Model

Claude Opus 4.5

Test

Tool usage within Novelcrafter

Scenario

Create alternate prose sections

Run ID

2026-02-08-01KGYWZMPVH99R97TGC3EJJBCF

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="Version 1" data-color="red"> As I dismounted near the stables, a towering figure emerged from the shadows. Sir Roland stood before me, his armor gleaming despite the fading light. His weathered face bore the scars of countless battles, yet his eyes held an unexpected warmth. "So you're the new squire," he said, his voice deep as rolling thunder. He clasped my shoulder with a gauntleted hand. "Frederick, is it? I've heard tales of your father's bravery. Let us see if the apple falls far from the tree." A stable boy rushed forward to take Thunder's reins, and Sir Roland gestured toward the castle. "Come. You'll want to rest before your training begins at dawn." </nc-section> <nc-section data-title="Version 2" data-color="green"> The stable doors creaked open, and a knight strode out, wiping his hands on a worn cloth. Sir Roland was not what I had expected—no polished armor or flowing cape. Instead, he wore simple riding leathers, and bits of hay clung to his graying beard. "You must be Frederick," he said, studying me with keen blue eyes. "You're late. I expected you before midday." "The roads were—" I began. "Excuses are for the weak," he interrupted, though a slight smile tugged at his lips. "But you made it. That's what matters. Can you muck a stall?" I blinked. "I... yes, Sir Roland." "Good. Your first lesson begins now. A knight who cannot care for his horse is no knight at all." </nc-section> <nc-section data-title="Version 3" data-color="blue"> I had barely led Thunder into the stable yard when the clash of steel rang out behind me. I spun around to find a blade pointed at my chest, held by a knight with silver-streaked hair and a dangerous grin. "Dead," Sir Roland declared. "If I were an enemy, your head would be rolling in the hay." My heart hammered against my ribs. "Sir Roland, I—" He sheathed his sword in one fluid motion and laughed—a booming sound that echoed off the stable walls. "Relax, boy. I merely wanted to see your reflexes." He circled me slowly, assessing. "Not bad. You didn't flee or freeze completely. There may be hope for you yet, young Frederick." He clapped me on the back hard enough to make me stumble. "Welcome to Thornhaven Castle." </nc-section>
created_at"2026-02-08T15:12:50.170901+00:00" Sunday, February 8th, 2026 at 3:12:50 PM GMT+00:00
model"anthropic/claude-4.5-opus-20251124" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1600
moderation_latency314
generation_time12790
tokens_prompt282
tokens_completion539
native_tokens_prompt335
native_tokens_completion604
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/" 
is_byokfalse
finish_reason"stop" 
native_finish_reason"stop" 
usage0.016775
router(null)
provider_responses
0
id"00052738-5a5e-4ede-86ed-53986af63dd4" 
status200
is_byokfalse
latency1599
endpoint_id"de32581c-2e11-4f54-8d29-e8a6e19d3038" 
provider_name"Amazon Bedrock" 
model_permaslug"anthropic/claude-4.5-opus-20251124" 
api_type"completions" 
id"gen-1770563556-mS6x5kMhW500cheS2AkN" 
upstream_id"00052738-5a5e-4ede-86ed-53986af63dd4" 
total_cost0.016775
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock" 

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
100.0000%