NC Bench
Overview
About
Tests
Models
Model
Claude Sonnet 4.5
Test
Tool usage within Novelcrafter
Scenario
Create alternate prose sections
Run ID
2026-02-08-01KGZ000FKEN9T5M2N7FEARGB2
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 scarred from countless battles, regarded me with piercing eyes that seemed to measure my worth in an instant. "You're late, boy," he growled, his voice like gravel scraping stone. "We don't coddle squires here. If you can't manage punctuality, you'll never survive what's coming." He seized Thunder's reins from my trembling hands. "Your training begins at dawn. Don't disappoint me." </nc-section> <nc-section data-title="Version 2: The Warm Welcome" data-color="green"> A warm laugh echoed across the courtyard as I guided Thunder toward the stables. Sir Roland strode forward, his weathered face breaking into a genuine smile. "Welcome, young Frederick! Your father spoke highly of you in his letters." He clasped my shoulder firmly but kindly. "Come, let me help you with your horse. Thunder, is it? A fine beast." As we walked together, he spoke of the castle, the training grounds, and the brotherhood of knights. "You'll find a home here, lad. We take care of our own." </nc-section> <nc-section data-title="Version 3: The Mysterious Encounter" data-color="blue"> The stable master was nowhere to be seen when I arrived, but a cloaked figure stood waiting in the doorway. As he stepped into the fading light, I recognized the silver dragon emblem on his chest—Sir Roland. His expression was unreadable, neither warm nor cold. "Frederick," he said quietly, glancing around as if ensuring we were alone. "There are things you must know, things they won't teach you in formal training. The realm faces dangers beyond what you've been told." He moved closer, his voice dropping to a whisper. "Meet me tonight, after the bells toll midnight. Come alone." </nc-section>
created_at
"2026-02-08T16:05:24.97207+00:00"
Sunday, February 8th, 2026 at 4:05:24 PM GMT+00:00
model
"anthropic/claude-4.5-sonnet-20250929"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1849
moderation_latency
156
generation_time
9951
tokens_prompt
282
tokens_completion
425
native_tokens_prompt
335
native_tokens_completion
464
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
0.007965
router
(null)
provider_responses
0
id
"9696d5f2-c2e9-4bd6-8161-be39572549aa"
status
200
is_byok
false
latency
1849
endpoint_id
"d8bee848-f020-454a-b2be-4a7ce868f99f"
provider_name
"Amazon Bedrock"
model_permaslug
"anthropic/claude-4.5-sonnet-20250929"
api_type
"completions"
id
"gen-1770566713-M7GeiH9QXy455lwapW7F"
upstream_id
"9696d5f2-c2e9-4bd6-8161-be39572549aa"
total_cost
0.007965
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%