Run: 2026-06-01-01KT1H5DRQ9XTPR2ZT2ZCPJT41

Run Details

Duration:
15.2s
Cost:
$0.021275
Provider:
Anthropic

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
I'll create three alternate continuations for this moment. <nc-section data-title="Version 1: A Warm Welcome" data-color="red"> As I dismounted near the stables, a broad-shouldered man strode toward me, his armor catching the last rays of sunlight. His beard was streaked with gray, and a long scar traced down his left cheek, yet his eyes were kind. "You must be Frederick," he said, clasping my forearm in a firm grip. "I am Sir Roland. We've been expecting you." He glanced at Thunder with an appraising eye. "A fine animal. A squire is only as good as how he treats his horse—remember that." He gestured toward the stable doors. "Come, let us see him settled before the evening meal." </nc-section> <nc-section data-title="Version 2: A Cold Reception" data-color="green"> I had barely swung down from the saddle when a shadow fell across me. A knight stood there, arms crossed over his battered breastplate, watching me with narrowed eyes. "So you're the new squire," he said, his voice gruff as gravel. "Sir Roland. And I'll tell you now, boy—I've buried better recruits than you who thought training was a game." He spat into the dirt. "The castle has no use for soft hands or softer hearts. Prove me wrong, or pack your bags before sunrise." He turned on his heel. "Stable your horse. Then find me. We begin tonight." </nc-section> <nc-section data-title="Version 3: A Mysterious Encounter" data-color="blue"> As I led Thunder toward the stables, a figure emerged from the shadows between the wooden beams. He moved without a sound, despite the weight of his armor, and when he stepped into the torchlight I saw a face that seemed far older than his years. "Frederick," he said—though I had told no one my name. "I am Sir Roland." His gaze drifted past me, toward the darkening sky, as if searching for something hidden among the stars. "You arrive at a strange hour, on a stranger night. There are things stirring in these lands that the maesters do not speak of." Then his eyes met mine, sharp and certain. "But that is a tale for another time. Come. The horse needs rest, and so do you." </nc-section>
created_at"2026-06-01T12:05:02.368Z" 6/1/2026, 12:05:02 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3141
moderation_latency(null)
generation_time15128
tokens_prompt318
tokens_completion588
native_tokens_prompt435
native_tokens_completion764
native_tokens_completion_images(null)
native_tokens_reasoning43
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"
usage0.021275
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_019Z7GwUQQpQzQLhePRYEeV1"
is_byokfalse
latency1977
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780315502-dIObTq1URGaSNOnW5XfQ"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780315502-oPdrSXvjBjsuSo4xZoCz"
upstream_id"msg_019Z7GwUQQpQzQLhePRYEeV1"
total_cost0.021275
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

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