Run: 2026-10-09-01M4G0RH43Q1Y6V4AFH532XQGS

Run Details

Duration:
8.8s
Cost:
$0.000710
Provider:
Claude Platform on AWS

Evaluation summary

Model input

System
You are an expert fantasy novel author. You are working on a novel called "The Chronicles of the Last Dragon". The following tools are available to you: - <nc-section> Use this tool to create a new section of prose. Arguments: - "data-title": The title of the section. - "data-color": Any color of (red, green, blue, yellow, purple, orange, pink, brown). Example usage: <nc-section data-title="Chapter 1: The Arrival" data-color="blue"> Frederick, a young squire, arrives at the castle to begin his training. </nc-section>
User/Human
The story so far: <storySoFar> Frederick, a young squire, arrives at the castle to begin his training. </storySoFar>
AI
My horse, a majestic stallion named Thunder, galloped across the open field. The wind whipped through my hair as I rode towards the castle gates. The sun was setting, casting a warm glow over the stone walls. I could see the banners of the kingdom fluttering in the breeze.
User/Human
Continue the story with the following instructions: """The local knight, Sir Roland, greets Frederick near the stables.""" Create 3 alternate prose sections that continue the story. - Version 1 (red) - Version 2 (green) - Version 3 (blue)

Model response

AI
<nc-section data-title="Chapter 1: Sir Roland's Welcome (Version 1)" data-color="red"> The stable yard was loud with hooves and hammering when I reined Thunder to a halt. A broad-shouldered man in dented chainmail strode toward me, his grey beard trimmed close and his eyes sharp beneath a battered helm he had pushed back on his head. "You must be the new squire," he said, gripping the bridle before I could dismount. "Frederick, is it? I am Sir Roland. I have trained every squire in this castle for twenty years, and I have buried two of them, so do not expect me to be gentle." He ran a practiced hand along Thunder's neck, and the stallion, who had been skittish all the way from the road, calmed at once. "Good animal," Sir Roland said. "Better than you deserve, I suspect. We will see whether you deserve him by the end of the month." I swallowed my reply and slid from the saddle, my legs stiff from the long ride. Sir Roland was already turning toward the training yard, expecting me to follow. </nc-section> <nc-section data-title="Chapter 1: Sir Roland's Welcome (Version 2)" data-color="green"> A stable boy hurried out to take Thunder's reins, but before I could hand them over, a voice rang out from the doorway of the stables. "Easy, lad, he'll not bite unless you deserve it." Sir Roland stepped into the evening light, wiping his hands on a rag. He was older than I had imagined from the stories my mother told, his hair more silver than brown, but he moved with the unhurried confidence of a man who had never once doubted his own strength. A faded green cloak hung from his shoulders, its embroidered crest worn almost smooth. "Frederick of Ashford," he said, studying me closely. "Your letter said you were eager. I hope it was not exaggerated." "I am eager, Sir Roland," I answered, and was relieved when my voice did not crack. He smiled, a quick, crooked expression. "Good. Eagerness is cheap. What I need is stubbornness. Come, leave your saddlebags with the boy. I want to see how you walk when you think no one is watching." With that, he turned and led me across the cobbles toward the castle, leaving the stable boy to lead Thunder away. </nc-section> <nc-section data-title="Chapter 1: Sir Roland's Welcome (Version 3)" data-color="blue"> As I dismounted beside the stables, the scent of hay and leather wrapped around me like a welcome. A horse whinnied somewhere within, and a moment later a tall knight emerged from the shadows of the doorway, a wooden practice sword resting on his shoulder. "You are Frederick," he said. It was not a question. "I am Sir Roland, and for the next four years you will belong to me, whether you like it or not." His voice was gruff but not unkind. Up close, I saw the scars on his knuckles and the patience in his grey eyes, the look of someone who had watched many boys arrive full of dreams and had learned to measure them carefully. "Your horse is fine," he added, glancing at Thunder. "Your posture, however, needs work. Stand up straighter. A squire who slouches on arrival will be a knight who slouches in battle." I straightened immediately, and he nodded once, satisfied. "Good. Leave your things here. The steward will see to them. Tonight you eat, tomorrow you train, and the day after you will wish you had stayed at home." He tossed me the practice sword, and I caught it awkwardly, feeling the weight of my new life settle onto my shoulders. </nc-section>
created_at"2026-10-09T09:43:57.322Z" 10/9/2026, 9:43:57 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2495
moderation_latency(null)
generation_time8769
tokens_prompt303
tokens_completion949
native_tokens_prompt437
native_tokens_completion1333
native_tokens_completion_images(null)
native_tokens_reasoning108
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"
usage0.0007102
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791539037-ECBcYTZuOz4z5rzTA4xO"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791539037-BDPSUi1uGk0XvIwMdfxU"
upstream_id"msg_011CfrStDuH8cziG1kZ7Xzaw"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfrStDuH8cziG1kZ7Xzaw"
is_byokfalse
latency789
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0007102
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
Pass Match blue prose section
/<nc-section data-title="[^"]*" data-color="blue">[^<]+<\/nc-section>/
n/a
Pass Match green prose section
/<nc-section data-title="[^"]*" data-color="green">[^<]+<\/nc-section>/
n/a
Pass Match red prose section
/<nc-section data-title="[^"]*" data-color="red">[^<]+<\/nc-section>/
n/a
no eval