Run: 2026-05-29-01KSSJVMWQXQ1DN3G5MFKHDZQY

Run Details

Duration:
15.6s
Cost:
$0.024500
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 scene. <nc-section data-title="Version 1: A Warrior's Welcome" data-color="red"> As I dismounted near the stables, the smell of hay and leather filling my lungs, a towering figure emerged from the shadows. Sir Roland was a mountain of a man, his weathered face crisscrossed with scars that told stories of countless battles. His armor gleamed despite the fading light, and a great sword hung at his hip. "So, you're the new squire," he rumbled, his voice like distant thunder. He looked me up and down with steel-gray eyes that seemed to pierce straight through me. "Smaller than I expected. But I've seen mighty oaks grow from the humblest of acorns." He extended a calloused hand. "I am Sir Roland, and I will be the one to forge you into something worthy of these walls—or break you in the trying." </nc-section> <nc-section data-title="Version 2: An Unexpected Kindness" data-color="green"> I had barely tied Thunder to the post when a warm voice called out to me. "You must be Frederick! We've been expecting you." A man approached with an easy smile, his bearing noble yet his manner gentle. Sir Roland was younger than the legends had led me to believe, with kind eyes and a face quick to laughter. "Don't mind the gruff faces you'll meet inside," he said, clapping a friendly hand on my shoulder. "This castle can seem cold to newcomers, but you'll find warmth here if you know where to look." He gestured toward the stables. "Come, let's see your horse settled first. A knight who neglects his mount neglects himself—that's the first lesson I'll teach you, and the most important one many forget." </nc-section> <nc-section data-title="Version 3: A Mysterious Encounter" data-color="blue"> The stable yard was unnaturally quiet as I led Thunder inside. A lone figure stood in the doorway, silhouetted against the dying light, watching me with an unreadable expression. Sir Roland did not greet me at first—he simply observed, as though weighing some private decision. "You arrive at a strange time, young Frederick," he finally said, his voice low and measured. He stepped forward, and I noticed how his hand never strayed far from his sword, even here in this place of supposed safety. "There are things stirring in this kingdom that the castle whispers about but dares not speak aloud." His eyes flicked toward the darkening horizon. "Tend to your horse, then come find me. We must talk before the others wake, for what I have to tell you is not for every ear." </nc-section>
created_at"2026-05-29T10:00:43.678Z" 5/29/2026, 10:00:43 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2045
moderation_latency(null)
generation_time15559
tokens_prompt318
tokens_completion680
native_tokens_prompt435
native_tokens_completion893
native_tokens_completion_images(null)
native_tokens_reasoning28
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"
usage0.0245
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01GLztxC9pTYpLGqmqPjNChb"
is_byokfalse
latency1009
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-1780048843-zFS5c0WeOyUtCI4UUVi9"
session_id(null)
api_type"completions"
id"gen-1780048843-ez11MdWYOA1VRck7U295"
upstream_id"msg_01GLztxC9pTYpLGqmqPjNChb"
total_cost0.0245
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