Run: 2026-04-24-01KQ0MVAXK3SH4YZSHTPDF0892

Run Details

Duration:
16.1s
Cost:
$0.034285
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
Rain stitched silver threads across Blackthorn Manor's windows after midnight. Detective Mara Vale arrived before the servants began screaming upstairs. The butler opened the door with bloodless, trembling hands slowly. Behind him, candlelight shivered over portraits of unsmiling Blackthorn ancestors. Lord Blackthorn lay dead in the library beside scattered letters. His white dinner jacket bloomed red around a silver dagger. A stopped clock accused everyone from the mantelpiece, hands raised. Mara noticed wet footprints ending neatly beneath the locked window. No rain had entered; the sill remained dusty and untouched. Somewhere above, a woman's laugh broke, then became a sob.
created_at"2026-04-24T21:03:06.176Z" 4/24/2026, 9:03:06 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency15340
moderation_latency(null)
generation_time15908
tokens_prompt46
tokens_completion178
native_tokens_prompt41
native_tokens_completion1136
native_tokens_completion_images0
native_tokens_reasoning999
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.034285
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_087d68a22ae52b320169ebda8a4a0c8195a8dd59331465ac08"
is_byokfalse
latency324
model_permaslug"openai/gpt-5.5-20260423"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777064586-JpNrsk8v2m5wpsBIfS0O"
session_id(null)
api_type"completions"
id"gen-1777064586-eLoeziVkDCfVhEd7lDXe"
upstream_id"resp_087d68a22ae52b320169ebda8a4a0c8195a8dd59331465ac08"
total_cost0.034285
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
310
410
510
610
710
810
910