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Run: 2026-07-25-01KYCQY7SP53QZYE0VZJPG1TVK
Run Details
Model:
Claude Opus 5 (Reasoning, Low)
Test:
Tool usage within Novelcrafter
Scenario:
Create alternate prose sections
Duration:
29.9s
Cost:
$0.041300
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
Pass
Match blue prose section
(details)
Pass
Match green prose section
(details)
Pass
Match red prose section
(details)
no eval
Overall
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
Messages
Meta
AI
<nc-section data-title="Version 1: The Weight of a Hand" data-color="red"> Thunder's hooves clattered on the cobbles of the stableyard, and the smell of hay and horse-sweat and warm iron rose up to meet me like an old promise. I had barely swung down from the saddle when a shadow fell across my boots. He was enormous. Not tall — though he was tall enough — but *broad*, built like a door, with a grey-shot beard and a scar that ran from his left eyebrow into his hairline. He wore no armor, only a padded gambeson stained dark under the arms, and he was drying his hands on a rag that had clearly once been part of a nobler garment. "Frederick of Ashvale," he said. It was not a question. "Sir." I bowed too low, the way my mother had taught me, and nearly cracked my forehead on my own saddlebag. Something moved in his face that might have been the ghost of a smile. "Sir Roland. You'll be mine for the next three years, gods and your own thick skull permitting." He reached past me and laid one great hand on Thunder's neck, and my horse — who had bitten two grooms and a bishop — went still as a statue. "Good animal. Better than the boy who rides him, I expect. Come. Supper's finished, so you'll eat cold, and then you'll muck out these stalls before you sleep." "Tonight, sir? I've ridden since —" "Tonight." He tossed me the rag. "The first thing a knight learns, lad, is that the world does not care how far you've ridden." </nc-section> <nc-section data-title="Version 2: A Warmer Welcome" data-color="green"> I found the stables by the sound of them — that low, contented shuffling of a dozen horses settling into the dark — and led Thunder in beneath the beams. Lanterns hung at intervals, and in the pool of golden light nearest the door, a knight sat on an upturned bucket, mending a bridle with a curved needle. He looked up, and his whole face opened like a window. "Ha! The squire! We'd wagered you'd come tomorrow." He rose, dropped the bridle into the straw without a second thought, and clasped my hand in both of his. His palms were rough as bark. "Roland. Sir Roland, if there are lords about, but there are no lords about, so — Roland." "Frederick, sir." "I know. I knew your father." He said it lightly, but he held my hand an instant longer than he needed to, and I understood that a great deal had just been said and left unsaid. Then he released me and clapped Thunder's flank. "And who is this fine fellow?" "Thunder." "*Thunder.*" Roland's eyebrows climbed. "Did you name him at eleven?" "Nine, sir." "Then I forgive it entirely." He took the reins from me with the ease of a man who had done it ten thousand times. "Come, there's bread and a bit of the venison the cooks think they hid from me. Eat, sleep, and be terrified tomorrow. It's the proper order of things." </nc-section> <nc-section data-title="Version 3: The Stranger at the Stable Door" data-color="blue"> The stableyard was quieter than it should have been. No grooms, no clatter of buckets — only a single figure standing in the archway, silhouetted against the last red smear of the sun, waiting as though he had been waiting a long while. Thunder stopped without my asking him to. "You're late," the man said. "The road through the Brackens was flooded, sir. I had to go round by the mill." "I know. I sent a rider to warn you and he never came back." He stepped out of the archway, and I saw a lean, weathered knight with pale eyes and a sword belted on — actually belted on, here, inside his own walls, at supper hour. "Sir Roland. Your master, as of this evening. Bring the horse inside and shut the door behind you." "Is something wrong, sir?" He did not answer at once. He looked past me, out along the darkening line of the fields I had just crossed, and his hand rested on the pommel the way another man's hand rests on a table. "Three of the villages east of here have gone silent this fortnight," he said. "And the sky over the Spine has been the wrong color for nine nights running." Then he turned, and the pale eyes settled on me with an attention I had not earned. "You came at an interesting time, Frederick of Ashvale. Get inside. We'll speak of your training when I'm certain there'll be time for it." </nc-section>
created_at
"2026-07-25T13:37:52.958Z"
7/25/2026, 1:37:52 PM
model
"anthropic/claude-opus-5-20260723"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4299
moderation_latency
221
generation_time
29437
tokens_prompt
303
tokens_completion
1135
native_tokens_prompt
435
native_tokens_completion
1565
native_tokens_completion_images
(null)
native_tokens_reasoning
51
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"end_turn"
service_tier
"default"
usage
0.0413
router
(null)
provider_responses
0
endpoint_id
"76cb4608-f48c-483d-8da8-9957fb44244e"
id
"msg_011CdNsFHVfHtB53NApvu3Zc"
is_byok
false
latency
1249
model_permaslug
"anthropic/claude-opus-5-20260723"
provider_name
"Amazon Bedrock"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer
(null)
request_id
"req-1784986673-A7p7dF3eogBAv2x2gNka"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1784986673-7omv0c8iq1CUwZ0RSZbW"
upstream_id
"msg_011CdNsFHVfHtB53NApvu3Zc"
total_cost
0.0413
cache_discount
(null)
upstream_inference_cost
0
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