Run: 2026-09-29-01M3P2FWHV05QJGVG7W4X50NSV

Run Details

Duration:
13.4s
Cost:
$0.013754
Provider:
Claude Platform on AWS

Evaluation summary

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: A Gruff Welcome" data-color="red"> I slid from Thunder's back just as the gates groaned open behind me. My legs were stiff from the long ride, and the smell of hay and horse sweat hung in the air. Near the stables, a broad-shouldered man in a dented breastplate was leaning against a post, arms crossed, watching me with a scowl. "You're late, boy," he said. His voice was like gravel in a bucket. "I was told the new squire would arrive by midday." "The roads were flooded near the river, my lord," I stammered. "I had to go around." He looked me over from boots to hair, and then, to my surprise, one corner of his mouth twitched. "I am Sir Roland. I'm no lord, and you'll not call me one. Good excuse, though. Most lads simply lie." He took Thunder's reins in one scarred hand and ran the other down the stallion's neck. "Fine animal. Better than you deserve, I'd wager. Come, we'll see whether you can rub him down as well as you ride him." </nc-section> <nc-section data-title="Version 2: The Warm Hearth of Welcome" data-color="green"> A stable boy hurried out to take Thunder, but before I could dismount fully, a deep and cheerful voice called out from the shadow of the stable doors. "Ho there! You must be Frederick!" The man who strode toward me was tall and silver-bearded, with laugh lines etched deep around his eyes. His cloak was patched at the shoulder, and he carried a bucket of oats as casually as if it were a sword. "Sir Roland of Eastmarch," he said, clasping my forearm in a firm grip. "I've been watching the road since noon. Your uncle wrote that you were stubborn and quick to learn. I hope both are true, because we'll need the first to survive the second." I laughed in spite of my nerves. The tightness in my chest that had followed me for three days loosened a little. "Now," said Sir Roland, nodding toward the warm glow of the kitchens, "the stables can wait. Nobody trains on an empty stomach, not under my watch. Let's find you some stew." </nc-section> <nc-section data-title="Version 3: The Knight in the Twilight" data-color="blue"> Dusk settled over the courtyard as I led Thunder toward the stables. Lanterns were being lit one by one, and their light trembled on the cobblestones. I did not notice the knight until he spoke. "That is a horse bred for war," he said quietly. "Not many squires arrive on such a mount." He stood at the edge of the lantern light, a lean figure in a gray cloak, one hand resting on the pommel of a long sword whose scabbard was worn smooth with age. His face was weathered, his eyes pale and watchful, like those of someone who had seen much and forgotten little. "I am Sir Roland," he continued. "I keep the eastern watch, and now, it seems, I keep you." He stepped forward and studied Thunder, then me. "Tell me, Frederick, do you know why the castle gates were closed early tonight?" I shook my head. "Good," he said softly. "Then you have not yet heard the rumors. Settle your horse. We will speak after." A chill crept along my spine that had nothing to do with the evening air. </nc-section>
created_at"2026-09-29T07:53:56.032Z" 9/29/2026, 7:53:56 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3897
moderation_latency(null)
generation_time13380
tokens_prompt303
tokens_completion855
native_tokens_prompt437
native_tokens_completion1288
native_tokens_completion_images(null)
native_tokens_reasoning170
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.013754
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668436-B9MmU0yXTcbIkG16jHeW"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668436-HRTsLizJU3iHF8tk4r20"
upstream_id"msg_011CfXNQT3VB45TqRT3HqeDs"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNQT3VB45TqRT3HqeDs"
is_byokfalse
latency617
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.013754
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

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