Today, we share a breakthrough on the planar unit distance problem, a famous open question first posed by Paul Erdős in 1946. For nearly 80 years, mathematicians believed the best possible solutions looked roughly like square grids. An OpenAI model has now disproved that belief, discovering an entirely new family of constructions that performs better. This marks the first time AI has autonomously solved a prominent open problem central to a field of mathematics.

A preview for Pro users: a new personal finance experience in ChatGPT. Pro users in the U.S. can securely connect financial accounts, see where their money is going, and ask questions based on the information they choose to connect. Your full financial picture, now in ChatGPT.

We started Hiro with the vision of building an AI personal CFO. Joining @OpenAI gives us the chance to pursue that vision at a much greater scale. Important dates: - Today: Hiro is no longer accepting new signups - April 20, 2026: The product will stop working, but data export will remain available - May 13, 2026: All user data will be deleted from our servers Existing users can export their data from the Settings page in Hiro’s web app. Thank you for trusting us with your time, feedback, and finances. Building for you was a privilege. We hope to serve you again through what we build next at OpenAI.

We started Hiro with the vision of building an AI personal CFO. Joining @OpenAI gives us the chance to pursue that vision at a much greater scale. Important dates: - Today: Hiro is no longer accepting new signups - April 20, 2026: The product will stop working, but data export will remain available - May 13, 2026: All user data will be deleted from our servers Existing users can export their data from the Settings page in Hiro’s web app. Thank you for trusting us with your time, feedback, and finances. Building for you was a privilege. We hope to serve you again through what we build next at OpenAI.

🚨 CRITICAL: Active supply chain attack on axios -- one of npm's most depended-on packages. The latest axios@1.14.1 now pulls in plain-crypto-js@4.2.1, a package that did not exist before today. This is a live compromise. This is textbook supply chain installer malware. axios has 100M weekly downloads. Every npm install pulling the latest version is potentially compromised right now. Socket AI analysis confirms this is malware. plain-crypto-js is an obfuscated dropper/loader that: • Deobfuscates embedded payloads and operational strings at runtime • Dynamically loads fs, os, and execSync to evade static analysis • Executes decoded shell commands • Stages and copies payload files into OS temp and Windows ProgramData directories • Deletes and renames artifacts post-execution to destroy forensic evidence If you use axios, pin your version immediately and audit your lockfiles. Do not upgrade.

Today we're launching one of our most requested features: Portfolio Analyst. Aggregate all your investment accounts into one view and test alternative portfolios side-by-side. All supported by Hiro's AI that analyzes, explains, and recommends changes.

Today we're launching Hiro's MCP server. Now you can take all your financial data with you, wherever you agent.

just met a cute girl at the wedding i’m at like unreal. face card so crazy my frontal lobe clocked out. i’m talking generational. if symmetry was a startup she just closed series b. we’re vibing. she’s laughing. eye contact locked. i’m farming aura like it’s a full-time job. then coding comes up. she goes “yeah i code” my soul did a hard restart i’m like oh word “what do you build?” she says “mostly vibe-coding rn” and that’s where a normal man would say “that’s fire” and get her number but unfortunately i was built in a lab i go: “ok define vibe-coding” “claude code or codex” “cursor agent mode or raw dogging prompts” “you got git or just vibes” “tests?” “types?” “deploy?” “rollback?” “you read diffs or click accept like a casino addict” she starts laughing like i’m joking i was entering forensic mode. she says “i just use chatgpt and claude and keep asking until it kinda works” i say “works where” she says “like… on my laptop” i say “so localhost cosplay” bro. and i swear to God the violinist in the corner sounded like a system alarm the vibe died instantly DIED flatline. kernel panic. social segfault. full emotional 500 in prod. i try one last save. i go “ok but do you at least push to github” she says “sometimes, i mostly keep stuff on desktop folders” DESKTOP FOLDERS i started dissociating. i could see my ancestors. i could hear linus torvalds screaming in the distance. her friend walks over like “omg are y’all talking tech” and i accidentally say “she said she’s a developer but her stack is claude code, codex, and divine intervention” she goes “wait no i made a website” i said “a figma screenshot with a typeform link is not a website, it is a cry for help” SILENCE. like biblical silence. they walked away. she did not look back. my friend comes over like “bro she was INTO you what happened” i said “she called herself a coder and then described generating a landing page and praying over it” he said “so?” SO??? i’m supposed to build a future with someone whose incident response plan is ‘refresh and re-prompt’??? she had a heavenly face card but an apocalyptic workflow zero tests zero repos zero shame infinite vibes could’ve had her number but she now knows i respect source control and honestly that’s worth more

the four golden words: use red green tdd