NC Bench
Overview
About
Tests
Models
Model
Claude Sonnet 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGYXQQ7CP7VW4AJFF25NK471
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 Greeting" data-color="red"> I dismounted near the stables, my legs stiff from the long ride. A towering figure emerged from the shadows, his armor gleaming even in the fading light. Sir Roland, the castle's master-at-arms, stood before me with arms crossed, his weathered face set in a stern expression. "So you're the new squire," he said, his voice like gravel grinding beneath wagon wheels. "You're late. I expected you before sunset." He circled around Thunder, inspecting my horse with a critical eye. "At least you know how to care for your mount. That's more than I can say for the last three squires who came through those gates." I swallowed hard, feeling the weight of his scrutiny. "My apologies, Sir Roland. The northern road was flooded, and I—" "Excuses won't serve you here, boy," he interrupted, though I caught a glimmer of something that might have been approval in his eyes. "Stable your horse. You'll find me in the training yard at first light. Don't be late again." </nc-section> <nc-section data-title="Version 2: The Warm Welcome" data-color="green"> As I led Thunder toward the stable doors, a hearty laugh rang out across the courtyard. A knight in well-worn armor approached, his face creased with smile lines and his eyes twinkling with warmth. "Frederick, isn't it? Welcome, lad, welcome!" Sir Roland clasped my shoulder with a firm but friendly grip. "You've made excellent time—the road from the village can be treacherous this time of year." He patted Thunder's neck appreciatively. "And what a fine steed! He'll serve you well in your training." I felt the tension drain from my shoulders. "Thank you, Sir Roland. I'm honored to be here." "The honor is ours," he replied, guiding me toward the stables. "We need young men of courage and dedication. Come, let me show you where to settle your horse, and then we'll get you fed. You must be famished after your journey. Tomorrow, your real adventure begins." </nc-section> <nc-section data-title="Version 3: The Mysterious Encounter" data-color="blue"> The stable yard was quiet, too quiet. I dismounted cautiously, leading Thunder by the reins. A figure stood motionless in the archway of the stable, silhouetted against the lantern light within. "Frederick." The voice was neither warm nor cold, but measured and deliberate. Sir Roland stepped forward, and I noticed something unusual—a jagged scar ran from his temple to his jaw, and his right hand rested on the pommel of his sword, as if by habit rather than threat. "I've been expecting you," he continued, his eyes studying me with an intensity that made me feel as though he could see straight through to my soul. "Tell me, young squire, what do you know of dragons?" The question caught me off guard. "Dragons, sir? Only the old legends. They've been extinct for—" "Nothing is ever truly extinct," Sir Roland interrupted softly, glancing toward the distant mountains where storm clouds gathered. "Merely sleeping. Come, we have much to discuss, and very little time." </nc-section>
created_at
"2026-02-08T15:26:00.172242+00:00"
Sunday, February 8th, 2026 at 3:26:00 PM GMT+00:00
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2341
moderation_latency
148
generation_time
14246
tokens_prompt
282
tokens_completion
707
native_tokens_prompt
335
native_tokens_completion
773
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
0.0126
router
(null)
provider_responses
0
id
"0e3b15ce-e346-4fd2-a75d-d18cc7cd7e6c"
status
200
is_byok
false
latency
2340
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1770564345-zXwrGsyTp7S3FmXM8Mfh"
upstream_id
"0e3b15ce-e346-4fd2-a75d-d18cc7cd7e6c"
total_cost
0.0126
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%