NC Bench
Overview
About
Tests
Models
Model
Claude Opus 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGYYY41GP51CTED2E03MYG1X
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 broad-shouldered figure emerged from the shadows of the gatehouse. Sir Roland's armor gleamed even in the fading light, his weathered face bearing the scars of countless battles. He clasped my forearm in greeting, his grip like iron. "So you're the one Lord Ashworth sent," he said, his voice deep as rolling thunder. "I expected someone... taller." I straightened my spine, meeting his gaze. "I may lack height, Sir Roland, but I assure you I do not lack determination." A hint of a smile played at the corner of his lips. "We shall see, young Frederick. We shall see." </nc-section> <nc-section data-title="Version 2" data-color="green"> The stable master took Thunder's reins as I slid from the saddle, my legs aching from three days of hard riding. I was stretching my sore muscles when a voice called out from behind me. "Frederick of Millbrook, I presume?" I turned to find Sir Roland approaching, his crimson cloak billowing behind him. He was younger than I had imagined—perhaps thirty winters—with kind eyes that seemed at odds with the sword hanging at his hip. "You've arrived just in time for supper," he said warmly, clapping a hand on my shoulder. "Come. Let us get some food in your belly before we discuss your training. A hungry squire is a useless squire, my father always said." </nc-section> <nc-section data-title="Version 3" data-color="blue"> I had barely secured Thunder in his stall when the clatter of armor announced someone's approach. Sir Roland appeared in the stable doorway, his silhouette framed against the dying light. He said nothing at first, simply watching as I brushed down my horse with careful, practiced strokes. "You tend to your mount before yourself," he observed quietly. "Good. Too many young men forget that their horse may one day be the only thing standing between them and death." He stepped closer, and I noticed the dragon sigil emblazoned on his breastplate—the mark of those who had faced the great beasts and lived. "Welcome to Thornhaven, Frederick. Your real education begins at dawn." </nc-section>
created_at
"2026-02-08T15:46:55.447198+00:00"
Sunday, February 8th, 2026 at 3:46:55 PM GMT+00:00
model
"anthropic/claude-4.5-opus-20251124"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1545
moderation_latency
246
generation_time
11441
tokens_prompt
282
tokens_completion
481
native_tokens_prompt
335
native_tokens_completion
547
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
0.01535
router
(null)
provider_responses
0
id
"b479a26e-93d9-4e5e-b26b-51c3c9bc0c38"
status
200
is_byok
false
latency
1545
endpoint_id
"de32581c-2e11-4f54-8d29-e8a6e19d3038"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-opus-20251124"
api_type
"completions"
id
"gen-1770565603-BjmEtWfUv5ONmtTPyLKN"
upstream_id
"b479a26e-93d9-4e5e-b26b-51c3c9bc0c38"
total_cost
0.01535
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%