Run: 2026-07-01-01KWEA1Z9VWEH2MC6XSG2ZGR5A

Run Details

Duration:
31.7s
Cost:
$0.040700
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
Rain fell steadily over the old manor, its windows glowing faintly like tired, watchful eyes staring into the cold darkness. Detective Mara Hale stepped slowly through the old iron gate, her coat collar raised against the biting wind and rain. A single lantern flickered weakly by the entrance, casting long, trembling shadows across the wet and cracked stone steps below. Inside, the housekeeper stood frozen and pale, her hands trembling as she silently pointed toward the study's heavy oak door. Mara pushed it open and found Lord Ashford slumped motionless over his desk, bathed in the flickering candlelight's dim glow. Blood pooled darkly across the scattered papers, staining the edges of an old, unfinished letter beside his cold, still hand. Mara's eyes narrowed as she slowly scanned the room for anything the killer might have carelessly left behind in haste. Outside, the storm intensified even further, as if the dark night itself sought to bury this house's darkest secret forever.
created_at"2026-07-01T07:42:20.486Z" 7/1/2026, 7:42:20 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5559
moderation_latency(null)
generation_time31630
tokens_prompt46
tokens_completion543
native_tokens_prompt60
native_tokens_completion4058
native_tokens_completion_images(null)
native_tokens_reasoning294
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"
usage0.0407
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01Ep1HF3N6EnYbDgMk9bLHC3"
is_byokfalse
latency3855
model_permaslug"anthropic/claude-sonnet-5-20260630"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer(null)
request_id"req-1782891740-TSUSQJBPdwsl608nXoTM"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891740-9aYKkegNh6H6dMVkMMTo"
upstream_id"msg_01Ep1HF3N6EnYbDgMk9bLHC3"
total_cost0.0407
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