing until a single scream severed the toast and sent crystal trembling on tables. Lady Winterrose lay across the Persian carpet, throat opened neatly, her ruby necklace broken like punctuation marking some terrible secret. Inspector Vale, arriving late and soaked through, removed his gloves, surveyed the silent room, and asked who had left first.
created_at"2026-03-09T22:39:15.911Z" 3/9/2026, 10:39:15 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7436
moderation_latency(null)
generation_time8111
tokens_prompt46
tokens_completion167
native_tokens_prompt41
native_tokens_completion602
native_tokens_completion_images0
native_tokens_reasoning474
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"
usage0.0091325
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0beae1f9dac932f80169af4c13fb508196b9749f056d65ab93"
is_byokfalse
latency212
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-1773095955-DFSmqUXCqDaazEcYuwKv"
upstream_id"resp_0beae1f9dac932f80169af4c13fb508196b9749f056d65ab93"
total_cost0.0091325
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420