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Run: 2026-07-01-01KWE8TYKAKJBEJ4GYBH2G1D4M
Run Details
Model:
Claude Sonnet 5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
31.4s
Cost:
$0.040840
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
Messages
Meta
AI
Rain hammered relentlessly against the old manor's tall windows as Detective Sarah Chen finally stepped through the creaking front door. The lifeless body lay motionless upon the polished mahogany floor, surrounded completely by shattered glass, blood, and utter eerie silence. Detective Chen knelt slowly beside the victim, carefully noting the very pale, cold skin under the faintly dim flickering candlelight. No weapon was visible anywhere, yet the entire scene reeked of something far more sinister than a simple robbery tonight. Chen glanced toward the open window, where torn curtains still fluttered wildly in the raging cold storm's relentless wind outside. Somewhere within this darkened old house tonight, a killer was patiently watching, waiting for the raging storm to finally pass.
created_at
"2026-07-01T07:21:01.814Z"
7/1/2026, 7:21:01 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4583
moderation_latency
(null)
generation_time
30336
tokens_prompt
46
tokens_completion
590
native_tokens_prompt
60
native_tokens_completion
4072
native_tokens_completion_images
(null)
native_tokens_reasoning
391
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
0.04084
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01V6R9YEvkTBsqm4byMWj8Sm"
is_byok
false
latency
1787
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-1782890462-gdPMwvP3JlNlv0XdJrPy"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782890462-wELuavPKt8VnJq0KqsuG"
upstream_id
"msg_01V6R9YEvkTBsqm4byMWj8Sm"
total_cost
0.04084
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
100.00%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20