Run: 2026-10-09-01M4G0Y6KKWPV73QN52EN4K1BH

Run Details

Duration:
6.8s
Cost:
$0.000625
Provider:
Claude Platform on AWS

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 rain had fallen over Ashford Manor since dawn, washing gravel paths grey and filling every gutter with cold water. Inside the drawing room, Lord Edmund Vale lay motionless beside the cold fireplace, one hand still clutching a crystal tumbler. Detective Inspector Margaret Holloway stood in the doorway, her umbrella dripping onto the rug, and studied the scene very carefully. Nothing about the room seemed out of place, yet something about it felt terribly wrong to her trained, experienced eye. Holloway knelt beside the body, noticing the faint smell of bitter almonds and the wet footprints leading toward the study.
created_at"2026-10-09T09:47:03.161Z" 10/9/2026, 9:47:03 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2430
moderation_latency(null)
generation_time6832
tokens_prompt46
tokens_completion315
native_tokens_prompt62
native_tokens_completion1238
native_tokens_completion_images(null)
native_tokens_reasoning1018
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"end_turn"
service_tier"default"
usage0.0006252
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791539223-VZPDlWxSfZhhj2fy66bZ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791539223-5IkuKEZaTk17C0CFQIy5"
upstream_id"msg_011CfrT7vJkRESVb1LKLiS3P"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrT7vJkRESVb1LKLiS3P"
is_byokfalse
latency735
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0006252
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
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
sentences5
wordCounts
020
120
220
320
420