Run: 2026-10-08-01M4DAEZ3G4HDHBKB7KN6CWK4A

Run Details

Model:
Claude Haiku 5.5 (Adaptive)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.8s
Cost:
$0.000834
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered against the tall windows of Blackwood Manor relentlessly. Inspector Eleanor Vance arrived just after midnight, soaked and irritable. The body of Lord Harold Pemberton lay beneath the staircase. His face was pale, his eyes fixed on the ceiling. A broken champagne flute lay near his outstretched right hand. Detective Marcus Holt crouched beside him, studying the scattered glass. Nobody in the household admitted seeing the victim after dinner. Every guest carried a secret, and each one lied convincingly. Eleanor knelt slowly, noticing a crimson smear on the carpet. Someone had moved the body, and that someone was clever.
created_at"2026-10-08T08:35:46.425Z" 10/8/2026, 8:35:46 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency6740
moderation_latency(null)
generation_time6740
tokens_prompt46
tokens_completion160
native_tokens_prompt62
native_tokens_completion1656
native_tokens_completion_images(null)
native_tokens_reasoning1423
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"
usage0.0008342
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448546-nE2yjZAuFQTqxQQytFxY"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448546-ht02yRGkgIunHS9cewnm"
upstream_id"msg_011CfpTsm6aiFHJjyUaRuWDK"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTsm6aiFHJjyUaRuWDK"
is_byokfalse
latency820
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0008342
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
sentences10
wordCounts
010
110
210
310
410
510
610
710
810
910