Run: 2026-10-08-01M4DA15C53MSAYX79SSGC1M3M

Run Details

Duration:
12.2s
Cost:
$0.001181
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 without pause across the harbor town since Tuesday, and nobody in Westbrook remembered a colder November. Detective Inspector Helen Marsh stood beneath the dripping awning of the Gull and Lantern pub, watching officers unroll yellow tape. Inside, the body of Gerald Ashworth, the town's most generous benefactor, lay slumped forward across his old mahogany writing desk. Nobody had heard a shot, and the only witness, a nervous housekeeper, insisted she had seen nothing whatsoever that night. Marsh crouched beside the victim, noting the half-empty decanter, the scattered letters, and the faint, sweet scent of cloves lingering. Her sergeant, Tom Reilly, hovered at the doorway, clutching a damp notebook he had not yet begun to fill properly. Whoever had killed Gerald Ashworth had known exactly where he kept his secrets, and that frightened her most of all.
created_at"2026-10-08T08:28:14.093Z" 10/8/2026, 8:28:14 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2773
moderation_latency(null)
generation_time12172
tokens_prompt46
tokens_completion509
native_tokens_prompt62
native_tokens_completion2349
native_tokens_completion_images(null)
native_tokens_reasoning2028
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"
usage0.0011807
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448094-AdaQLKQdenBwLDVziPT5"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448094-2iq7IEUSnT4RyPEaxEHI"
upstream_id"msg_011CfpTJQfLrMKH5JYzTqjjB"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTJQfLrMKH5JYzTqjjB"
is_byokfalse
latency714
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0011807
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
sentences7
wordCounts
020
120
220
320
420
520
620