Run: 2026-10-09-01M4FYFN4QZY1JEM2H62711ANS

Run Details

Model:
Claude Haiku 5.5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
11.3s
Cost:
$0.000871
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 lashed against the windows. Inspector Halloway arrived at midnight. Lord Ashcombe lay dead nearby. Blade jutted from his back. Nobody admitted hearing anything strange. Seven suspects waited in silence. Each carried a dangerous secret. Clara wept quietly, clutching pearls. Her husband watched me coldly. Halloway knelt beside the body. His glasses lay shattered nearby. Someone had drugged his brandy. Halloway lifted the decanter carefully. Three glasses stood untouched nearby. Only one bore fresh fingerprints. Halloway smiled grimly at last. The game had truly begun.
created_at"2026-10-09T09:04:09.373Z" 10/9/2026, 9:04:09 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2994
moderation_latency(null)
generation_time11274
tokens_prompt46
tokens_completion415
native_tokens_prompt62
native_tokens_completion1730
native_tokens_completion_images(null)
native_tokens_reasoning1491
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"
usage0.0008712
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791536649-nsWCqKcifFSh9j6BwTj5"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791536649-jhpY18j9uDdBOL0mSt1M"
upstream_id"msg_011CfrPrC9x6nyBepKnWnrLX"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrPrC9x6nyBepKnWnrLX"
is_byokfalse
latency781
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0008712
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
sentences17
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165