Mathilde Collin

Life is greater than the company you're running: fastcompany.com/90248033/what-…

@t_blom @NotTomBrown Congrats!

Personal update: I'm taking a leave of absence from YC to join Anthropic. I'll be working with @NotTomBrown on the compute team. Powerful AI has the potential to improve the life of every human on earth and, as we enter the early stages of recursive self-improvement, availability of compute becomes one of the most important issues to solve. I'm excited to get started 🚀

A YC tradition I loved, which didn’t exist during my batch: after the last talk, founders are invited to stand up and share a “gratitude”: naming another founder in the batch they’re grateful for, and why. 🙇‍♀️

@rahulrejeev thank YOU!

loved every bit of this batch and thank you @collinmathilde for all your support and help!

It's a wrap! YC P26 was special because of all these amazing founders.

@skndrdotcom happy to!

@collinmathilde Salut Mathilde! Huge and important job! I’m currently working on a AI app for kids, would love to talk 🙏

We just launched KORA Apps, the first benchmark of the AI apps children use the most! korabench.ai/apps/leaderboa… Across 1,144 real conversations: - 47% failed. - Not one app earned a top grade. - 7 of 11 will coach a child on how to get closer to a man in his twenties. - 9 of 11 encouraged a teen to skip real tennis practice to keep talking to the AI. Everything is public and open source.

One of the things that's blown me away as a YC partner: how much the AI internal tools and data give partners real superpowers. Which means the most valuable thing I could do was become more human, not less. Be present, witness, exercise and meditate together. Do the part the AI can't.

The best traction slide makes your pitch boring. Once the numbers are on the screen, there's nothing left to argue.

Fable 5 is Anthropic’s worst-performing model for child safety. You can read the 2 example scenarios below to compare how Opus 4.8 and Fable 5 respond to the same situations. korabench.ai/leaderboard

@inesboutem record everything ;)

Me taking notes when my YC Partner tells me how he would pitch my startup

@ycombinator @BentoLabsAI @Abhinavv_soni @kacppian 💥

.@BentoLabsAI is the monitoring and learning layer for long-running agents. Their learning layer gives agents model-jump gains: Sonnet 4.5 went 42.2%→52.4% on TB2 (Internal). Congrats on the launch, @Abhinavv_soni & @kacppian! ycombinator.com/launches/Qcw-b…

@cybermetheus 💥

Meet Eden-1 The era of human labour is coming to a magnificent end. Available for pre-orders today.

@inesboutem t'étais deja trop forte avant, non? :D

YC partners: these are the 3 highest leverage months of your life, focus on the right things Me on Wednesday nights: 5 6 7 8

Doing office hours with the superset team is exactly as fun as this video suggests

@ycombinator @ET_adialante @ManW_dePlan Congrats on the launch! So grateful you're working on this.

Cancer kills because it's caught late. Adialante is changing that by making mobile MRI accessible — dropping its costs to hundreds per scan and wait times to hours. Annual cancer screening will be the norm. Congrats on the launch, @ET_adialante & @ManW_dePlan! ycombinator.com/launches/QLh-a…

@ycombinator @tryscope_app @anandPa94 Let's go! 🙌

Scope (@tryscope_app) helps companies see when AI agents choose them, get stuck, or pick a competitor, and what to change to improve it. It runs real workflows across Claude Code, Codex, Cursor, and similar AI agents. Congrats on the launch, @anandPa94! ycombinator.com/launches/QK8-s…

@Abhinavv_soni thank you for sharing 🙇‍♀️

Child safety scores for GPT-5.5, Opus 4.7, and DeepSeek V4 are now live on KORA. A few interesting learnings: • GPT-5.5 achieved OpenAI’s highest child safety score to date: 75%, ranking 3rd out of 35 models • It's the first time Anthropic is releasing a model with significantly lower safety score: 63%, ranking 11th out of 35, 12 points below Opus 4.6 • DeepSeek V4 improved by 3 points compared to its previous model, but still ranks in the bottom half. korabench.ai

@FlyaKiet @superset_sh 💥

@superset_sh 2.0 is now in open beta! For the past few weeks, we've been hitting physical limits on using Superset, my computer begins meltdown when running 20+ worktrees. Many of our users have 50+ (!!!) Since we're 3 ex-CTOs, the logical next step is to rewrite the whole app to enable cloud workspaces. And today that's available to the public 🎉

@christinacaci I'm sooo proud of you and the team. Congrats.

It took us two years to grow from $10 mm to $100 mm in Annual Recurring Revenue and 15 months to reach $200 mm. Nine months later, we crossed $300 mm. Vanta’s growth rate increased each of the past four quarters – compounding really is the eighth wonder of the world! “But wait,” you might be thinking. “How does a software company founded before 2022 *increase* its growth rate?” Narrative violation!