Run: 2026-03-18-01KM08S0Q6TWFHQQ2SKREV20V9

Run Details

Model:
GPT-5.4 Mini (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
2.3s
Cost:
$0.002294
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Fog pressed against the mansion windows as midnight bells tolled. Detective Mara Vale stepped inside, tasting ash and old roses. A chandelier swung overhead, though no wind touched the room. At the staircase foot, Lord Ashbury lay unmoving beside blood. Every guest claimed innocence, yet their alibis frayed like silk. Mara knelt, noticing one wet footprint leading toward the library. Someone had killed tonight, and everyone in this house listened.
created_at"2026-03-18T10:45:01.813Z" 3/18/2026, 10:45:01 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2035
moderation_latency(null)
generation_time2171
tokens_prompt46
tokens_completion124
native_tokens_prompt41
native_tokens_completion503
native_tokens_completion_images0
native_tokens_reasoning405
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"
usage0.00229425
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_02b3729412e2a0b80169ba822de42c8190b6331407d9fccb73"
is_byokfalse
latency200
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-1773830701-UOvAOr04d90MW1bfpRqU"
upstream_id"resp_02b3729412e2a0b80169ba822de42c8190b6331407d9fccb73"
total_cost0.00229425
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
010
110
210
310
410
510
610