Run: 2026-04-24-01KQ0N1TFFFWGSWQ9TVHBX7Z8G

Run Details

Model:
GPT-5.5
Duration:
5.2s
Cost:
$0.004105
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
89.63% 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 needled the windows as Inspector Vale entered Ashbourne Hall. Twelve guests watched silently, their champagne forgotten beside cooling plates. At midnight, the grandfather clock began striking without its pendulum. Then Lady Marwick screamed from behind the locked library door. Vale forced it open, revealing Sir Julian facedown, bloodless, smiling. In his hand lay a violet ribbon, freshly torn. Every guest denied knowing why the ribbon smelled of smoke. Outside, muddy footprints circled the house, then simply vanished. Above the mantel, a portrait had been slashed open. Inside its canvas, Vale found one word: forgive me.
created_at"2026-04-24T21:06:38.709Z" 4/24/2026, 9:06:38 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1207
moderation_latency(null)
generation_time4643
tokens_prompt46
tokens_completion165
native_tokens_prompt41
native_tokens_completion130
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.004105
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_070745fe2760d43e0169ebdb5ecf1c8197af61c8d718749ef4"
is_byokfalse
latency303
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-1777064798-UEzyNWslFvS71KNNFqb5"
session_id(null)
api_type"completions"
id"gen-1777064798-4VDrcIBc0CnziYy7fOk7"
upstream_id"resp_070745fe2760d43e0169ebdb5ecf1c8197af61c8d718749ef4"
total_cost0.004105
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
89.63% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
310
410
59
610
79
89
99