Run: 2026-10-08-01M4DA1E5GCSGYDJ7RTD533Z8F

Run Details

Model:
Claude Haiku 5.5 (Adaptive)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
7.3s
Cost:
$0.000846
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 hammered the manor windows. Detective Clara Vance arrived late. Victim lay beneath the staircase. Nobody had touched anything yet. Ashford's cane lay broken nearby. Muddy prints crossed the marble. Clara knelt, studying the wound. Blood pooled beneath his head. Whoever did this was careful. Or someone wanted it staged. Her phone buzzed twice, urgently. Another death had been reported.
created_at"2026-10-08T08:28:23.099Z" 10/8/2026, 8:28:23 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7288
moderation_latency(null)
generation_time7288
tokens_prompt46
tokens_completion102
native_tokens_prompt62
native_tokens_completion1680
native_tokens_completion_images(null)
native_tokens_reasoning1519
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"
usage0.0008462
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448103-n1SS0I0PHQAvkpWa6Igv"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448103-VWpcFcm1cfeapXVF8VRw"
upstream_id"msg_011CfpTK4uEP8TcqN8TbS2Xp"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTK4uEP8TcqN8TbS2Xp"
is_byokfalse
latency696
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0008462
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