Get live statistics and analysis of Spencer Mateega's profile on X / Twitter

ceo @afterquery. prev statistics + finance + cs @ wharton / penn, @silverlake_news, @google, @morganstanley, @meta

1k following978 followers

The Innovator

Spencer Mateega is a visionary CEO at AfterQuery, leveraging his rich background in statistics, finance, and computer science to revolutionize how expertise is scaled using data-driven AI. His tweets showcase a passion for cutting-edge technology and the transformation of professional knowledge into machine-learnable datasets. Spencer combines academic rigor with entrepreneurial spirit to lead innovation at the intersection of data and AI.

Impressions
150k-145.5k
$28.11
Likes
883-849
56%
Retweets
132-131
8%
Replies
106-100
7%
Bookmarks
461-458
29%

Top users who interacted with Spencer Mateega over the last 14 days

@reggitales

@dexbythirdlayer • math & cse @harvard dropout • download Dex now for free!

2 interactions
@Om_Gandhi1

PhD Student @UniofOxford @NIH via @Rhodes_Trust + @NIHOxCam | BA/MS @Penn | Cancer immunology, synthetic biology, imaging, and AI/ML

1 interactions
1 interactions
@vcjesse1

Founder & VC at Failup Ventures. Vibe investing in early-stage companies in the US and Nordics. Previously founder/cto/product

1 interactions
@InsightsBySE

Autodidact building predictive and forecasting systems. Never doubt a Marine on a mission. #SemperFi

1 interactions
@Kevrmoore

Technocapitalist

1 interactions
@abhayjoshi1104

Software Engineer | AfterQuery | Striving to Best. Github: github.com/abhayjoshi201 Linkedin: linkedin.com/in/abhay-joshi…

1 interactions
1 interactions
@mcgillvc

Venture capital club run out of @mcgillu. Follow us for local VC happenings & updates on us!

1 interactions
@qucaroly

@stanford symsys & cs alum. lover of parks (specifically of the national and public kinds)

1 interactions
@apatwa7

studied cs and business at wharton.

1 interactions
@whynesspower

Engineering at Observe.AI (YC’18) | Prev at @hexoai (Antler'22) | Built & launched 6 times last year • AI Agents Specialist • Young, Wild & HUNGRYY |

1 interactions
1 interactions
@shrawberryy

☆ designer, artist, writer turning physical experiences into digital ones

1 interactions
@taylorcontarino

digital marketing manager for (an artist)🤎🎧 founder @taylormariellc | writer | singer-songwriter | actress | la + usc alum | taycontarino@gmail.com💌

1 interactions
@adgtomiwa

Python || LiverpoolFC || shenanigans

1 interactions
1 interactions
@DT53662771

Travelling & Building go hand in hand

1 interactions

Spencer’s tweets are so deep in the machine-learning matrix, sometimes it feels like you need a PhD in quantum physics just to retweet — but hey, at least the bots are probably nodding in agreement.

Launching AfterQuery and successfully positioning its UI-Bench as the leading benchmark for UI/web design tools, attracting attention from influential tech players and pioneering a novel approach to coding tool evaluation.

To democratize and exponentially scale specialized expertise by building advanced datasets and tools that empower machines to learn and embody human excellence, freeing humanity to explore previously unimaginable challenges.

Spencer believes in the power of abundance over scarcity, especially regarding knowledge and expertise. He values rigorous evaluation, data-driven decision-making, and the notion that technology should unlock human potential rather than limit it. He champions transparency, continuous innovation, and collaboration between human intellect and machine learning.

Strong interdisciplinary expertise combining statistics, finance, and computer science, allowing Spencer to approach problems holistically and innovate in AI-driven knowledge management with real-world business acumen.

With a strong focus on innovation and technical depth, he might occasionally under-communicate in simpler terms, risking that his visionary ideas could feel esoteric or overly complex for broader audiences.

To expand his audience on X, Spencer should leverage storytelling to break down his technical innovations into relatable narratives and vivid use cases, combining educational threads with interactive Q&A sessions to engage a wider community beyond AI insiders.

Fun fact: Spencer once speculated and profited from a university president's resignation within minutes of the news breaking — a sharp move blending insight with real-time market intuition, showcasing his blend of finance savvy and rapid data interpretation.

Top tweets of Spencer Mateega

Today, humanity is shackled by scarcity of expertise. When expertise becomes infinitely scalable, humans will be freed to tackle problems we can't even conceive of today. Introducing @AfterQuery. We’re building a world where expertise is abundant. Domain by domain, profession by profession, AfterQuery is crafting datasets that encode excellence into forms that machines can learn. Data is the final frontier.

140k

Introducing UI-Bench by @afterquery. The first and only rigorous eval of vibe coding tools. > 4,000+ blinded pairwise judgments > @orchidsapp, @figma make, and @lovable_dev take the lead > @v0 and @replit ranked dead last > performance gaps = differences in LLM orchestration, prompting, design templates, and post-processing > link to our paper in the comments!

