NC Bench
Overview
About
Tests
Models
Model
Claude Opus 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGYYSPEN7V0WMYKNW7XWPGF7
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 broad-shouldered man in polished armor approached with measured steps. His silver hair caught the fading sunlight, and a scar traced a path from his left temple to his jaw. "You must be the new squire," he said, his voice deep and resonant. "I am Sir Roland, Knight of the Eastern Watch. I've been expecting you, young Frederick." He extended a gauntleted hand, and I grasped it firmly, trying to hide the trembling in my fingers. His grip was like iron, but his eyes held a warmth that put me at ease. "Welcome to Castle Thornwood. Your training begins at dawn." </nc-section> <nc-section data-title="Version 2" data-color="green"> A stable boy rushed forward to take Thunder's reins as I slid from the saddle, my legs aching from the long journey. Before I could gather my belongings, a booming laugh echoed across the courtyard. "By the old gods, they're sending them younger every year!" I turned to find a knight striding toward me, his red cloak billowing behind him. Sir Roland was nothing like I had imagined—he was younger than my father, with a easy smile and mischief dancing in his dark eyes. "Frederick, yes? Your uncle wrote to me about you." He clapped a hand on my shoulder, nearly buckling my knees. "Said you had spirit. We shall see if that's true soon enough." </nc-section> <nc-section data-title="Version 3" data-color="blue"> The stables smelled of hay and leather, a comforting scent after days on the road. I was brushing Thunder's coat when a shadow fell across the stall door. "Most squires let the stable hands tend to their mounts." I spun around to face a lean, weathered knight leaning against the doorframe. His arms were crossed, and he studied me with an unreadable expression. This had to be Sir Roland—I recognized the dragon crest emblazoned on his chest plate. "My father taught me that a knight who doesn't care for his horse doesn't deserve one, my lord," I replied, standing straighter. For a long moment, silence hung between us. Then, slowly, the corner of his mouth lifted. "Your father taught you well. Perhaps there's hope for you yet, Frederick." </nc-section>
created_at
"2026-02-08T15:44:31.861781+00:00"
Sunday, February 8th, 2026 at 3:44:31 PM GMT+00:00
model
"anthropic/claude-4.5-opus-20251124"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1517
moderation_latency
(null)
generation_time
12899
tokens_prompt
282
tokens_completion
510
native_tokens_prompt
335
native_tokens_completion
575
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
0.01605
router
(null)
provider_responses
0
id
"msg_01TggWUiY1o37fta4o7jkki4"
status
200
is_byok
false
latency
1400
endpoint_id
"be883404-eb42-4b2d-b6e4-c7daa3aa8d62"
provider_name
"Anthropic"
model_permaslug
"anthropic/claude-4.5-opus-20251124"
api_type
"completions"
id
"gen-1770565458-GeeR1UTKRG8AdsBowGX6"
upstream_id
"msg_01TggWUiY1o37fta4o7jkki4"
total_cost
0.01605
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%