NC Bench
Overview
About
Tests
Models
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
Messages
Meta
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_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1600
moderation_latency
314
generation_time
12790
tokens_prompt
282
tokens_completion
539
native_tokens_prompt
335
native_tokens_completion
604
native_tokens_completion_images
(null)
native_tokens_reasoning
0
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.016775
router
(null)
provider_responses
0
id
"00052738-5a5e-4ede-86ed-53986af63dd4"
status
200
is_byok
false
latency
1599
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_cost
0.016775
cache_discount
(null)
upstream_inference_cost
0
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%