Run: 2026-03-18-01KM08PCKENTEXTERPMK032PN9

Run Details

Duration:
3.3s
Cost:
$0.000844
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 etched silver paths on Hawthorne Manor, where guests gathered for midnight supper after the séance ended quietly tonight. Sir Lionel insisted the locked study be opened, insisting his late brother's violin case held vital clues for everyone present. When the butler produced a key, smoke curled from the hearth, though no fire burned at all in that room. A scream pierced the hall; Cassandra Vale fled the staircase clutching a pearl-handled dagger and trembling without any further explanation. Inside the study, Dr. Mercer lay facedown, ink spilled beside him, while the others watched the clock strike thirteen once.
created_at"2026-03-18T10:43:35.674Z" 3/18/2026, 10:43:35 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3008
moderation_latency(null)
generation_time3245
tokens_prompt46
tokens_completion163
native_tokens_prompt41
native_tokens_completion669
native_tokens_completion_images0
native_tokens_reasoning538
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"
usage0.00084445
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_094b548e1be149820169ba81d7bdc881978ad867843e57dccc"
is_byokfalse
latency215
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-1773830615-6rzVZfrB5nYvcZXAiRLG"
upstream_id"resp_094b548e1be149820169ba81d7bdc881978ad867843e57dccc"
total_cost0.00084445
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