Run: 2026-07-01-01KWE8QQVPJY9VHWQS5CVYM91V

Run Details

Model:
Claude Sonnet 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
12.7s
Cost:
$0.013610
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain fell hard on Elmwood. Detective Hale stepped inside slowly. The body lay near fireplace. Blood pooled dark on wood. No one heard the shot. Windows were locked from inside. The butler avoided his gaze. Something felt wrong that night. Hale knelt beside the corpse. A note lay under him. It read: "Forgive me, Claire." Claire had vanished without trace. Hale's eyes narrowed with suspicion. The case had just begun.
created_at"2026-07-01T07:19:16.607Z" 7/1/2026, 7:19:16 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3717
moderation_latency(null)
generation_time12719
tokens_prompt46
tokens_completion229
native_tokens_prompt60
native_tokens_completion1349
native_tokens_completion_images(null)
native_tokens_reasoning101
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"
service_tier"default"
usage0.01361
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_0113DG4rUEBHiBsdoZpoVd4S"
is_byokfalse
latency1639
model_permaslug"anthropic/claude-sonnet-5-20260630"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer(null)
request_id"req-1782890356-NG7uUgdrsSXrG3mN9qDm"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890356-34GCrxMzhlTg5F2jJTZ9"
upstream_id"msg_0113DG4rUEBHiBsdoZpoVd4S"
total_cost0.01361
cache_discount(null)
upstream_inference_cost0
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
neededCleanfalse
sentences14
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135