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Run: 2026-07-01-01KWE8V0KRGDDF2C1FG4BTC060
Run Details
Model:
Claude Sonnet 5
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
7.1s
Cost:
$0.003610
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
30.34%
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
Messages
Meta
AI
# The Opening Scene Rain fell hard against the old manor's tall windows. Detective Sarah Cole stepped carefully through the creaking door. The butler waited nervously beside the grand staircase. "Something terrible happened here," he whispered with fear. Cole nodded slowly, removing her damp leather gloves. The study smelled faintly of gunpowder and roses. Lord Ashford lay motionless behind his mahogany desk. Blood pooled slowly across the antique Persian rug. Cole scanned the room for any missing clues. A single chess piece rested near his hand. The king had fallen, toppled from its square. Someone had planned this murder with great care. Three guests remained trapped inside the old house. Each one carried secrets worth killing for. Cole straightened her coat and studied their faces. "One of you," she said, "is lying tonight." Thunder cracked outside, rattling the ancient windowpanes. The killer stood among them, calm and silent. Cole's eyes narrowed as she began her work. The night had only just begun to unfold.
created_at
"2026-07-01T07:21:03.877Z"
7/1/2026, 7:21:03 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1450
moderation_latency
132
generation_time
6882
tokens_prompt
46
tokens_completion
259
native_tokens_prompt
60
native_tokens_completion
349
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"
service_tier
"default"
usage
0.00361
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01MfbuPoBbw7MJCvBUXtnCZm"
is_byok
false
latency
1450
model_permaslug
"anthropic/claude-sonnet-5-20260630"
provider_name
"Amazon Bedrock"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer
(null)
request_id
"req-1782890463-7sV4zkV97GZSI3YV57fh"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782890463-ze7kA41VGRTtJofZTTkA"
upstream_id
"msg_01MfbuPoBbw7MJCvBUXtnCZm"
total_cost
0.00361
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
response_cache_source_id
(null)
data_region
"global"
Evaluation details
Result
Evaluator
Details
Meta Data
30.34%
Matches word count
n/a
neededClean
false
sentences
20
wordCounts
0
4
1
9
2
9
3
8
4
8
5
8
6
8
7
8
8
8
9
8
10
8
11
8
12
8
13
8
14
7
15
8
16
15
17
8
18
8
19
8