Run: 2026-04-24-01KQ0NF0TA3MVEW7V27WVVNPX0

Run Details

Model:
GPT-5.5
Duration:
2.9s
Cost:
$0.002335
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
79.27% 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 midnight entered Blackthorn Manor silently. Inspector Vale arrived alone, carrying questions beneath his overcoat. The butler waited trembling, beside a silver breakfast tray. On it, Lord Blackthorn's signet ring gleamed wetly red. Upstairs, someone laughed once, then every candle extinguished together.
created_at"2026-04-24T21:13:51.204Z" 4/24/2026, 9:13:51 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency714
moderation_latency(null)
generation_time2819
tokens_prompt46
tokens_completion86
native_tokens_prompt41
native_tokens_completion71
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"
usage0.002335
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_05230510f64e73a70169ebdd0f4cb881939f8ae29e6375b42c"
is_byokfalse
latency261
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-1777065231-yUOLd7SkT0ggET962tNP"
session_id(null)
api_type"completions"
id"gen-1777065231-A79GdcViyZl9wZ5XVYyh"
upstream_id"resp_05230510f64e73a70169ebdd0f4cb881939f8ae29e6375b42c"
total_cost0.002335
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
79.27% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
010
19
29
39
49