NC Bench
Overview
About
Tests
Models
Model
Claude Opus 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGYX9Z6ANFDB2ZF3EDA9DK5N
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 silver armor catching the last rays of sunlight. His weathered face broke into a warm smile, deep lines crinkling around his eyes. "So, you're the young Frederick I've heard so much about," he said, his voice a deep rumble like distant thunder. He clasped my shoulder with a gauntleted hand. "Your father was a fine man. I expect great things from his son." I bowed my head respectfully. "I hope to honor his memory, Sir Roland." </nc-section> <nc-section data-title="Version 2" data-color="green"> A stable boy rushed 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 rang out across the courtyard. "You there! Squire!" I turned to find Sir Roland striding toward me, his crimson cape billowing behind him. He was smaller than I had imagined—compact and lean—but there was an intensity in his dark eyes that made me straighten my spine immediately. "Frederick of Ashworth, I presume?" He circled me slowly, assessing. "You're late. Training begins at dawn. Don't make me regret accepting you." </nc-section> <nc-section data-title="Version 3" data-color="blue"> The smell of hay and horses filled my nostrils as I led Thunder into the stable. I was searching for an empty stall when I nearly collided with a man carrying a saddle over his shoulder. He wore simple clothes, mud-stained and practical. "Watch yourself, lad," he chuckled, setting down the saddle. "My apologies, sir. I'm looking for Sir Roland—I'm to be his new squire." The man's eyes twinkled with amusement. He wiped his hands on his trousers and extended one toward me. "Then you've found him. I find a knight learns more about a horse—and a squire—when he tends the stables himself. Welcome to your new life, Frederick." </nc-section>
created_at
"2026-02-08T15:18:26.147118+00:00"
Sunday, February 8th, 2026 at 3:18:26 PM GMT+00:00
model
"anthropic/claude-4.5-opus-20251124"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1806
moderation_latency
157
generation_time
11115
tokens_prompt
282
tokens_completion
460
native_tokens_prompt
335
native_tokens_completion
528
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
0.014875
router
(null)
provider_responses
0
id
"ab0cc7d4-191e-423d-aa4b-01603db90b44"
status
200
is_byok
false
latency
1806
endpoint_id
"de32581c-2e11-4f54-8d29-e8a6e19d3038"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-opus-20251124"
api_type
"completions"
id
"gen-1770563894-LIvwCFSDUhbWV1myJK9B"
upstream_id
"ab0cc7d4-191e-423d-aa4b-01603db90b44"
total_cost
0.014875
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%