Run: 2026-04-24-01KPZV5219NFWQWAWHBP592M8M

Run Details

Duration:
6.2s
Cost:
$0.009075
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
98.27% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered the cobblestones outside the old Blackwood Manor gates. Detective Harlan Vance stepped carefully across the slick stone path. A single light burned in the third-floor library window. The butler waited silently beneath the dripping wrought iron archway. His face betrayed nothing beyond a practiced, professional cold composure. "She is upstairs, sir," he murmured through pale, trembling lips. Vance nodded once and followed him into the shadowed foyer. Portraits of dead ancestors watched them climb the creaking staircase. Somewhere deep below, a grandfather clock struck midnight with authority. The library door stood ajar, spilling amber light into darkness. Lady Blackwood lay sprawled across her husband's enormous mahogany desk. A silver letter opener protruded from her embroidered silk blouse. Blood had pooled beneath three scattered pages of torn correspondence. Vance crouched low and studied the victim's wide, frozen eyes. "Nobody leaves this house tonight," he said without turning around.
created_at"2026-04-24T13:34:01.782Z" 4/24/2026, 1:34:01 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1058
moderation_latency211
generation_time5924
tokens_prompt46
tokens_completion255
native_tokens_prompt65
native_tokens_completion350
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.009075
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"416ab849-eb7f-4d38-ac9e-523154beb268"
is_byokfalse
latency1056
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-1777037641-TIGvF0x6jxudLZN9PO1H"
session_id(null)
api_type"completions"
id"gen-1777037641-Gpb0kjWqfJJaKsSJIrGj"
upstream_id"416ab849-eb7f-4d38-ac9e-523154beb268"
total_cost0.009075
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
98.27% Matches word count n/a
neededCleanfalse
sentences15
wordCounts
010
110
29
310
410
510
610
710
810
910
1010
1110
1210
1310
1410