Run: 2026-10-08-01M4DAHZ1N2E0NXPB01DE960AZ

Run Details

Duration:
10.9s
Cost:
$0.000934
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 over Ashford Manor for three relentless days, and nobody expected what waited in the silent library. Detective Inspector Mara Quill arrived at dawn, her coat soaked through and her notebook already trembling in her cold hand. Lord Edmund Hale had been found slumped beside the fireplace, a sharp letter opener buried deep beneath his left ribs. Every door was locked from the inside, and every guest swore they had been sleeping soundly until the shattering scream. Mara knelt beside the body, noting the muddy footprints leading toward the conservatory and the single missing black leather glove. Somewhere in that sprawling house, someone had lied, and Mara fully intended to find out exactly who had done it.
created_at"2026-10-08T08:37:24.67Z" 10/8/2026, 8:37:24 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3126
moderation_latency(null)
generation_time10877
tokens_prompt46
tokens_completion447
native_tokens_prompt62
native_tokens_completion1855
native_tokens_completion_images(null)
native_tokens_reasoning1614
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"
usage0.0009337
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448644-m98g67TmedIsElXOgZ57"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448644-Q9CoQAyQZM3FWLZXyq2P"
upstream_id"msg_011CfpTzzr1jkQCEeP38KNAk"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTzzr1jkQCEeP38KNAk"
is_byokfalse
latency805
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0009337
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