Run: 2026-10-09-01M4G1M4Y8W8SJPQNGWEQDQDDW

Run Details

Model:
Claude Haiku 5.5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
8.3s
Cost:
$0.000700
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 Harlow arrived at dawn. Victim lay beside the hearth. Her throat bore thin bruises. Nobody had touched the teacup. Lord Ashcombe lingered in doorway. His hands trembled, eyes steady. Harlow knelt, studying the cup. Lipstick stained the porcelain rim. Someone poisoned more than tea. Every guest became a suspect.
created_at"2026-10-09T09:59:02.351Z" 10/9/2026, 9:59:02 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2578
moderation_latency(null)
generation_time8270
tokens_prompt46
tokens_completion234
native_tokens_prompt62
native_tokens_completion1388
native_tokens_completion_images(null)
native_tokens_reasoning1229
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"
usage0.0007002
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791539942-IvyOtzxrQ5iPc6n4bIEe"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791539942-78cUoZN2QSOhAYMX4jDz"
upstream_id"msg_011CfrU2w6Mpm9rVE8wRHcWx"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrU2w6Mpm9rVE8wRHcWx"
is_byokfalse
latency742
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0007002
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
sentences11
wordCounts
05
15
25
35
45
55
65
75
85
95
105