Model

Claude Opus 4.5

Test

Tool usage within Novelcrafter

Scenario

Create alternate prose sections

Run ID

2026-02-08-01KGYX4H31804SME8K470D95GH

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

AI
<nc-section data-title="Version 1" data-color="red"> As I dismounted Thunder near the stables, a broad-shouldered figure emerged from the shadows of the gatehouse. Sir Roland was everything the stories had promised—a weathered face marked by countless battles, a silver-streaked beard, and eyes that seemed to measure a man's worth in a single glance. "You must be Frederick," he said, his voice like gravel. He didn't offer his hand, but instead took Thunder's reins from me with practiced ease. "Your father wrote that you were eager. Eagerness can get a squire killed." He paused, studying me. "It can also make him great. We shall see which fate awaits you." </nc-section> <nc-section data-title="Version 2" data-color="green"> The stable hands rushed forward to take Thunder's reins, but a commanding voice cut through the evening air. "Leave him! A squire tends to his own mount." I turned to find Sir Roland striding toward me, his armor catching the last rays of sunlight. He was younger than I had expected, perhaps thirty winters, with a sharp jawline and a scar that traced from his left ear to the corner of his mouth. "Welcome to Ashford Keep, boy," he said, clapping a heavy gauntlet on my shoulder. A smile played at his lips. "I hope you've said your farewells to soft beds and hot meals. Your new life begins now." </nc-section> <nc-section data-title="Version 3" data-color="blue"> I had barely led Thunder into the stable yard when I heard the rhythmic clang of a blacksmith's hammer fall silent. A knight in simple riding leathers approached, wiping his hands on a cloth. There was nothing imposing about him at first glance—average height, an unassuming face, hair the color of straw. "Frederick of Millbrook?" he asked quietly. "Yes, my lord. I seek Sir Roland—" "You've found him." His grey eyes held mine, and in that moment I understood why my father had sent me here. There was something ancient in that gaze, something that had seen darkness and survived it. "Come. We have much to discuss, and very little time. The dragon stirs again." </nc-section>
created_at"2026-02-08T15:15:29.627415+00:00" Sunday, February 8th, 2026 at 3:15:29 PM GMT+00:00
model"anthropic/claude-4.5-opus-20251124" 
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1858
moderation_latency(null)
generation_time12698
tokens_prompt282
tokens_completion485
native_tokens_prompt335
native_tokens_completion533
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/" 
is_byokfalse
finish_reason"stop" 
native_finish_reason"stop" 
usage0.015
router(null)
provider_responses
0
id"msg_01WuV23u1r1SDe4zFf6pMcUr" 
status200
is_byokfalse
latency1858
endpoint_id"be883404-eb42-4b2d-b6e4-c7daa3aa8d62" 
provider_name"Anthropic" 
model_permaslug"anthropic/claude-4.5-opus-20251124" 
api_type"completions" 
id"gen-1770563716-GtJnPONDJBfKRR21YNko" 
upstream_id"msg_01WuV23u1r1SDe4zFf6pMcUr" 
total_cost0.015
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic" 

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%