Run: 2026-10-09-01M4FY0WWPSMA93X5F4AK24K77

Run Details

Duration:
8.4s
Cost:
$0.000880
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 been falling over Harrowgate for three days when Detective Mara Quill arrived at the manor's iron gates. Inside, the house smelled of wet wool, burnt sugar, and something sharper that she could not yet name, even now. Constable Thomas Greaves met her in the hallway, his face unusually pale and his notebook trembling in his shaking hand. Lord Edmund Ashby had been found at the foot of the grand staircase, a letter opener buried in his chest. Mara knelt beside the body, noting the dried mud on his boots and the candle guttering on the landing above. Nobody had touched the candle, which meant someone had lit it after the killing and then left in a hurry. Mara looked up at the gallery, where eleven guests had gathered, each one watching her with careful, unreadable, hungry eyes.
created_at"2026-10-09T08:56:05.788Z" 10/9/2026, 8:56:05 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2304
moderation_latency(null)
generation_time8335
tokens_prompt46
tokens_completion433
native_tokens_prompt62
native_tokens_completion1748
native_tokens_completion_images(null)
native_tokens_reasoning1476
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"
usage0.0008802
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791536165-s7Crm0zpXjjxb8AeBF5U"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791536165-2VbRizL0kYEOL2eODKle"
upstream_id"msg_011CfrPEYgURTxxN91KPgiU9"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrPEYgURTxxN91KPgiU9"
is_byokfalse
latency747
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0008802
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