Run: 2026-04-24-01KQ0PP5G5R76FFW30Y72PTNCG

Run Details

Duration:
12.0s
Cost:
$0.019975
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 before midnight. Inside, twelve guests applauded, unaware the pianist had stopped breathing. Her final chord shivered beneath the chandelier's trembling crystal teeth. Lord Vane raised his glass, then noticed the spreading darkness. A crimson ribbon unfurled from beneath Clara's white satin bodice. Someone screamed, and the storm swallowed most of the sound. Inspector Hale, dining incognito, set down his untouched soup slowly. He counted doors, faces, exits, lies already blooming everywhere tonight. The grandfather clock struck twelve, though its hands showed eleven. On Clara's wrist, a freshly inked raven glistened wetly tonight.
created_at"2026-04-24T21:35:13.931Z" 4/24/2026, 9:35:13 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency11434
moderation_latency(null)
generation_time11813
tokens_prompt46
tokens_completion497
native_tokens_prompt41
native_tokens_completion659
native_tokens_completion_images0
native_tokens_reasoning516
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"
usage0.019975
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_0343626acbc475e30169ebe211ff3881949cef198f07af44bb"
is_byokfalse
latency420
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-1777066513-xCo5OA4d0KJS01fbagxm"
session_id(null)
api_type"completions"
id"gen-1777066513-QYDxql5byLtEUEFBcUBl"
upstream_id"resp_0343626acbc475e30169ebe211ff3881949cef198f07af44bb"
total_cost0.019975
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