NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-07-01-01KWE9F32YKHRZ0TY9YGTVYKBR
Run Details
Model:
Claude Sonnet 5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
14.9s
Cost:
$0.019160
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain fell hard against the old manor's grimy windows tonight. Detective Mara Hale stepped quietly inside, shaking off the cold. The old butler waited nervously near the grand marble staircase. Somewhere upstairs, a woman screamed once, then fell completely silent. Mara's hand instinctively reached for the pistol at her hip. The butler flinched slightly, gesturing toward the darkened east wing. Mara climbed the stairs slowly, each step creaking beneath her. At the top, she found a heavy door slightly open. Inside lay a woman, motionless upon the crimson-stained wool rug. Mara knelt beside her, already certain this meant murder tonight.
created_at
"2026-07-01T07:32:01.771Z"
7/1/2026, 7:32:01 AM
model
"anthropic/claude-sonnet-5-20260630"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3592
moderation_latency
(null)
generation_time
14914
tokens_prompt
46
tokens_completion
263
native_tokens_prompt
60
native_tokens_completion
1904
native_tokens_completion_images
(null)
native_tokens_reasoning
102
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
0.01916
router
(null)
provider_responses
0
endpoint_id
"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id
"msg_01QBSZV8ERSWYCMGcgGE2DTG"
is_byok
false
latency
1552
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-1782891121-tfWGtEA40tXNuof1ulzx"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1782891121-mbpYsKOcPid10IE63eO8"
upstream_id
"msg_01QBSZV8ERSWYCMGcgGE2DTG"
total_cost
0.01916
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
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10