Run: 2026-04-24-01KQ0G176HKD9DVFKHB5NSKMTX

Run Details

Duration:
18.5s
Cost:
$0.089100
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 fell heavily on the cobblestone streets of Ravenscroft Manor as Detective Harlow stepped out of his black sedan. A single yellow light flickered weakly in the upstairs window, casting long trembling shadows across the damp and overgrown lawn. He tightened his worn leather coat against the bitter howling wind and noticed the heavy front door standing slightly ajar. Inside the grand marble foyer, a young woman lay motionless beneath the glittering crystal chandelier, her crimson gown perfectly arranged. Detective Harlow knelt beside her, pressing two fingers to her cold pale neck, already certain of what he would discover. From the shadowed staircase high above, someone watched him very carefully, silent and unmoving, clutching a small tarnished silver key.
created_at"2026-04-24T19:38:56.085Z" 4/24/2026, 7:38:56 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2670
moderation_latency(null)
generation_time18389
tokens_prompt46
tokens_completion449
native_tokens_prompt65
native_tokens_completion3551
native_tokens_completion_images(null)
native_tokens_reasoning255
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"
usage0.0891
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"f999fce4-203d-40ef-ab2b-6e43d0438dc1"
is_byokfalse
latency670
model_permaslug"anthropic/claude-4.7-opus-20260416"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777059536-a4s53i96k40DzSI1yIn4"
session_id(null)
api_type"completions"
id"gen-1777059536-JcpklVQ1bLAaKo7bmnSb"
upstream_id"f999fce4-203d-40ef-ab2b-6e43d0438dc1"
total_cost0.0891
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520