Run: 2026-10-08-01M4DAM0RGENHQDST6XQAP4HRE

Run Details

Duration:
8.2s
Cost:
$0.001013
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 on Blackmoor Hall for three days, washing gravel paths grey and turning gardens into sodden mud. Inspector Elena Marsh arrived at dawn, her coat buttoned tight against a cold wind that smelled of woodsmoke and fear. The body of Lord Alistair Crane lay face down in the library, one hand still gripping a brass letter opener. Nobody in the household admitted to hearing a single shot, though every guest claimed to have been awake all night. Marsh knelt beside the victim, noting the tilted chair, the untouched brandy, and the smear of ink on his cuff. Something about the scene felt staged, as though someone had wanted the room to tell a story that never happened. Her partner, Sergeant Tom Briggs, was already interviewing the housekeeper in the cramped kitchen at the rear of the house. Briggs looked up as she entered, and his expression told her he had already found something they would both regret.
created_at"2026-10-08T08:38:31.958Z" 10/8/2026, 8:38:31 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8223
moderation_latency(null)
generation_time8223
tokens_prompt46
tokens_completion232
native_tokens_prompt62
native_tokens_completion2013
native_tokens_completion_images(null)
native_tokens_reasoning1699
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"
usage0.0010127
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448711-r41JntvaUGbW0MyHNDMs"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448711-eF42gWPyKbCiEgFDvTdv"
upstream_id"msg_011CfpU5wtK2KoHhJa8EDyuv"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpU5wtK2KoHhJa8EDyuv"
is_byokfalse
latency684
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0010127
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
sentences8
wordCounts
020
120
220
320
420
520
620
720