Run: 2026-07-25-01KYCQXZ611935VMD4YF0NT5Z2

Run Details

Duration:
32.3s
Cost:
$0.079950
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 Ashgrove Manor since midnight, and by dawn the gravel drive resembled a shallow river. Inspector Della Hart parked beside the fountain, killed the engine, and watched water spill from a cracked stone lion's mouth. A young constable waited under the portico, holding an umbrella that had already surrendered to the wind an hour earlier. He looked pale, and Della decided the body inside must be worse than the sergeant's careful telephone call had suggested. The library smelled of woodsmoke, spilled brandy, and something metallic that she recognized long before she saw its actual source. Sir Edmund Voss lay face down across the hearthrug, one arm outstretched toward the fireplace and its cold gray ashes. A brass letter opener stood upright between his shoulder blades, driven deep by someone who had very clearly meant it. Six houseguests sat in the drawing room across the hall, each insisting they had heard nothing at all unusual overnight. Della took out her notebook, wrote the time, and understood that at least one of them was almost certainly lying. Outside, the rain kept falling, patiently washing away whatever evidence the killer had been careless enough to leave out there.
created_at"2026-07-25T13:37:44.136Z" 7/25/2026, 1:37:44 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4069
moderation_latency(null)
generation_time32109
tokens_prompt46
tokens_completion721
native_tokens_prompt60
native_tokens_completion3186
native_tokens_completion_images(null)
native_tokens_reasoning416
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"
usage0.07995
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNsEcE1iZQF2nQBNaidY"
is_byokfalse
latency1515
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-1784986664-qD7GgpHjISByUyPMMaE1"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986664-QlQXUlu8C6prEfDVfgzM"
upstream_id"msg_011CdNsEcE1iZQF2nQBNaidY"
total_cost0.07995
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
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920