NC Bench
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Run: 2026-02-16-01KHK9Z57H9NR3K3HFY0B1P4SS
Run Details
Model:
GPT-5 Nano
Test:
Tool usage within Novelcrafter
Scenario:
Create alternate prose sections
Duration:
43.6s
Cost:
$0.001589
Provider:
OpenAI
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: Red — The Knight at the Stables" data-color="red"> Thunder's breath fogged the air as I guided Thunder toward the stable row. The yard smelled of hay and leather, lanterns casting warm pools of gold on weather-worn wood. From the shadow of a stall, Sir Roland stepped forward, the local knight's helm tucked under his arm and a calm, practiced grace in his movements. "Frederick, I take it," he said, voice steady with a hint of amusement. "I am Sir Roland, your guide for these first days. Welcome to the castle." He extended a gauntleted hand, and Thunder snorted, as if approving the greeting. I inclined my head, feeling the weight of the knight's stern kindness settle over me like a cloak. "We will begin with the basics—your stance, your grip, and how to read a horse," he continued, stepping closer so the horse's ears lay forward in interest. The horses around us stamped and clucked; I found my courage in the knight's presence and followed him toward the yard where the drills would start. </nc-section> <nc-section data-title="Version 2: Green — A Salute by Sir Roland" data-color="green"> Near the troughs of the stables, the clatter of hooves fell silent as Sir Roland approached. He wore his plate with casual ease, sun-worn leather at his waist, and the steady gaze of someone who has judged a hundred squires and found them wanting only once. "Frederick," he said, voice low and direct, "I am Sir Roland, guardian of this wing of the castle. You must be prepared to earn your keep." He paused, letting the moment stretch, then added with a half-smile, "Name, origin, and what you hope to learn here." I answered and felt the weight of the question in my chest. The knight nodded once, and with a practiced motion he patted Thunder's neck. "Your horse is a partner, not a quarry. Treat him as such, and he will carry you farther than you ever dreamed." He turned then toward the gate, but not before saying, "Meet me at dawn for your first lesson." We stepped back into the fading light, and the stableyard exhaled as if releasing a long-held breath. </nc-section> <nc-section data-title="Version 3: Blue — The Gatehouse Greeting" data-color="blue"> A ripple of shade parted as Sir Roland emerged from the row of stalls, armor catching the blue evening light. He paused beside Thunder and me, a measured smile crossing his features. "Frederick," he announced, tone halfway between ceremony and invitation, "I am Sir Roland, local knight and your mentor until you prove yourself worth more than a name." He offered a rough-gloved hand, then withdrew it to run a hand over Thunder's neck, reading the animal's mood as if he were reading a page. "You ride well, squires grow stiff with pride," he quipped, and the corner of his mouth curved higher. "Show me you can steady your nerves, keep your posture, and listen when the horse breathes." The stable's light glinted off his helm as he stepped closer, guiding me with a firm, friendly grip toward the path that led into the castle proper. The night cooled the air, and I found in his greeting a strange blend of challenge and kinship. </nc-section>
created_at
"2026-02-16T13:25:04.494667+00:00"
2/16/2026, 1:25:04 PM
model
"openai/gpt-5-nano-2025-08-07"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
17733
moderation_latency
(null)
generation_time
43507
tokens_prompt
318
tokens_completion
1439
native_tokens_prompt
302
native_tokens_completion
3934
native_tokens_completion_images
0
native_tokens_reasoning
3200
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
"completed"
usage
0.0015887
router
(null)
provider_responses
0
id
"resp_043eb4d9b57104770169931a846bec81908ecbb97a112597f2"
status
200
is_byok
false
latency
142
endpoint_id
"50329d77-04e1-4979-a184-c33030289476"
provider_name
"OpenAI"
model_permaslug
"openai/gpt-5-nano-2025-08-07"
api_type
"completions"
id
"gen-1771248260-kGsufFARNnOJCHTfrRcj"
upstream_id
"resp_043eb4d9b57104770169931a846bec81908ecbb97a112597f2"
total_cost
0.0015887
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
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%