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Run: 2026-02-24-01KJ8W1T5NRQ89X857HWJTX9MW
Run Details
Model:
Claude Opus 4.6 (Reasoning)
Test:
Tool usage within Novelcrafter
Scenario:
Create alternate prose sections
Duration:
32.0s
Cost:
$0.030990
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
Pass
Match blue prose section
(details)
Pass
Match green prose section
(details)
Pass
Match red prose section
(details)
no eval
Overall
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
Here are three alternate versions of the next scene: <nc-section data-title="Version 1: A Stern Welcome" data-color="red"> The stables loomed ahead, their weathered timber doors thrown wide to the evening air. Frederick dismounted clumsily, his legs stiff from the long ride, and nearly stumbled into a pile of fresh hay. When he straightened, a towering figure stood before him, arms crossed over a breastplate that bore the scars of a hundred battles. "You're late," said Sir Roland, his voice like gravel dragged across stone. His steel-grey eyes swept over Frederick from head to toe, lingering on the mud-caked boots and the ill-fitting sword belt that hung too loosely at his hip. "I expected you at midday. The sun is nearly gone." Frederick opened his mouth to explain — the washed-out bridge, the detour through Gallows Marsh — but Sir Roland raised a gauntleted hand. "Excuses are the currency of the weak, boy. Here, we trade in discipline." He turned sharply on his heel. "Stable your horse. Feed him before you feed yourself. Then find me in the east hall. Your training began the moment you passed through those gates — and you're already behind." Frederick swallowed hard, his fingers tightening around Thunder's reins. The stallion nudged his shoulder as if to say *courage*. He led the horse into the warmth of the stable, the scent of oat and leather wrapping around him like a promise — or perhaps a warning. </nc-section> <nc-section data-title="Version 2: An Unexpected Kindness" data-color="green"> Frederick had barely swung down from Thunder's back when a broad-shouldered man emerged from the stables, wiping his hands on a rag that had long since surrendered any claim to cleanliness. His face was sun-bronzed and lined with laugh lines that crinkled deeply as he smiled. "Ah, you must be the lad from Willowmere!" the man called warmly, tucking the rag into his belt. "Frederick, isn't it? I'm Sir Roland. Welcome to Ashenmoor Castle." Frederick blinked. He had expected a knight in gleaming armor, not a man in a simple linen tunic with straw clinging to his sleeves. Sir Roland noticed the boy's confusion and let out a rich, rumbling laugh. "Surprised to find a knight mucking stalls, are you?" He reached out and gave Thunder an appreciative pat along the neck. "Fine animal. A man who tends to his own horse tends to his own soul — that's the first lesson, free of charge." He winked. "Come. Let's get this fellow brushed down and watered. You and I can talk while we work. I want to hear everything about your journey." As Sir Roland led them into the stable, chatting easily about the roads and the weather, Frederick felt the tight knot of anxiety in his chest begin to loosen. Perhaps this new life would not be as fearsome as he had imagined. </nc-section> <nc-section data-title="Version 3: The Knight and the Dragon's Shadow" data-color="blue"> A groom rushed forward to take Thunder's reins, but the boy froze mid-step, eyes wide with sudden fear. Frederick followed his gaze and saw why — perched on the stable roof, its silhouette black against the dying sun, was the skeletal remain of a dragon's skull, mounted like a grotesque weathervane. "Unsettling, isn't it?" Frederick spun. A knight leaned against the stable doorframe, one boot crossed over the other, polishing a dagger with slow, deliberate strokes. He was younger than Frederick had expected — perhaps thirty — but his left arm ended just below the elbow, the sleeve pinned neatly against itself. "Sir Roland?" Frederick ventured. "The very same." The knight sheathed his dagger in a single fluid motion and pushed off the doorframe. His gaze drifted up to the skull. "Velmrath the Ember-Tongued. I took that trophy six years ago in the Blackspine Mountains. Cost me a hand and half my squadron." His voice held no pride — only the quiet weight of memory. "They say Velmrath was the last of the great drakes. They're wrong." A chill snaked down Frederick's spine that had nothing to do with the evening wind. Sir Roland fixed him with a look that burned brighter than any sunset. "That's why you're here, boy. I'm not training you to joust at tournaments or bow before lords. I'm training you to survive what's coming." He placed his remaining hand on Frederick's shoulder. "Come inside. We have much to discuss — and very little time." </nc-section>
created_at
"2026-02-24T22:24:24.767Z"
2/24/2026, 10:24:24 PM
model
"anthropic/claude-4.6-opus-20260205"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1404
moderation_latency
142
generation_time
31820
tokens_prompt
318
tokens_completion
1185
native_tokens_prompt
353
native_tokens_completion
1169
native_tokens_completion_images
(null)
native_tokens_reasoning
52
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
0.03099
router
(null)
provider_responses
0
endpoint_id
"a8708fb9-08ea-43bb-a3b1-165c87ef09df"
id
"83741aef-1f89-40c8-a507-77378c8600d1"
is_byok
false
latency
1369
model_permaslug
"anthropic/claude-4.6-opus-20260205"
provider_name
"Amazon Bedrock"
status
200
api_type
"completions"
id
"gen-1771971864-itWpAWwKsIoY4Xshmpjt"
upstream_id
"83741aef-1f89-40c8-a507-77378c8600d1"
total_cost
0.03099
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
no eval