NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-10-09-01M4FXWC8FMX5JC9HNFETAGHY1
Run Details
Model:
Claude Haiku 5.5 (Reasoning, Low)
Test:
Write N of X
Scenario:
50 sentence summary
Duration:
13.3s
Cost:
$0.001677
Provider:
Claude Platform on AWS
Evaluation summary
Score
Evaluator
Details Link
99.90%
Matches sentence count
(details)
Model input
User/Human
Summarize the following text into exactly 50 sentences, only return the summary itself: Jack Harper's fingers drummed against the polished bar top, the rhythm a stark contrast to the lazy steel drum music floating through the air. The salty breeze ruffled his meticulously styled hair, carrying the scent of coconut sunscreen and grilled seafood. Sunset Cove was a far cry from Wall Street, and his body knew it. His shoulders, usually tight with the weight of million-dollar deals, didn't know what to do with this forced relaxation. He glanced at his watch. 6:30 PM. In New York, he'd be heading into a late meeting, not... whatever this was. "Another scotch. Neat." A melodic laugh floated over the bar noise. "Rough day at the beach?" Jack's head snapped up, his gaze colliding with a pair of eyes that put the tropical waters to shame. The bartender's lips curved in amusement, a stark contrast to the judgmental stares he was accustomed to in New York. "I don't see how anyone gets any work done around here." "That's the point." She slid the scotch towards him, her movements fluid and unhurried. "We don't." Jack's fingers closed around the glass, but he didn't lift it. "Some of us have empires to build." "And some of us are happy with sandcastles." She leaned forward, her voice dropping to a conspiratorial whisper. The scent of vanilla and sea salt enveloped him. "They're more fun to knock down anyway." A reluctant smile tugged at Jack's lips. His gaze dropped to her name tag. "Sandy, right?" "Good eye, Mr..." "Harper. Jack Harper." "Well, Mr. Harper, what brings a suit like you to our little slice of paradise? You stick out like a penguin at a flamingo party." Jack loosened his tie, suddenly aware of how out of place he must look. "Business. Though I'm starting to question my CEO's choice of location for our corporate retreat." Sandy grabbed a pineapple from a nearby fruit bowl, spinning it in her hands like a basketball. "Let me guess. You're more of a concrete jungle type? All go, no slow?" "The numbers don't lie. Time is money, and this place..." He waved his hand at the laid-back patrons, the swaying palm trees, the endless stretch of golden sand visible through the open-air bar. A pair of surfers trudged past, boards under their arms, laughing about something he couldn't hear. "It's a productivity black hole." Sandy's eyebrow arched, a challenge sparking in her eyes. "Maybe you're looking at the wrong numbers." "Excuse me?" She set the pineapple down and gestured towards the horizon. The setting sun painted the sky in brilliant oranges and pinks, its light dancing off the waves. "How much would you pay for that view in New York?" Jack's gaze followed her hand, lingering on the breathtaking canvas nature had laid out. *Damn*. "Point taken." "So, Jack Harper, master of the universe, what's your grand plan for Sunset Cove domination? Going to turn our little tiki bars into high-rises?" He chuckled, surprised by how easily she drew him in. There was something about her – a spark, a quick wit that both challenged and intrigued him. "Would you believe me if I said I was here to destroy your quaint little town and build a mega-resort?" Sandy's eyes widened in mock horror. She pressed a hand to her chest, her expression comically aghast. "You monster. And here I thought you were just another handsome face in an overpriced suit." "Handsome, huh?" "Don't let it go to your head. We get all types here." She grabbed a cocktail shaker, her hands moving with practiced ease as she mixed a drink for another customer. "Last week we had a guy who thought he was a mermaid. Now *that* was a look." Jack leaned in, mirroring her earlier movement. The bar's bamboo edge dug into his stomach, but he barely noticed. "And what type am I?" Sandy paused, studying him with an intensity that made his pulse quicken. "The kind that needs to loosen his tie and remember how to breathe." She reached out, her fingers brushing his collar. Jack froze, caught off guard by the casual intimacy. "You've got a bit of New York still clinging to you. Might want to dust that off if you plan on surviving here." Their eyes locked, a challenge sparked between them. Jack felt a flutter in his chest that had nothing to do with the scotch. For a moment, the bar faded away. The music, the laughter, the crash of waves on the shore – it all became white noise. A loud crash from the other end of the bar shattered the moment. Sandy straightened, professional mask sliding back into place. "Duty calls. Looks like someone's had a few too many Mai Tais." "Wait-" Jack started, not ready for the conversation to end. Sandy glanced back, a mischievous glint in her eye. "Try not to work too hard, Mr. Harper. You might accidentally enjoy yourself." She sauntered away, navigating the crowded bar with ease. Jack watched her go, drawn to the confidence in her stride, the way other patrons lit up as she passed. *What the hell just happened?* He turned back to the bar, catching his reflection in the mirrored backsplash. His tie hung loose, his usually perfectly coiffed hair tousled by the sea breeze. He hardly recognized himself. His phone buzzed, shattering the moment. A message from Marcus flashed on the screen: "Update on the Sinclair account? Don't forget why you're there, Harper." Reality came crashing back. Jack downed the rest of his scotch, the expensive liquor wasted on his suddenly dry throat. He stood, straightening his tie and smoothing back his hair. *Focus, Harper. You're not here to flirt with bartenders.* But as he walked out, the warm wood of the deck creaking under his polished shoes, he couldn't help glancing back. Sandy stood behind the bar, laughing at something a customer said. The fading sunlight caught her hair, turning it to spun gold. *This could be a problem.* The ocean breeze hit him as he stepped onto the beach, carrying away the last notes of the bar's music. Jack paused, his shoes sinking slightly into the sand. To his left, the neatly manicured path led back to the resort – back to his laptop, his reports, his familiar world of numbers and deals. To his right, the beach stretched out, wild and inviting. A few people lingered, silhouetted against the darkening sky. A couple walked hand in hand at the water's edge. A child's delighted shriek carried on the wind as they chased the retreating waves. Jack's phone buzzed again. Another message from Marcus. He looked back at the Tiki Hut. Through the windows, he could just make out Sandy's profile as she mixed another drink. *Get it together, Harper. Eyes on the prize.* With a final glance at the sunset, Jack turned left, his shoes leaving perfectly formed imprints in the sand as he headed back to his room. But even as he walked away, he could still hear Sandy's laugh, could still feel the ghost of her fingers against his collar. Sunset Cove, it seemed, had more to offer than he'd bargained for.
