NC Bench
Overview
About
Tests
Models
Model
Claude Opus 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGZ063QDAY1F4JBS73EGWY1G
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 Thunder near the stables, a towering figure emerged from the shadows. Sir Roland stood before me, his silver armor gleaming in 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 like gravel. He clasped my shoulder with a gauntleted hand. "I've heard much about you, young Frederick. Your father was a good man—a brave soldier. Let us see if you carry his spirit within you." I bowed my head respectfully. "I hope to honor his memory, Sir Roland." </nc-section> <nc-section data-title="Version 2" data-color="green"> The stable hands rushed forward to take Thunder's reins as I slid from the saddle, my legs stiff from the long journey. I was brushing the dust from my traveling cloak when a commanding voice cut through the evening air. "You must be Frederick." I turned to find Sir Roland approaching, his crimson cape billowing behind him. He was younger than I had expected, perhaps thirty winters, with a neatly trimmed beard and piercing grey eyes that seemed to assess my every weakness in a single glance. "Welcome to Thornhaven Castle," he continued, extending his hand. "I trust the road was not too treacherous. Come—we have much to discuss before the evening meal." </nc-section> <nc-section data-title="Version 3" data-color="blue"> I had barely led Thunder into the stable's shelter when I heard the unmistakable ring of steel against steel. Peering around the wooden beam, I spotted a knight practicing his swordwork against a training dummy, each strike precise and devastating. He stopped mid-swing, sensing my presence. "Ah, the squire arrives at last." Sir Roland sheathed his blade and strode toward me, sweat glistening on his brow despite the cool evening air. His reputation as the kingdom's fiercest swordsman suddenly felt very real. "I don't coddle my squires," he warned, though a hint of a smile played at his lips. "But those who survive my training become legends. Are you prepared for that, boy?" I swallowed hard and nodded. "I am, Sir Roland." </nc-section>
created_at
"2026-02-08T16:08:47.710907+00:00"
Sunday, February 8th, 2026 at 4:08:47 PM GMT+00:00
model
"anthropic/claude-4.5-opus-20251124"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1895
moderation_latency
(null)
generation_time
13378
tokens_prompt
282
tokens_completion
485
native_tokens_prompt
335
native_tokens_completion
555
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
0.01555
router
(null)
provider_responses
0
id
"msg_01NbgZLLPi3o9pnBCScRXA85"
status
200
is_byok
false
latency
1895
endpoint_id
"be883404-eb42-4b2d-b6e4-c7daa3aa8d62"
provider_name
"Anthropic"
model_permaslug
"anthropic/claude-4.5-opus-20251124"
api_type
"completions"
id
"gen-1770566913-r6W8kOHiJJN8aKtj7ORI"
upstream_id
"msg_01NbgZLLPi3o9pnBCScRXA85"
total_cost
0.01555
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Anthropic"
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%