Run: 2026-04-24-01KQ0G090V1R4ZB14D5PMB8Q4V

Run Details

Duration:
14.9s
Cost:
$0.068225
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 against the windows of Ashford Manor for three long hours before anyone noticed the silence. Detective Margaret Hollis stepped carefully across the polished marble floor, her leather boots leaving faint wet prints behind her steps. Candles flickered dimly inside the grand hall where six guests had gathered earlier that evening for a private dinner party. Now only five of them remained alive, huddled together near the fireplace, each trying to avoid every other person's gaze. The body of Lord Ashford lay sprawled across the crimson rug, a silver letter opener buried deep in his chest. Margaret crouched down beside him, examining the wound carefully, noting how the blood had already begun to dry and darken. Someone in this room, she thought grimly, had committed the murder, and nobody would be leaving until she uncovered them.
created_at"2026-04-24T19:38:25.183Z" 4/24/2026, 7:38:25 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2135
moderation_latency(null)
generation_time14854
tokens_prompt46
tokens_completion355
native_tokens_prompt65
native_tokens_completion2716
native_tokens_completion_images(null)
native_tokens_reasoning139
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"
usage0.068225
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"01d69c15-bc04-42c4-a315-a120f29fd787"
is_byokfalse
latency690
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-1777059505-O4la7L5ltdbru2Dqy7S0"
session_id(null)
api_type"completions"
id"gen-1777059505-5v2UnfGZ2uwF7No4Ihyg"
upstream_id"01d69c15-bc04-42c4-a315-a120f29fd787"
total_cost0.068225
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
sentences7
wordCounts
020
120
220
320
420
520
620