Run: 2026-10-09-01M4FZK1RADA9TVVAQTRFDVZAR

Run Details

Model:
Claude Haiku 5.5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
6.5s
Cost:
$0.000587
Provider:
Claude Platform on AWS

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 on Blackwood Manor. Detective Harriet Vane arrived late. Her umbrella dripped onto marble. Constable Reed met her inside. "The body lies upstairs, ma'am." Harriet climbed the creaking staircase. Candles flickered across old portraits. Lord Ashworth lay motionless below. A letter opener protruded sharply. Nobody had heard anything tonight. "Lock every door," Harriet whispered. A clock struck midnight somewhere.
created_at"2026-10-09T09:23:29.168Z" 10/9/2026, 9:23:29 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2285
moderation_latency(null)
generation_time6497
tokens_prompt46
tokens_completion213
native_tokens_prompt62
native_tokens_completion1162
native_tokens_completion_images(null)
native_tokens_reasoning984
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"
usage0.0005872
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791537809-Nyun6pCwYyBaFc0uwUZ5"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791537809-vpDwfelKCGYcAbwyHBZT"
upstream_id"msg_011CfrRKgpzAd7XQgYTjKadM"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrRKgpzAd7XQgYTjKadM"
is_byokfalse
latency696
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0005872
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115