Run: 2026-07-25-01KYCR50YM95934H1ABTSN9CAJ

Run Details

Duration:
28.6s
Cost:
$0.039750
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 Hand" data-color="red"> The stables smelled of hay and warm animal breath, a comfort after the long road. I had barely swung down from the saddle when a shadow fell across the straw. "So. You're the one they sent me." He was broader than any man I had ever seen, his surcoat still dark with the sweat of the training yard, a scar carving a pale road from his left ear to his jaw. He did not offer his hand. Instead he took Thunder's bridle, examined the bit, the girth, the sweat on the stallion's flank, and only then did he look at me. "Sir Roland," he said. "You rode him hard through the last mile. Vanity, or fear of the dark?" I opened my mouth and found nothing in it worth saying. "Both, then." Something moved at the corner of his mouth that was not quite a smile. "Good. A boy who lies to me on the first evening is a boy I must break twice. Water him, walk him, rub him down. When your horse is comfortable, you may think about your own supper. Not before." He turned away, then paused. "What's your name, squire?" "Frederick, my lord." "Frederick." He said it the way a smith tests a blade, listening for the flaw. "We shall see what it's worth." </nc-section> <nc-section data-title="Version 2: The Warm Welcome" data-color="green"> I led Thunder through the gate and into the long shadow of the stables, where lanterns had already been lit against the coming dusk. A man sat on an overturned barrel there, cleaning a saddle with a rag and the unhurried patience of someone who had done it ten thousand times. "Ah!" He rose, and he was tall, grey at the temples, with the sort of weathered face that seemed made for laughing. "The squire from the river country. We expected you at midday, and Cook has been muttering curses over the pie since." "The road was longer than the maps promised, sir." "Roads always are. Roland." He clasped my forearm rather than my hand, a knight's greeting, and I felt the old callus of a sword hilt against my skin. "Sir Roland, if the Marshal is listening, but he never is at this hour." He looked past me at Thunder and let out a low whistle. "And what a beast. Grey Highland stock in that shoulder, or I'll eat my own boots." "His name is Thunder." "Of course it is." He grinned. "Every boy names his first horse for weather. Come — there's a stall at the end with fresh straw, and I'll show you where to hang your tack so the rats don't feast on it. Then we shall see about that pie, and you shall tell me why a boy with such a horse comes to a castle as quiet as ours." I did not know, then, how little quiet that autumn would leave us. </nc-section> <nc-section data-title="Version 3: The Shadow at the Gate" data-color="blue"> Thunder shied before I saw the man, tossing his head hard enough to nearly wrench the reins from my grip. He had smelled something in the dark of the stable doorway. "Peace." The word was quiet, and the stallion went still at once, as though the voice had reached some older part of him than sense. "Peace, now. It isn't you I'm troubled by." A knight stepped out into the last of the light. His mail was travel-stained, his shield slung across his back and scorched along its lower rim — blackened, blistered, the paint of the kingdom's crest bubbled into something unrecognisable. He carried the smell of burning with him. "You're the new squire," he said. It was not a question. "Frederick." "Yes, my lord." "Roland." His eyes went past me to the northern hills, and stayed there a moment too long. "You came by the north road?" "By the west, sir. The ford at Ellsmere." Something in his shoulders eased. "Good. Keep to the west road, boy, while you serve here. Whatever the Marshal tells you, whatever wager the other lads offer you — the west road." He reached out and ran a hand down Thunder's neck, and I saw that his fingers were trembling, very slightly, and that he knew it, and that he did not care whether I saw. "Stall your horse," he said. "Say nothing of my shield to anyone. And Frederick — if you wake in the night and the dogs are silent, do not go to the window." </nc-section>
created_at"2026-07-25T13:41:35.324Z" 7/25/2026, 1:41:35 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2928
moderation_latency117
generation_time28399
tokens_prompt303
tokens_completion1104
native_tokens_prompt435
native_tokens_completion1503
native_tokens_completion_images(null)
native_tokens_reasoning51
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"
usage0.03975
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNsXfFZ4EyQmavEgYFBG"
is_byokfalse
latency1239
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-1784986895-oXscZW6U72beVeXRgjRd"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986895-mGUZ73ARdKamvVMb4GWT"
upstream_id"msg_011CdNsXfFZ4EyQmavEgYFBG"
total_cost0.03975
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