Run: 2026-10-08-01M4DADZNNQP78X48J8JTWEXD0

Run Details

Model:
Claude Haiku 5.5 (Adaptive)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
7.0s
Cost:
$0.000778
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
The rain fell hard tonight. Detective Mara Voss arrived late. Blood pooled beneath the desk. Victor Elling lay motionless there. His glasses lay shattered nearby. Nobody had heard the gunshot. The housekeeper claimed hearing nothing. Mara knelt, studying the window. It was locked from inside. Whoever did this was careful. Then Mara spotted a cufflink. Engraved with the initials R.H. Someone in this house lied.
created_at"2026-10-08T08:35:14.237Z" 10/8/2026, 8:35:14 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7007
moderation_latency(null)
generation_time7007
tokens_prompt46
tokens_completion107
native_tokens_prompt62
native_tokens_completion1544
native_tokens_completion_images(null)
native_tokens_reasoning1372
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"
usage0.0007782
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448514-gd1TyyTsHfcd1YAOWjXT"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448514-5yo0KSp4oAsLR9BJo7KW"
upstream_id"msg_011CfpTqNgQ3jpsRXLnhXRZ3"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTqNgQ3jpsRXLnhXRZ3"
is_byokfalse
latency675
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0007782
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
sentences13
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125