Run: 2026-09-29-01M3P2J959FTVSJZ20JGQSBQKZ

Run Details

Duration:
13.0s
Cost:
$0.013544
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"> The stable yard smelled of hay, leather, and horse sweat, and I had barely swung down from Thunder's back when a shadow fell across me. The man was broad as a barn door, with a grey-shot beard and a scar that ran from his left ear to the corner of his jaw. His armor was dented in a dozen places, and he wore each dent like a medal. "You're late," he said. "The road from Alderbrook was longer than I was told, sir." "The road is always longer than you're told." He looked me up and down, lingering on my borrowed boots and the sword I had never once swung in anger. "I am Sir Roland. I'll be the one shouting at you for the next three years. Get used to the sound." He took Thunder's reins in one gauntleted hand, and to my surprise the stallion, who bit every stablehand back home, only huffed and lowered his head. "Good horse," Roland grunted. "Pity about the rider. We'll fix that." </nc-section> <nc-section data-title="Version 2: The Warm Hearth of Welcome" data-color="green"> A lantern glowed beside the stable doors, and beneath it stood a tall man with a weathered, kindly face and silver threaded through his auburn hair. He was rubbing the nose of a grey mare and murmuring to her as though she were an old friend. When he heard Thunder's hooves, he looked up and smiled. "You must be young Frederick," he called, crossing the yard with his hand outstretched. "We've watched the road for you since noon. I'm Sir Roland. Welcome to Castle Highmere." His grip was firm and warm. I had rehearsed a dozen formal greetings on the ride, but every one of them fled my mind. "I... thank you, Sir Roland. I hope I'm not too late for supper." He laughed, a rich sound that startled the sparrows from the rafters. "Lad, the cook always makes too much. Stable your horse, wash the dust from your face, and come to the kitchen. Training begins at dawn, but no squire of mine starts an empty-bellied." For the first time since leaving home, my shoulders loosened. </nc-section> <nc-section data-title="Version 3: The Knight with a Secret" data-color="blue"> I was unbuckling Thunder's saddle when I realized someone was watching me. An older knight leaned against the stable wall, so still that I might have mistaken him for part of the stonework. His cloak was the deep blue of the royal guard, and a pendant shaped like a curled dragon hung at his throat. "Steady hands," he said quietly. "Most boys fumble the girth strap when they're nervous." "I'm not nervous," I lied. "Of course not." The corner of his mouth twitched. "Sir Roland of Highmere. I'm told you're the boy who came with a letter from your uncle." I fumbled for the letter, but he raised a hand. "Keep it. I know what it says." His gaze drifted to the darkening hills beyond the wall, and something troubled passed across his face. "Listen well, Frederick. The castle has ears in odd places, and these are not peaceful times. Trust your horse, your sword, and me, in that order, until you know better." Before I could ask what he meant, he pushed off the wall and strode into the dusk, his dragon pendant glinting once in the last of the light. </nc-section>
created_at"2026-09-29T07:55:14.479Z" 9/29/2026, 7:55:14 AM
model"anthropic/claude-sonnet-5.5-20260928"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3331
moderation_latency(null)
generation_time12933
tokens_prompt303
tokens_completion875
native_tokens_prompt437
native_tokens_completion1267
native_tokens_completion_images(null)
native_tokens_reasoning122
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"
usage0.013544
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1790668514-0FA6gJcV4LL5tIthTYi8"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790668514-Uo1UzAopn1b8DJ7yneSQ"
upstream_id"msg_011CfXNWEUrQTyQqjK64c7DZ"
provider_responses
0
endpoint_id"99aaad94-923b-4fc1-b763-271ed5486f7a"
id"msg_011CfXNWEUrQTyQqjK64c7DZ"
is_byokfalse
latency659
model_permaslug"anthropic/claude-sonnet-5.5-20260928"
provider_name"Claude Platform on AWS"
status200
total_cost0.013544
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