Run: 2026-07-01-01KWE95S6V469CYEPS3RA8BBBJ

Run Details

Model:
Claude Sonnet 5 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
9.5s
Cost:
$0.009660
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. The old house stood silent. Detective Hayes stepped through mud. A woman screamed from inside. He drew his gun quickly. The door creaked open slowly. Blood pooled beneath the table. A body lay near it. Hayes knelt down beside her. Her eyes stared into nothing. Something glinted beneath her hand. A silver knife, still warm. Hayes exhaled and stood up. This was no simple suicide. Somewhere outside, thunder cracked loudly. The killer was still nearby.
created_at"2026-07-01T07:26:56.745Z" 7/1/2026, 7:26:56 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4676
moderation_latency(null)
generation_time9397
tokens_prompt46
tokens_completion243
native_tokens_prompt60
native_tokens_completion954
native_tokens_completion_images(null)
native_tokens_reasoning97
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"
usage0.00966
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01Wq9kSHi8EXY7JJ8DGFnWX9"
is_byokfalse
latency1686
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-1782890816-wSI6I3K1ZLyFwhCczaSZ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782890816-ao3Y1O4MnFtnsgM6Ijbr"
upstream_id"msg_01Wq9kSHi8EXY7JJ8DGFnWX9"
total_cost0.00966
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
sentences16
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155