Run: 2026-05-31-01KSYXMXS7HBG1TSDHZ2V8AH92

Run Details

Duration:
14.6s
Cost:
$0.024325
Provider:
Anthropic

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
I'll create three alternate continuations for this moment in the story. <nc-section data-title="Chapter 2: A Knight's Welcome" data-color="red"> As I dismounted near the stables, a towering figure emerged from the shadows. Sir Roland, clad in polished armor that caught the dying sunlight, strode toward me with purpose. His weathered face bore the scars of countless battles, yet his eyes held a surprising warmth. "You must be Frederick," he said, his voice deep and commanding. "We've been expecting you. I am Sir Roland, and I shall oversee your training." He extended a gauntleted hand, and as I clasped it, I felt the strength of a man who had earned every ounce of his reputation. "Tend to your horse, lad, then follow me. There is much to discuss before nightfall." </nc-section> <nc-section data-title="Chapter 2: An Unexpected Encounter" data-color="green"> Before I could find a stable hand, a gruff voice called out from behind a pile of hay bales. "Lost, are you?" A man stepped forward, broad-shouldered and grinning, wiping dirt from his hands. Though he wore no armor, the sword at his hip and the confident set of his jaw betrayed his station. "Sir Roland," he introduced himself with a mock bow, "though you'd not guess it, finding me mucking about the stables." He laughed heartily. "A knight must know his horses better than his enemies, young Frederick. Come, let me show you how we do things here. Your training begins not in the great hall, but right here in the muck and the mud." </nc-section> <nc-section data-title="Chapter 2: The Measure of a Squire" data-color="blue"> I had barely tied Thunder to the post when I sensed eyes upon me. Sir Roland stood at the stable entrance, arms crossed, studying me with an intensity that made me straighten my posture. He said nothing at first, merely observed the way I handled my horse, the calluses on my hands, the dust of the long road upon my cloak. "You ride well," he finally remarked, stepping closer. "And you care for your mount before yourself. Good." A faint smile crossed his stern features. "I am Sir Roland. Many squires come to this castle dreaming of glory, but few understand that greatness begins with humility. Perhaps you will be different, Frederick. We shall see. Now, let us begin." </nc-section> Each version offers a distinct tone for Sir Roland—the formal mentor, the unconventional teacher, or the discerning observer. Let me know which direction resonates with your vision for the story!
created_at"2026-05-31T11:45:29.908Z" 5/31/2026, 11:45:29 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2237
moderation_latency(null)
generation_time14528
tokens_prompt318
tokens_completion672
native_tokens_prompt435
native_tokens_completion886
native_tokens_completion_images(null)
native_tokens_reasoning33
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"
usage0.024325
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_0136CXayZuSHTTnSvwt8yUGQ"
is_byokfalse
latency1029
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780227929-soAFNMbqSnhcyAhGgHnU"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780227929-eacn7A6vc9vNzpvJH93Y"
upstream_id"msg_0136CXayZuSHTTnSvwt8yUGQ"
total_cost0.024325
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

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