Run: 2026-07-25-01KYCQYV9RN812VSQFGPR04RPK

Run Details

Duration:
36.8s
Cost:
$0.088525
Provider:
Amazon Bedrock

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 been falling on Ashcombe Manor since midnight, and by dawn the gravel drive resembled a shallow river. Inspector Nell Ravensworth arrived at seven, her thin coat soaked through completely, carrying nothing but a notebook and considerable suspicion. The butler met her beneath the portico, his face the colour of the grey ash in yesterday's cold, unswept grate. He said the library door was locked from inside, and Sir Edmund Wren had not answered any of their knocking. Nell followed him through corridors smelling of beeswax and old money, past ancestors who watched her pass with painted disapproval. Three sleepless guests waited in the hall, arranged like witnesses at a private trial that had not yet formally begun. Nobody offered a greeting, which told her more about the household than an entire hour of careful, polite questioning would. The library door yielded on the third shoulder, splintering at the lock and swinging slowly inward against a waiting silence. Sir Edmund sat at his desk with a letter opener between his ribs and a faint expression of mild surprise. The windows were latched, the chimney was blocked, and the only key lay inside the dead man's own waistcoat pocket. Nell crouched beside the body, studying the wound, and noticed the ink still wet on his stiff left shirt cuff. Somebody inside this locked house had written something, and someone else had made certain that nobody would ever read it.
created_at"2026-07-25T13:38:12.932Z" 7/25/2026, 1:38:12 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4340
moderation_latency148
generation_time36373
tokens_prompt46
tokens_completion771
native_tokens_prompt60
native_tokens_completion3529
native_tokens_completion_images(null)
native_tokens_reasoning410
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"
usage0.088525
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNsGkRRvvLvPXiaG9EWB"
is_byokfalse
latency1538
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-1784986692-kz14SuIFZsqBodmpxPXm"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986692-9SDZnyTqBF1Wj9XDmCYG"
upstream_id"msg_011CdNsGkRRvvLvPXiaG9EWB"
total_cost0.088525
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
100.00% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
020
120
220
320
420
520
620
720
820
920
1020
1120