Run: 2026-10-08-01M4D9W8M9J8HB499J2BP0V8C0

Run Details

Duration:
8.8s
Cost:
$0.000976
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 not stopped for three days when Inspector Helen Marsh reached Blackwood Manor, its gates hanging wide open. Inside the hall, the butler, Mr. Pryce, stood frozen beside the grand staircase, his hands trembling and his face ashen. Lord Edmund Blackwood lay sprawled across the Persian rug in the library, a silver letter opener protruding from his chest. Marsh knelt beside the body, noting the dried blood, the overturned chair, and the single muddy footprint near the window. Nothing about the scene felt rushed or careless, which unsettled her far more than the corpse itself ever could possibly. Somewhere above them, a door creaked open, and a voice whispered that the killer had not yet left the house.
created_at"2026-10-08T08:25:33.751Z" 10/8/2026, 8:25:33 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2364
moderation_latency(null)
generation_time8551
tokens_prompt46
tokens_completion370
native_tokens_prompt62
native_tokens_completion1940
native_tokens_completion_images(null)
native_tokens_reasoning1685
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"
usage0.0009762
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791447933-wTlPuj2UZq1pgtJ2KvSg"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791447933-cr7BqzTFZg44uLNCLtWL"
upstream_id"msg_011CfpT6bDG4NZDX4VpwtdzH"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpT6bDG4NZDX4VpwtdzH"
is_byokfalse
latency757
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0009762
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
sentences6
wordCounts
020
120
220
320
420
520