32k

4:29 PM: Penn notifies students of President Liz Magill's resignation. 4:30 PM: @kalshi shows contracts on Magill's resignation trade at 90 cents/dollar (returns 11% on her resignation) so obviously I buy as many as I can. 4:41 PM: NYT reports resignation. Thanks @luanalopeslara

44k

Excited for @AfterQuery’s UI-Bench to be the leading benchmark for UI/web design! @figma make 👀 cc: @amasad, @rauchg, @antonosika

3k

The frontier begets the frontier. I highly recommend reading @jaminball's latest Clouded Judgement article which spells out the AfterQuery thesis (thread)

3k

the industry standard agentic finance benchmark has calculation errors in its own answer key @_valsai's Finance Agent benchmark says US Steel's inventory turnover is 6.49 it's actually 6.55 the Finance Agent benchmark - uses incorrect accounting - has mathematically incorrect formulas - penalizes models for using up-to-date information - contains basic errors in its answers and grading rubrics our finance experts caught these errors in seconds. now they’re building private evals for frontier labs vals ai’s Finance Agent benchmark is littered with errors, but was cited in releases like @AnthropicAI's Claude for Financial Services the leading labs want to get better at “economically valuable tasks” but they’re currently optimizing against suboptimal signals. here’s why this matters →

627

Today, we’re pulling back the curtains. After collecting thousands of original, human-written coding problems, @AfterQuery created internal, contamination-free evals to test LLM code generation. No leaderboard tricks. No test-set leakage. Just raw task execution. Thread 🧵

2k

🇺🇸 249 years ago, America declared that innovation belongs to the bold. Today, we're writing the next chapter—one dataset at a time. At @AfterQuery, we believe AI's future isn't just about algorithms. It's about the human ingenuity that teaches machines to think, reason, and serve humanity better. From our San Francisco headquarters, we're proud to partner with America's leading AI research labs to fuel the intelligence revolution. Our mission is uniquely American: Bringing together the brightest minds from talent hubs like Stanford AI Lab, Berkeley AI Research, Wall Street, and Silicon Valley—united to ensure AI advancement remains in the hands of those who value freedom and human potential. While others talk about the future, we're building it. Happy Independence Day from @AfterQuery! 🦅🎆 Here's to the innovators who refuse to accept limits. Here's to the American dream.

1k

Most engaged tweets of Spencer Mateega

Today, humanity is shackled by scarcity of expertise. When expertise becomes infinitely scalable, humans will be freed to tackle problems we can't even conceive of today. Introducing @AfterQuery. We’re building a world where expertise is abundant. Domain by domain, profession by profession, AfterQuery is crafting datasets that encode excellence into forms that machines can learn. Data is the final frontier.

140k

Introducing UI-Bench by @afterquery. The first and only rigorous eval of vibe coding tools. > 4,000+ blinded pairwise judgments > @orchidsapp, @figma make, and @lovable_dev take the lead > @v0 and @replit ranked dead last > performance gaps = differences in LLM orchestration, prompting, design templates, and post-processing > link to our paper in the comments!

32k

4:29 PM: Penn notifies students of President Liz Magill's resignation. 4:30 PM: @kalshi shows contracts on Magill's resignation trade at 90 cents/dollar (returns 11% on her resignation) so obviously I buy as many as I can. 4:41 PM: NYT reports resignation. Thanks @luanalopeslara

44k

the industry standard agentic finance benchmark has calculation errors in its own answer key @_valsai's Finance Agent benchmark says US Steel's inventory turnover is 6.49 it's actually 6.55 the Finance Agent benchmark - uses incorrect accounting - has mathematically incorrect formulas - penalizes models for using up-to-date information - contains basic errors in its answers and grading rubrics our finance experts caught these errors in seconds. now they’re building private evals for frontier labs vals ai’s Finance Agent benchmark is littered with errors, but was cited in releases like @AnthropicAI's Claude for Financial Services the leading labs want to get better at “economically valuable tasks” but they’re currently optimizing against suboptimal signals. here’s why this matters →

627

Excited for @AfterQuery’s UI-Bench to be the leading benchmark for UI/web design! @figma make 👀 cc: @amasad, @rauchg, @antonosika

3k

The frontier begets the frontier. I highly recommend reading @jaminball's latest Clouded Judgement article which spells out the AfterQuery thesis (thread)

3k

Today, we’re pulling back the curtains. After collecting thousands of original, human-written coding problems, @AfterQuery created internal, contamination-free evals to test LLM code generation. No leaderboard tricks. No test-set leakage. Just raw task execution. Thread 🧵

2k
Reposted @AnthropicAI

Today we're releasing Claude Opus 4.1, an upgrade to Claude Opus 4 on agentic tasks, real-world coding, and reasoning. htt…

4M

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