Run: 2026-04-25-01KQ2FAASQDTQPEDM7NJFTQ1V1

Run Details

Duration:
4.7s
Cost:
$0.000154
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
87.04% 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
The rain tapped softly against the cold, foggy window pane. Detective Harris stared down at the body on the marble floor. The victim’s lifeless eyes reflected the dim chandelier’s fading light. A single crimson rose rested perfectly upon her still chest. No signs of struggle marked the room’s otherwise pristine arrangement. He knelt closer, noticing a faint smudge of gray ash. It trailed toward the locked balcony doors behind heavy velvet drapes. A half-empty champagne flute sat sweating on the antique side table. Someone had shared a final, silent toast with the deceased. He peeled off his wet gloves and reached for his notebook. The clock on the mantle struck midnight with a hollow chime. Time of death was a puzzle hidden in plain opulent sight.
created_at"2026-04-25T14:04:54.97Z" 4/25/2026, 2:04:54 PM
model"deepseek/deepseek-v4-pro-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency952
moderation_latency(null)
generation_time4628
tokens_prompt46
tokens_completion200
native_tokens_prompt39
native_tokens_completion157
native_tokens_completion_images(null)
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"stop"
usage0.000153555
router(null)
provider_responses
0
endpoint_id"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id"bfae7329-bfff-40fa-bd7f-7afb54ccb3a0"
is_byokfalse
latency280
model_permaslug"deepseek/deepseek-v4-pro-20260423"
provider_name"DeepSeek"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777125894-YwT85yYAUjLRQFW7OQUq"
session_id(null)
api_type"completions"
id"gen-1777125894-E6XfARfxv0UDKr6YKPIN"
upstream_id"bfae7329-bfff-40fa-bd7f-7afb54ccb3a0"
total_cost0.000153555
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
87.04% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
010
111
210
310
410
510
611
711
810
911
1011
1111