Run: 2026-03-18-01KM08HYM0ED4WAGKXEBND94FK

Run Details

Duration:
1.2s
Cost:
$0.000194
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
92.22% 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
Detective Mara Voss arrived at Larkspur Manor before sunrise. A silence hung among gardens, yet alarms had already sounded. Wealthy patrons gathered, whispering, while servants avoided direct eye contact. The victim, Sir Edwin Harrow, lay motionless beside fountains. I noted a perfume trail, interrupted abruptly near his pocket watch. Rain began softly, masking footprints that circled the locked pavilion. Mara examined his hands, finding sand and dark wax residue. From within, a violin melody played without any visible musician. The housekeeper trembled, insisting someone entered through the portrait gallery. Mara requested names, while the butler produced a trembling alibi.
created_at"2026-03-18T10:41:10.287Z" 3/18/2026, 10:41:10 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency472
moderation_latency(null)
generation_time1110
tokens_prompt46
tokens_completion182
native_tokens_prompt41
native_tokens_completion149
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)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.00019445
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0b51452696d126bd0169ba814656c08193b2a86b93563dbbde"
is_byokfalse
latency201
model_permaslug"openai/gpt-5.4-nano-20260317"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773830470-gRCmYjS75FdJMCbiQlQ5"
upstream_id"resp_0b51452696d126bd0169ba814656c08193b2a86b93563dbbde"
total_cost0.00019445
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
92.22% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
09
110
210
39
411
510
610
710
810
910