NC Bench
Overview
About
Tests
Models
Model
Claude Opus 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGYZ2F9RVV28MGVQMEZCKVX9
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 purposeful strides. His silver beard caught the fading sunlight, and a long scar traced down his left cheek—a testament to battles long past. "You must be Frederick," he said, his voice deep and commanding. "I am Sir Roland, Knight Commander of this keep. I've been expecting you." He extended a gauntleted hand, and I clasped it firmly, trying to hide my nervousness. His grip was like iron. "Your father was a good man," Sir Roland continued, his eyes softening momentarily. "Let us see if his courage lives on in you." </nc-section> <nc-section data-title="Version 2" data-color="green"> The stable hands rushed forward to take Thunder's reins, but before I could gather my belongings, a booming laugh echoed across the courtyard. "So this is the whelp they've sent me to train!" I turned to find a mountain of a man striding toward me, his armor gleaming despite the countless dents and scratches that told stories of a hundred battles. Sir Roland was exactly as the legends described—impossibly tall, with arms like tree trunks and a grin that seemed equal parts welcoming and challenging. "Scrawny thing, aren't you?" He circled me slowly, stroking his gray-streaked beard. "No matter. I've forged knights from far less. Welcome to your new home, boy." </nc-section> <nc-section data-title="Version 3" data-color="blue"> I had barely led Thunder into the stable's shadow when I noticed the figure leaning against the wooden post, watching me with keen interest. The knight wore no helmet, revealing weathered features and eyes the color of storm clouds. "You ride well," Sir Roland observed quietly, pushing himself upright. "But riding is the least of what you'll need to survive here." He didn't offer his hand or his name—he didn't need to. Everyone in the kingdom knew the face of the man who had single-handedly held the Bridge of Sorrows against the Northern horde. "Settle your horse. Find your quarters. Training begins at dawn." He turned to leave, then paused. "And Frederick? Get some sleep. You'll need it." </nc-section>
created_at
"2026-02-08T15:49:19.305935+00:00"
Sunday, February 8th, 2026 at 3:49:19 PM GMT+00:00
model
"anthropic/claude-4.5-opus-20251124"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1655
moderation_latency
(null)
generation_time
12866
tokens_prompt
282
tokens_completion
494
native_tokens_prompt
335
native_tokens_completion
557
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
0.0156
router
(null)
provider_responses
0
id
"msg_01LBGYPabtHEfRnv9VHPJy4h"
status
200
is_byok
false
latency
1564
endpoint_id
"be883404-eb42-4b2d-b6e4-c7daa3aa8d62"
provider_name
"Anthropic"
model_permaslug
"anthropic/claude-4.5-opus-20251124"
api_type
"completions"
id
"gen-1770565745-ej6CtEbAg2LicsL1M1L0"
upstream_id
"msg_01LBGYPabtHEfRnv9VHPJy4h"
total_cost
0.0156
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%