Run: 2026-07-25-01KYCQPRDPMYWD930J4Q48RXZB

Run Details

Duration:
32.2s
Cost:
$0.076350
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 Thornbury Hall for three days, and the gravel drive shone like wet polished coal. Inspector Wren arrived at seven o'clock, hat brim dripping, and found the front door standing wide open to the storm. Nobody had thought to close it, which told him more about the household than any written statement could possibly convey. In the library, Lord Ashcombe lay face down across his desk, one hand still gripping an expensive black fountain pen. The wound at the back of his skull was small and neat, entirely inconsistent with the fall the butler described. Five guests waited in the drawing room, arranged around a dying fire like reluctant witnesses at their own private trial. Not one of them asked what had happened, and Wren noticed that particular silence more than anything else that evening. Outside, the clocks struck eight, and somewhere above them a floorboard creaked beneath the careful footsteps of a sixth guest.
created_at"2026-07-25T13:33:47.936Z" 7/25/2026, 1:33:47 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4078
moderation_latency(null)
generation_time31899
tokens_prompt46
tokens_completion664
native_tokens_prompt60
native_tokens_completion3042
native_tokens_completion_images(null)
native_tokens_reasoning426
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"
usage0.07635
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNrwCjuaSuELqK2D28Qd"
is_byokfalse
latency1443
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-1784986428-DgtksYjGSIFOELdci2dB"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986428-pZhtJLLvATQdYujphC7t"
upstream_id"msg_011CdNrwCjuaSuELqK2D28Qd"
total_cost0.07635
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
sentences8
wordCounts
020
120
220
320
420
520
620
720