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Run: 2026-04-24-01KPZV8X974708Y1Z9XMX97YVK
Run Details
Model:
Claude Opus 4.7
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
5.6s
Cost:
$0.009250
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
69.52%
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
Messages
Meta
AI
The rain hammered against the windows of Blackwood Manor as Inspector Harrow stepped carefully across the polished marble entrance hall. Candles flickered in iron sconces, casting restless shadows that seemed to dance along the walls like uneasy spirits. Lady Ashcombe lay motionless upon the crimson carpet, her pale fingers still clutching a torn fragment of yellowed parchment. Seven guests stood frozen in the drawing room doorway, their faces revealing shock, suspicion, and something darker beneath the surface. A single crystal goblet rested beside the body, its contents spilled across the floor in a dark, spreading stain. Harrow knelt slowly, studying the peculiar bruise encircling her wrist and the faint scent of bitter almonds lingering nearby. Thunder cracked overhead, rattling the ancient chandeliers and sending a tremor through the gathered witnesses who dared not speak a word. "Nobody leaves this house tonight," he announced quietly, his voice carrying the weight of every secret buried within these walls.
created_at
"2026-04-24T13:36:07.989Z"
4/24/2026, 1:36:07 PM
model
"anthropic/claude-4.7-opus-20260416"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1223
moderation_latency
(null)
generation_time
5493
tokens_prompt
46
tokens_completion
257
native_tokens_prompt
65
native_tokens_completion
357
native_tokens_completion_images
(null)
native_tokens_reasoning
0
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"end_turn"
usage
0.00925
router
(null)
provider_responses
0
endpoint_id
"0fa65117-00d9-4835-808d-9b68041d9ce4"
id
"32e0af3d-09b8-4d8c-9605-5e82ad89ced3"
is_byok
false
latency
1223
model_permaslug
"anthropic/claude-4.7-opus-20260416"
provider_name
"Amazon Bedrock"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer
(null)
request_id
"req-1777037767-96HkTlNzVZAnAeNr5KzL"
session_id
(null)
api_type
"completions"
id
"gen-1777037767-LqZDejzD9U4ceXqvbtOe"
upstream_id
"32e0af3d-09b8-4d8c-9605-5e82ad89ced3"
total_cost
0.00925
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
69.52%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
20
1
18
2
19
3
20
4
19
5
19
6
21
7
20