Run: 2026-10-08-01M4D9X6Y8E0VKKNV9ZT1JTS9P

Run Details

Model:
Claude Haiku 5.5 (Adaptive)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
5.9s
Cost:
$0.000659
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. Yellow tape sagged across entrance. Inside, the body lay motionless. Edgar Holt wore silk pajamas. Nobody had heard the gunshot. Mara knelt beside spilled wine. Gloved fingers traced the stain. Behind her, a floorboard creaked. She turned slowly, gun ready. Nobody stood in the doorway. Yet the door stayed locked. Somewhere, a clock ticked on. Someone in this house lied.
created_at"2026-10-08T08:26:04.623Z" 10/8/2026, 8:26:04 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5897
moderation_latency(null)
generation_time5897
tokens_prompt46
tokens_completion113
native_tokens_prompt62
native_tokens_completion1306
native_tokens_completion_images(null)
native_tokens_reasoning1112
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"
usage0.0006592
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791447964-QEIROdPZzGRLrZ09atO6"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791447964-ca7y34snnz4lQHQs5pb3"
upstream_id"msg_011CfpT8rw82jcxEG8XJ59Wf"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpT8rw82jcxEG8XJ59Wf"
is_byokfalse
latency908
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0006592
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
sentences14
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135