NC Bench
Overview
About
Tests
Models
Model
Claude Sonnet 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGYZBVA2T02KRRGHWA4TXHNS
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: A Warm 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, strode forward with a broad smile creasing his weathered face. "Frederick, I presume?" His voice was deep and welcoming. He clasped my shoulder with a firm hand. "Your father spoke highly of you in his letters. Come, let me show you to your quarters. Tomorrow, your training begins in earnest." His eyes sparkled with kindness, and I felt my nervousness begin to fade. </nc-section> <nc-section data-title="Version 2: A Test of Character" data-color="green"> The stable master pointed toward a knight inspecting the horses. "Sir Roland," he called out. The knight turned, his armor gleaming even in the fading light. His eyes were cold, assessing. "So, you're the new squire," he said, his tone flat. He circled me slowly, like a predator evaluating prey. "Can you muck a stall? Polish armor until you can see your reflection? Because nobility of birth means nothing here, boy. Only your actions matter." He tossed me a brush. "Start with Thunder. When he's properly groomed, find me in the great hall." </nc-section> <nc-section data-title="Version 3: An Unexpected Friendship" data-color="blue"> I led Thunder into the stables, where a knight was tending to his own mount—a dappled grey mare. He looked up and grinned. "You must be Frederick! I'm Sir Roland." He was younger than I expected, perhaps only ten years my senior, with laugh lines around his eyes. "Don't worry about the formal stuff. We're going to be spending a lot of time together." He grabbed Thunder's reins. "Here, let me help you with that. This old boy looks tired from the journey. Tell me about yourself—where are you from? What made you want to become a knight?" </nc-section>
created_at
"2026-02-08T15:54:23.438694+00:00"
Sunday, February 8th, 2026 at 3:54:23 PM GMT+00:00
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2030
moderation_latency
178
generation_time
9707
tokens_prompt
282
tokens_completion
437
native_tokens_prompt
335
native_tokens_completion
479
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
0.00819
router
(null)
provider_responses
0
id
"2e74b92b-3546-4cfc-9433-43ef3a306652"
status
200
is_byok
false
latency
2030
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1770566053-l8CvxPOmkiIFSNzvZBqY"
upstream_id
"2e74b92b-3546-4cfc-9433-43ef3a306652"
total_cost
0.00819
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%