Run: 2026-03-18-01KM091TF9WM1N44R15FVYBXPB

Run Details

Duration:
4.8s
Cost:
$0.004828
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 stitched silver threads across Blackmere Manor as Inspector Vale climbed the steps, noticing one upstairs window glowing red still. Inside, servants stood frozen beside the chandelier, while Mrs. Blackmere whispered that her husband had vanished during dinner upstairs tonight. Vale followed blood droplets along the corridor, each bead reflecting portraits whose painted eyes seemed strangely accusatory in the dimness. At the library door, he found the body, seated upright, a letter opener buried beneath the ribs like an accusation. On the desk, a chessboard waited with missing pieces, and beside it lay a note signed only, “Checkmate,” in red.
created_at"2026-03-18T10:49:50.325Z" 3/18/2026, 10:49:50 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4483
moderation_latency(null)
generation_time4666
tokens_prompt46
tokens_completion172
native_tokens_prompt41
native_tokens_completion1066
native_tokens_completion_images0
native_tokens_reasoning936
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"
usage0.00482775
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_05ccfdb152e0bc460169ba834e62788194b87efcea32ef5527"
is_byokfalse
latency231
model_permaslug"openai/gpt-5.4-mini-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-1773830990-7DfueMkedFMXM32UqumM"
upstream_id"resp_05ccfdb152e0bc460169ba834e62788194b87efcea32ef5527"
total_cost0.00482775
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