Run: 2026-09-03-01M1KA1WCYM43VCQF8QXW5TVVS

Run Details

Duration:
25.8s
Cost:
$0.001420
Provider:
StreamLake

Evaluation summary

Score Evaluator
Details Link
100.00% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The clock in the hall struck eleven as the butler found the body in the library cold and utterly still. The dead woman wore a silver gown, her glass of wine untouched upon the oak desk, still gleaming in lamplight. A single window stood open, yet the rain had not dampened the carpet around her chair or anywhere near it. Inspector Pearce knelt beside the woman and noticed her hands were strangely clean and soft, too clean for a servant. The butler insisted every door was locked, yet he stammered when asked about the missing key still on its hook. On the mantelpiece, a photograph showed the woman laughing with the man who held the key that last winter day.
created_at"2026-09-03T09:36:58.799Z" 9/3/2026, 9:36:58 AM
model"deepseek/deepseek-v4-flash-20260731"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8001
moderation_latency(null)
generation_time25762
tokens_prompt46
tokens_completion3320
native_tokens_prompt118
native_tokens_completion3547
native_tokens_completion_images(null)
native_tokens_reasoning3398
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"
service_tier(null)
usage0.001420188
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer(null)
request_id"req-1788428218-Igeuyf5R1kOhSTAgXCLN"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1788428218-Ezz9MtZrFw3PlUrl8AUm"
upstream_id"req-1hb68q-1788428218975168167"
provider_responses
0
endpoint_id"d880a270-04ff-479c-b312-6246c0f985b0"
id"req-1hb68q-1788428218975168167"
is_byokfalse
latency8001
model_permaslug"deepseek/deepseek-v4-flash-20260731"
provider_name"StreamLake"
status200
total_cost0.001420188
cache_discount(null)
upstream_inference_cost0
provider_name"StreamLake"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520