Run: 2026-07-25-01KYCPRJYVT9KBBV6THNDEY4DV

Run Details

Duration:
31.9s
Cost:
$0.044700
Provider:
Amazon Bedrock

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: The Iron Handshake" data-color="red"> The stable yard smelled of hay and hot iron. I had barely swung down from Thunder's back when a shadow fell across the straw, and I turned to find a man built like a siege engine standing in the archway. "You'll be the boy from Aldermere," he said. It was not a question. His beard was the color of rusted mail, his surcoat marked with the leaping hart of the House of Vaine. "I am Sir Roland. I am the man who will either make something of you, or bury what's left." I bowed, too deep and too fast, and my scabbard clattered against the stones. He did not laugh. That, somehow, was worse. He crossed the yard, took Thunder's bridle in one scarred hand, and ran the other down the stallion's foreleg with a gentleness that seemed borrowed from another man entirely. "You rode him hard," Sir Roland said. "The last three leagues at a gallop, unless my eyes have gone." "I did not wish to arrive late, my lord." "You arrived on a lame horse instead." He straightened, and his eyes found mine, and I understood then that being looked at by Sir Roland was a kind of weather one simply endured. "Remember this, squire: a knight who spends his mount to save an hour has traded a year for a minute. There will be a night — and it will come — when that hour is the only wall between you and the dark. Rub him down. Walk him until the sweat dries. Then find me in the hall, and we will speak of why they truly sent you here." He turned and walked away before I could ask what he meant by *truly*. </nc-section> <nc-section data-title="Version 2: A Warmer Welcome" data-color="green"> "Ho! Mind the gate-post — it's claimed better riders than you!" The voice came laughing from the stables, and out of the lamplight stepped a knight in a mud-splattered gambeson, sleeves rolled to the elbow, a currying brush still in his fist. He was younger than I had expected a knight to be, though old enough that grey had begun its slow siege upon his temples. "Sir Roland Ashgrove," he said, wiping his palm on his thigh before offering it. "Master-at-arms, horse-doctor, and, on feast days, chief carver of the goose. You must be Frederick." I clasped his hand. His grip was strong but unhurried. "They told me you'd come with a letter of introduction," he went on, taking Thunder's reins as though the horse were an old acquaintance. "Keep it. I've never met a letter that could hold a shield-wall. What I want to know is whether you eat well, sleep sound, and rise when you're called. Everything else is teaching, and teaching I can manage." "I rise early, Sir." "Then you're already ahead of half the boys in this castle." He nodded toward the great hall, where the windows glowed amber. "Supper's mutton, and there's not much of it, so I'd not dawdle. But see to your horse first. Always the horse first, Frederick. That's the whole of chivalry, when you strip the poetry off it — the beast that carries you eats before you do." He handed me the brush, and there was such simple kindness in the gesture that I felt, for the first time since leaving my mother's door, that I might survive this place. </nc-section> <nc-section data-title="Version 3: Something in the Wind" data-color="blue"> The knight was waiting for me. That was the thing I would remember afterward — not his face, nor the drawn quality of it, but the fact that he stood in the stable door with his arms folded and his eyes on the eastern hills, as though he had been standing there a long while and expecting something other than a boy on a tired horse. "Frederick," he said. "Sir Roland. Get him inside." No greeting. No hand offered. He took Thunder's bridle himself and drew the stallion into the dark of the stables with a haste that made the horse shy. "Sir, is something —" "Shut the door behind you." I shut it. In the sudden gloom I could hear the other horses shifting in their stalls, all of them awake, none of them settled. A dozen animals holding their breath. Sir Roland set his back against the timbers and let out a slow sigh, and only then did I see how grey his face was beneath the road-dust. "You came up the east road," he said quietly. "Through the Ashen Vale." "I did, Sir." "And you saw nothing? Heard nothing? No smoke on the ridge, no sound in the high air?" I thought of it — the strange stillness of the vale, the birds that had not sung, the shadow that had crossed the sun so briefly I had blamed a cloud. My mouth went dry. "There was a shadow," I said. "I thought it was a cloud." Sir Roland closed his eyes. When he opened them again, something in him had settled, the way a man settles who has been dreading a thing and is at last relieved of the dread. "Then it has begun," he said, "and you have come to us on the very last quiet evening this castle will ever know. Welcome to Vaine, squire. Eat well tonight." </nc-section>
created_at"2026-07-25T13:17:19.2Z" 7/25/2026, 1:17:19 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1177
moderation_latency(null)
generation_time31855
tokens_prompt303
tokens_completion1251
native_tokens_prompt435
native_tokens_completion1701
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.0447
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqgK4syL9czwtJL9gFs"
is_byokfalse
latency1177
model_permaslug"anthropic/claude-opus-5-20260723"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784985439-FAAxk63icCFJ7eUYXqul"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985439-ePxKZzcI2lBWwvUVJMDx"
upstream_id"msg_011CdNqgK4syL9czwtJL9gFs"
total_cost0.0447
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)
data_region"global"

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