Run: 2026-10-08-01M4DYGPWDHG94KWSY6ZKQMCJN

Run Details

Duration:
7.8s
Cost:
$0.000712
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 fell steadily over Ashford Manor on the night Lord Edmund Vale was found dead in his locked study. Detective Inspector Harriet Cole arrived at the estate just after midnight, her umbrella useless against the howling November wind outside. Nobody in the household would admit to seeing anything unusual, though every single servant seemed to be hiding something important. Harriet noticed a muddy pair of footprints leading from the study window toward the frozen lake behind the old orchard. Whoever had climbed through that window had also left behind a small silver button, engraved with a crescent moon symbol.
created_at"2026-10-08T14:26:15.062Z" 10/8/2026, 2:26:15 PM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2254
moderation_latency(null)
generation_time7783
tokens_prompt46
tokens_completion355
native_tokens_prompt62
native_tokens_completion1412
native_tokens_completion_images(null)
native_tokens_reasoning1216
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"
usage0.0007122
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791469575-64s5Z514ZT0VDQj8dY7i"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791469575-xZwcZyzwEQyqvegUVZ6c"
upstream_id"msg_011CfpvbruH8UGhrrXjqbSYS"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpvbruH8UGhrrXjqbSYS"
is_byokfalse
latency749
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0007122
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