NC Bench
Overview
About
Tests
Models
Model
Claude Sonnet 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGYWXS44V3V1MY7EN4XETD4P
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: The Stern Welcome" data-color="red"> As I dismounted near the stables, a towering figure emerged from the shadows. Sir Roland, the castle's master-at-arms, stood before me with arms crossed over his broad chest. His scarred face bore no smile, and his steel-gray eyes assessed me with the cold precision of a man who had seen a thousand hopefuls come and go. "You're late," he said, his voice like gravel. "The sun has already begun its descent, and you dare arrive at this hour? In my day, squires arrived at dawn, ready to prove their worth." He circled around Thunder, inspecting both horse and rider. "We'll see if you have what it takes, boy. The dragon's shadow grows longer each day, and we have no time for weakness." </nc-section> <nc-section data-title="Version 2: The Warm Mentor" data-color="green"> A hearty laugh echoed from the stable entrance as a broad-shouldered knight approached, his weathered face creasing into a genuine smile. Sir Roland extended his hand in greeting, his grip firm but welcoming. "Ah, young Frederick! Your reputation precedes you," he said warmly, giving Thunder an appreciative pat on the neck. "Fine steed you have there. I can see you take good care of him—that speaks well of your character." He gestured toward the castle. "Come, you must be exhausted from your journey. Let's get Thunder settled, and then I'll show you to your quarters. Tomorrow begins your training in earnest, but tonight, you are my guest. There's much I wish to tell you about the old ways, and the dragon that once protected these lands." </nc-section> <nc-section data-title="Version 3: The Mysterious Encounter" data-color="blue"> The stable yard was empty save for the dancing shadows cast by flickering torches. I led Thunder toward the nearest stall when a figure materialized from the darkness—so suddenly and silently that my hand instinctively moved to my sword hilt. "Peace, young squire." Sir Roland's voice was soft, almost musical, quite unlike what I had expected from a seasoned warrior. His eyes held an otherworldly gleam in the torchlight. "You arrive on an auspicious night. The stars align as they did twenty years ago, when the last dragon took flight." He placed a hand on my shoulder, and I felt a strange warmth spread through me. "Tell me, Frederick—do you dream of dragons? Because they have been dreaming of you." </nc-section>
created_at
"2026-02-08T15:11:47.907842+00:00"
Sunday, February 8th, 2026 at 3:11:47 PM GMT+00:00
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1950
moderation_latency
175
generation_time
12077
tokens_prompt
282
tokens_completion
547
native_tokens_prompt
335
native_tokens_completion
601
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
0.01002
router
(null)
provider_responses
0
id
"81c19f4a-a745-46a1-96f5-bd78dd0807ec"
status
200
is_byok
false
latency
1950
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1770563495-U6b977j7xm6OwxmpKO0X"
upstream_id
"81c19f4a-a745-46a1-96f5-bd78dd0807ec"
total_cost
0.01002
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%