Run: 2026-04-24-01KQ0Q1M1B2B8G4B3TH58RMWDF

Run Details

Model:
GPT-5.5
Duration:
6.1s
Cost:
$0.003595
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
79.84% 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 combed the windows as Inspector Vale entered Blackthorn Manor. Inside, the grandfather clock stuttered, then surrendered completely to silence. Lady Marrow lay beneath portraits, one gloved hand crimson. No one screamed, though twelve guests watched from shadows. On the table, a teacup steamed beside her untouched. Vale noticed the sugar bowl contained pearls, not sugar. Outside, carriage wheels faded toward the moor's rising fog. He closed the door and counted every frightened face. One place at dinner remained set for nobody living.
created_at"2026-04-24T21:41:29.272Z" 4/24/2026, 9:41:29 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2737
moderation_latency(null)
generation_time5959
tokens_prompt46
tokens_completion143
native_tokens_prompt41
native_tokens_completion113
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"
usage0.003595
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_0648d192cc4dabc80169ebe3897e1481978cfd037b5bd8fb88"
is_byokfalse
latency2027
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-1777066889-LrkgJ2XtQ3KR7Ilk7oKl"
session_id(null)
api_type"completions"
id"gen-1777066889-GWjrgEcKwH1nD77bYu3V"
upstream_id"resp_0648d192cc4dabc80169ebe3897e1481978cfd037b5bd8fb88"
total_cost0.003595
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
79.84% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
010
110
29
39
49
59
69
79
89