Run: 2026-05-29-01KSSJZ9SSXYVNHD1RXJNSCJ5V

Run Details

Duration:
15.9s
Cost:
$0.025300
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
<nc-section data-title="A Gruff Welcome" data-color="red"> As I dismounted near the stables, a towering figure emerged from the shadows. Sir Roland, the castle's most renowned knight, stood with arms crossed, his weathered face scarred from countless battles. His armor bore the dents of war, and his eyes, sharp as a hawk's, studied me with unmistakable scrutiny. "So you're the new squire," he grunted, his voice like gravel. "Let's see if you've got more between your ears than the last three who came crawling here. Hand me those reins, boy, and don't drop them." I fumbled with Thunder's reins, my fingers trembling under his gaze. Sir Roland snorted, unimpressed, but I caught the faintest flicker of something behind his stern expression—perhaps a memory of his own first day, long ago. </nc-section> <nc-section data-title="An Unexpected Kindness" data-color="green"> I had barely slid down from Thunder's saddle when a warm, booming laugh echoed across the courtyard. Sir Roland approached with an easy stride, a broad smile splitting his bearded face. Though his frame was that of a seasoned warrior, his manner was as gentle as a summer morning. "Welcome, young Frederick!" he called, clapping a heavy hand on my shoulder. "We've been expecting you. Your father wrote to me, you know—spoke highly of your courage and your kind heart." He took Thunder's reins himself, stroking the stallion's neck with practiced affection. "A fine horse you've brought. Come, let me show you around before supper. There's much to learn, but there's no rush tonight. Tonight, you simply rest." His warmth eased the knot of nerves in my chest, and for the first time since leaving home, I felt I might truly belong. </nc-section> <nc-section data-title="A Test from the Start" data-color="blue"> As Thunder slowed to a halt by the stables, a knight stepped into my path so suddenly that my horse reared. Sir Roland, lean and quick-eyed, said nothing at first—he simply watched as I struggled to calm the panicked animal. "A knight who cannot master his own steed," he finally said, his tone cool and measuring, "will never master a blade, nor a battlefield, nor himself." I steadied Thunder at last, my breath ragged, and looked up to find Sir Roland already turning away. "Stable your horse. Then meet me in the training yard. We begin immediately—the kingdom does not wait for squires to find their feet." There was no warmth in his words, but there was no cruelty either. Only expectation. And I realized, in that moment, that my training had already begun. </nc-section>
created_at"2026-05-29T10:02:43.392Z" 5/29/2026, 10:02:43 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2355
moderation_latency(null)
generation_time15833
tokens_prompt318
tokens_completion710
native_tokens_prompt435
native_tokens_completion925
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"
usage0.0253
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01E1aJhfUm5Gax6L8ctj8oQe"
is_byokfalse
latency941
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-1780048963-w6LV0UQJGqoEWU8T1eKj"
session_id(null)
api_type"completions"
id"gen-1780048963-P7HTgWCa1t4vSiqpjsFd"
upstream_id"msg_01E1aJhfUm5Gax6L8ctj8oQe"
total_cost0.0253
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