Run: 2026-04-24-01KPZTZQ2DDS6SG1YZQZ6A7J34

Run Details

Duration:
5.8s
Cost:
$0.009900
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
77.28% 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 hammered against the windows of Ravenscroft Manor as Detective Eleanor Hayes stepped carefully across the marble foyer floor. A single candelabra flickered beside the grand staircase, casting long shadows that danced like ghosts upon the walls. The body lay facedown near the fireplace, one pale hand outstretched toward something that was no longer sitting there. Lord Ashworth had been dead for precisely three hours, according to the coroner who stood grimly beside his medical bag. Seven guests remained trapped inside the manor, each wearing expressions of carefully rehearsed shock that Eleanor immediately found deeply suspicious. The storm outside had severed every telephone line, every road, every possible connection between this house and the distant village beyond. Eleanor knelt beside the victim, noting the crystal decanter shattered across the rug and the strange symbol drawn in ash. "Nobody leaves this room," she announced quietly, her voice cutting through the tense silence like a blade through silk. One guest gasped audibly, another reached instinctively toward his jacket pocket, and somewhere upstairs a door slammed shut with finality.
created_at"2026-04-24T13:31:06.713Z" 4/24/2026, 1:31:06 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1142
moderation_latency(null)
generation_time5682
tokens_prompt46
tokens_completion293
native_tokens_prompt65
native_tokens_completion383
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"
usage0.0099
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"5454d6e0-f042-49b3-b8cc-09f6f611d33e"
is_byokfalse
latency1142
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-1777037466-pDYDFJtMrdC3d85rq1KQ"
session_id(null)
api_type"completions"
id"gen-1777037466-s3KDfy2DykhPtrRKytdy"
upstream_id"5454d6e0-f042-49b3-b8cc-09f6f611d33e"
total_cost0.0099
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
77.28% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
020
118
219
320
420
521
620
719
820