NC Bench
Overview
About
Tests
Models
Model
Claude Sonnet 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGYZKSPGC0MQ17EW5VVF43FA
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"> As I dismounted near the stables, a towering figure emerged from the shadows. Sir Roland, his armor still bearing the dust of the training grounds, approached with heavy footsteps. His scarred face remained impassive as he looked me up and down. "So you're the new squire," he said, his voice like gravel. "I've seen many boys like you arrive with stars in their eyes. Most don't last a fortnight." He crossed his arms. "Give your horse to the stable boy and report to the barracks. Training begins at dawn, and I do not tolerate lateness." Without waiting for my response, he turned and strode away, his crimson cape billowing behind him. </nc-section> <nc-section data-title="Version 2: The Warm Welcome" data-color="green"> A hearty laugh rang out as I led Thunder toward the stables. Sir Roland strode forward, his weathered face breaking into a genuine smile. Despite the gray in his beard and the lines around his eyes, there was a youthful energy about him. "Welcome, young Frederick!" he exclaimed, clapping me on the shoulder with surprising warmth. "Your father wrote to me about you. Come, let me help you with your horse." As we walked Thunder to his stall, Sir Roland spoke animatedly about the castle, the other squires, and the adventures that awaited. "You'll do well here, lad," he said, his eyes twinkling. "I can see the makings of a fine knight in you already." </nc-section> <nc-section data-title="Version 3: The Mysterious Encounter" data-color="blue"> The stables were quiet save for the soft nickering of horses. I was brushing down Thunder when I heard the soft clink of chainmail behind me. I turned to find Sir Roland leaning against the stable door, studying me with an unreadable expression. "Frederick," he said quietly, almost as if testing the name on his tongue. His eyes, a piercing blue, seemed to look through me rather than at me. "Tell me—why have you really come here?" The question caught me off guard. Before I could answer, he stepped closer and lowered his voice. "These are dangerous times, boy. The castle holds secrets, and not everyone here is what they seem." He glanced over his shoulder, then back at me. "Watch, listen, and trust no one completely. Not even me." Then, as mysteriously as he had appeared, Sir Roland walked away, leaving me with more questions than answers. </nc-section>
created_at
"2026-02-08T15:58:45.117982+00:00"
Sunday, February 8th, 2026 at 3:58:45 PM GMT+00:00
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1612
moderation_latency
142
generation_time
10847
tokens_prompt
282
tokens_completion
554
native_tokens_prompt
335
native_tokens_completion
609
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
0.01014
router
(null)
provider_responses
0
id
"69827624-44fb-44f0-a3cf-a42961e44bf6"
status
200
is_byok
false
latency
1611
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1770566313-BCtPD1r95qJeudJblO7s"
upstream_id
"69827624-44fb-44f0-a3cf-a42961e44bf6"
total_cost
0.01014
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%