Run: 2026-07-25-01KYCR7NH48TRPVBRXMCDR93DB

Run Details

Duration:
32.7s
Cost:
$0.045550
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 Warm Welcome" data-color="red"> The stables smelled of hay and horse sweat, a scent I had known since childhood, and it steadied me as I swung down from Thunder's back. My legs nearly buckled — three days in the saddle will do that to a boy. "Careful, lad. The ground has a way of rising up to meet travelers." The voice came from the shadow of the doorway, and then its owner stepped into the last of the daylight. He was broad as a barn door, with grey threading through a beard that had clearly been red once, and a scar that ran from his left ear down beneath his collar. He wore no armor, only a padded gambeson stained dark at the armpits, but he carried himself the way a mountain carries snow — as though it had always been there and always would. "Sir Roland," he said, offering a hand that swallowed mine whole. "Master-at-arms, when the lord remembers to call me so. Stable-hand and nursemaid the rest of the time." He looked past me to Thunder and something in his face softened. "Now *that* is a horse. Whose is he?" "Mine, sir." "Yours." He laughed — a great booming thing that sent the pigeons scattering from the rafters. "Then you've one thing more than most who come through that gate. Most arrive with a sword their father couldn't sell and a head full of songs." He clapped my shoulder hard enough to rattle my teeth. "Come. Rub him down first — always the horse first, Frederick, remember that — and then I'll find you supper. You look like a scarecrow that's lost its stuffing." He knew my name. I had not given it. </nc-section> <nc-section data-title="Version 2: The Cold Measure" data-color="green"> He was waiting for me at the stables, and I understood at once that he had been waiting a long while. He stood with his arms folded, a lean man in a black surcoat, and he did not move as I dismounted. He did not offer to take my reins. He watched me the way a farmer watches a hen he suspects of eating eggs. "You are late," he said. "The bridge at Marden was out, sir. I had to go around by—" "You are late." He let the words settle. "The bridge at Marden has been out since Candlemas. Any man in the village would have told you, had you thought to ask. Instead you rode until you found water and then rode along it hoping the river would be kind." He tilted his head. "Was it?" "No, sir." "No." Something that was almost, but not quite, approval crossed his face. "I am Roland. You will call me Sir Roland until I tell you otherwise, and I will not tell you otherwise. That animal is too good for you. Where did you steal him?" "He was a gift from my father." "Then your father is either very rich or very foolish, and I have never known a rich man to be generous." He unfolded his arms at last and stepped past me to run a hand down Thunder's flank, and Thunder — who had bitten a bishop — stood as still as a statue in a churchyard. "Stall at the end. Water, then hay, then oats, in that order, and not a mouthful before he's cooled. If I find him lame in the morning you will walk home." He was halfway to the keep before he spoke again, without turning. "Frederick. The kitchens close at full dark. They will not wait for you either." </nc-section> <nc-section data-title="Version 3: The Man in the Straw" data-color="blue"> There was a man asleep in the straw outside the third stall, and I nearly trod on him. He came awake all at once, the way soldiers do, one hand already at his hip where no sword hung. Then he saw me — a boy holding a horse, gaping — and the tension went out of him like water from a cracked jug. "Ah," he said, and rubbed his face. "You'd be the new one." He was perhaps forty, perhaps sixty; it was hard to say through the dirt. Straw stuck out of his hair at three separate angles and he made no effort to remove it. When he stood, I heard his knees complain, and he groaned in sympathy with them. "Roland," he said. "Sir, if we're being formal, and we won't be. They gave me a knighthood at Ashford Ford because it was cheaper than a pension." He squinted at Thunder. "Big fellow. Does he bite?" "Only bishops, sir." Sir Roland stopped. He looked at me properly for the first time, and I saw that his eyes were not sleepy at all — they were pale and quick and utterly awake, and they had been awake the whole time. "Bishops," he repeated. "Well. We'll get along, you and I." He plucked a straw from his hair and stuck it in the corner of his mouth. "Put him in the end stall, the one with the good door. And Frederick — when you come up to the hall, do not tell them you found me sleeping. Let them go on thinking I'm out walking the walls at dusk like a proper knight. It's the only reputation I have left, and I'm fond of it." He walked off whistling something tuneless, and it was only later — much later — that I realized he had never asked my name. </nc-section>
created_at"2026-07-25T13:43:01.935Z" 7/25/2026, 1:43:01 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2748
moderation_latency(null)
generation_time32568
tokens_prompt303
tokens_completion1291
native_tokens_prompt435
native_tokens_completion1735
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"
usage0.04555
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNse358Rw9rYTEL5B7rM"
is_byokfalse
latency1041
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-1784986981-PlzFjtzw8kjGFGZMaAgo"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784986981-b9t7I8NyblpfM1wVsylx"
upstream_id"msg_011CdNse358Rw9rYTEL5B7rM"
total_cost0.04555
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