Model response
Messages
Meta
AI
Jack Harper, a New York businessman, sits at a beachside bar in Sunset Cove, struggling to relax. The salty breeze and the scent of coconut sunscreen fill the open-air space. He is tense from the pressure of high-stakes deals and feels out of place among the laid-back crowd. At 6:30 PM, he thinks about the late meeting he would be attending back in New York. Jack's usual composure feels strained by the easygoing atmosphere. He orders a scotch, and a bartender named Sandy teases him about having a rough day at the beach. Sandy's playful confidence catches his attention immediately. Jack complains that the resort seems unproductive, and Sandy replies that the point is not to get work done. He admits he has empires to build, while she says she is happy with sandcastles. Sandy notices his suit and comments that he stands out like a penguin at a flamingo party. Jack loosens his tie and mentions that he is there for a corporate retreat. He was surprised by how easily she drew him into conversation. Sandy teases him as a concrete jungle type who never slows down. Jack dismisses the resort as a productivity black hole. Sandy challenges him by pointing to the sunset and asking how much that view would cost in New York. Jack concedes the point, impressed by the view. Her quick wit both challenges and intrigues him. Jack jokes that he is there to build a mega-resort, and Sandy plays along with mock horror. She admits he is more than just a handsome face in an overpriced suit. Jack finds himself flattered and amused by her teasing. Sandy shares a story about a guest who believed he was a mermaid. Jack leans closer, asking what type of man he is, and Sandy suggests he needs to loosen up and breathe. She brushes his collar, and the casual intimacy leaves him momentarily frozen. She warns him that he still carries New York with him and must shed it to survive there. Her words linger in his mind long after she speaks them. Their gaze locks, and Jack feels a spark of attraction. The sounds of the bar fade into background noise around them. Jack feels a flutter in his chest that has nothing to do with the alcohol. A crash at the other end of the bar interrupts the moment. Sandy returns to work, teasing him about not working too hard and perhaps enjoying himself. Jack watches her leave, drawn to her confidence. Her easy rapport with the other patrons is obvious to him. He questions what just happened and looks at his reflection, barely recognizing his loosened appearance. A text from his colleague Marcus reminds him about the Sinclair account. Jack downs his scotch, straightens up, and reminds himself he is there for work. As he leaves, he glances back and sees Sandy laughing with a customer, her hair glowing in the sunlight. Her presence leaves him unsettled in a way he did not expect. He realizes Sandy could become a problem. On the beach, he pauses between the path to the resort and the open, lively shoreline. The resort path represents his familiar world of laptops, reports, and deals. The beach offers couples walking hand in hand and a child laughing as the waves retreat. The peaceful scene contrasts sharply with the pressure of his New York life. Marcus texts again, and Jack looks back toward the Tiki Hut. He sees Sandy's silhouette through the windows as she mixes another drink. Jack hesitates, caught between duty and curiosity. He tells himself to focus on his goal. After a last look at the sunset, Jack heads back toward his room, leaving shoe prints in the sand. He still hears Sandy's laugh and feels the memory of her touch on his collar. The story closes with the idea that Sunset Cove has more to offer than he expected.
created_at
"2026-10-09T08:53:37.685Z"
10/9/2026, 8:53:37 AM
model
"anthropic/claude-haiku-5.5-20261007"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2341
moderation_latency
(null)
generation_time
13238
tokens_prompt
1768
tokens_completion
1444
native_tokens_prompt
2486
native_tokens_completion
2856
native_tokens_completion_images
(null)
native_tokens_reasoning
1631
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
0.0016766
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1791536017-eNMQXo5YBNruI2LHObcg"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1791536017-wTTmT4toypow1W5Ql7qN"
upstream_id
"msg_011CfrP3dar5Vba4e94V2R2K"
provider_responses
0
endpoint_id
"b6cdf493-3a61-441f-a134-e7944fddb980"
id
"msg_011CfrP3dar5Vba4e94V2R2K"
is_byok
false
latency
808
model_permaslug
"anthropic/claude-haiku-5.5-20261007"
provider_name
"Claude Platform on AWS"
status
200
total_cost
0.0016766
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Claude Platform on AWS"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
99.90%
Matches sentence count
n/a
neededClean
false
sentences
49