Run: 2026-07-25-01KYCPP79G0SDE5WCPGK6QZR68

Run Details

Duration:
9.1s
Cost:
$0.009750
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
68.52% 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 on Ashgrove Manor for three days, turning the gravel drive into a river of mud. Inspector Nora Kell stepped from her car and counted seven lit windows, though the household should have been asleep. She had received the telephone call at four in the morning, a woman's voice, breathless, refusing to give names. The front door stood open, swinging gently, and rainwater had already darkened the Persian runner just inside the threshold. In the library, beneath a portrait of a man holding a spaniel, lay Sir Edmund Ashgrove, quite thoroughly dead. His right hand still gripped a fountain pen; his left had torn a page from the ledger on the desk. Nora crouched beside him, noting the absence of blood, the odd blue tinge along the lips and fingernail beds. Behind her, someone cleared their throat, and she turned to find four people watching her from the darkened hallway. None of them wore nightclothes, which struck her as the single most interesting fact she had learned that morning. "Which one of you telephoned?" she asked, and the silence that answered lasted precisely eleven seconds by her watch.
created_at"2026-07-25T13:16:01.717Z" 7/25/2026, 1:16:01 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1736
moderation_latency(null)
generation_time9020
tokens_prompt46
tokens_completion290
native_tokens_prompt60
native_tokens_completion378
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.00975
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqabqGs39knRnSS8iwG"
is_byokfalse
latency1736
model_permaslug"anthropic/claude-opus-5-20260723"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784985361-a6gsthdll30IcdF1CAxX"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985361-yPrAOHGZ1keP30yZtKsj"
upstream_id"msg_011CdNqabqGs39knRnSS8iwG"
total_cost0.00975
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
68.52% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
119
219
319
419
520
619
719
819
919