Run: 2026-05-31-01KSYXN0Q8GVJENY6W9DJCWP7D

Run Details

Duration:
14.3s
Cost:
$0.024675
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 of the story for you. <nc-section data-title="Chapter 2: The Knight's Welcome" data-color="red"> As I dismounted near the stables, a towering figure clad in polished armor strode toward me. His weathered face bore the scars of countless battles, yet his eyes held a surprising warmth. "You must be Frederick," he said, his voice deep and commanding. "I am Sir Roland, and I have been expecting you." He extended a calloused hand. "The Master at Arms spoke highly of your father. Let us hope you have inherited his courage." I clasped his hand firmly, trying to mask my nervousness. "I will do my best to honor his name, Sir Roland." A faint smile crossed his lips. "Good. We shall see what you are made of soon enough. The road ahead will test you in ways you cannot yet imagine." </nc-section> <nc-section data-title="Chapter 2: An Unexpected Greeting" data-color="green"> Before I could even tie Thunder to the post, a booming laugh echoed across the stable yard. A broad-shouldered knight emerged from the shadows, ale mug in one hand, a half-eaten apple in the other. "Ha! So this is the squire they've sent me?" Sir Roland bellowed, looking me up and down with amusement. "You're skinnier than my sword, lad!" I felt my cheeks flush, but there was no malice in his teasing. He tossed the apple to Thunder, who gobbled it gratefully. "Don't look so glum, boy," he chuckled, clapping me hard on the shoulder. "Every great knight was once a scrawny pup. Come, let me show you around before supper. And mind you keep up—I don't slow down for anyone." </nc-section> <nc-section data-title="Chapter 2: A Solemn Meeting" data-color="blue"> The stable yard was quiet as I led Thunder inside. A lone figure stood in the dim lantern light, methodically polishing a blade that gleamed like silver moonlight. "You've arrived later than expected," Sir Roland said without looking up. His tone was measured, careful. "The roads are dangerous these days. You were fortunate." He finally raised his gaze to meet mine, and I saw something heavy in his eyes—a weariness that spoke of dark times to come. "There are things stirring in this kingdom, Frederick. Things that have not been seen in a thousand years." He sheathed his sword slowly. "Your training begins at dawn. Rest while you can. I fear peaceful nights will soon be a luxury none of us can afford." </nc-section>
created_at"2026-05-31T11:45:32.917Z" 5/31/2026, 11:45:32 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1982
moderation_latency(null)
generation_time14242
tokens_prompt318
tokens_completion671
native_tokens_prompt435
native_tokens_completion900
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"
usage0.024675
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_0143sWqimXhH1d8GrWN7d9Td"
is_byokfalse
latency932
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-1780227932-ql62AdDVV6gDOGe549VH"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780227932-pDtOdbxrA5uqcmTXqoXj"
upstream_id"msg_0143sWqimXhH1d8GrWN7d9Td"
total_cost0.024675
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