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Steven Heidel @stevenheidel.com · 4d

another successful DevDay in the books. thanks to everyone who attended and also to our incredible events team - it was our biggest one yet!

Steven Heidel @stevenheidel.com · 6d

between the Apps SDK, Codex SDK, and AgentKit - how many startups did OpenAI just create today?

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Steven Heidel @stevenheidel.com · 6d

openai.com/index/introd...

Introducing apps in ChatGPT and the new Apps SDK

A new generation of apps you can chat with and the tools for developers to build them.

openai.com

Steven Heidel @stevenheidel.com · 6d

ChatGPT, the everything app

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Steven Heidel @stevenheidel.com · 6d

it’s difficult to overstate how important Codex has been to our team’s ability to ship new products. for example: the drag and drop agent builder we launched today was built end to end in under 6 weeks, thanks to Codex writing 80% of the PRs

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Steven Heidel @stevenheidel.com · 6d

built on top of MCP! developers.openai.com/apps-sdk

Apps SDK

Learn how to use Apps SDK by OpenAI. Our framework to build apps for ChatGPT.

developers.openai.com

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Steven Heidel @stevenheidel.com · 6d

want more users? how does 800M users sound?
build and distribute your apps within ChatGPT with the new Apps SDK

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Steven Heidel @stevenheidel.com · 6d

Sam’s DevDay keynote starts in 15 minutes! what do you think he’s going to announce? 👀

Steven Heidel @stevenheidel.com · 6d

looking forward to DevDay today! send me a message if you're there and want to meet up - DMs are open

Steven Heidel @stevenheidel.com · 13d

want to sell your products directly to ChatGPT users? try out the new Agentic Commerce Protocol (ACP) developers.openai.com/commerce

Agentic Commerce

Design flows for embedded commerce in ChatGPT.

developers.openai.com

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Steven Heidel @stevenheidel.com · 20d

why we built the Responses API developers.openai.com/blog/respons...

Why we built the Responses API

How the Responses API unlocks persistent reasoning, hosted tools, and multimodal workflows for GPT-5.

developers.openai.com

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Steven Heidel @stevenheidel.com · 20d

just popped a bunch of tylenol so i can understand LLMs better

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Steven Heidel @stevenheidel.com · 22d

bsky.app/profile/just...

Justin Wolfers @justinwolfers.bsky.social · 22d

Critical part of the President's new $100,000 charge for H1-B visas: The Administration can also offer a $100,000 discount to any person, company, or industry that it wants. Replacing rules with arbitrary discretion.

Want visas? You know who to call and who to flatter.

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Steven Heidel @stevenheidel.com · 22d

i was privileged to become american thanks to the h-1b visa. the program has its flaws, but adding a $100k "bribe" (which can be arbitrarily waived if you please the right people) is not the answer

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Steven Heidel @stevenheidel.com · 24d

first they came for the immigrants, then they came for the comedians - but it’s fine since i’m not any of those things

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Steven Heidel @stevenheidel.com · Sep 10

ChatGPT now fully supports MCP tools, including write actions! just turn on the new "developer mode" in the settings

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Steven Heidel @stevenheidel.com · Aug 28

the Realtime API has gained support for MCP, plus a better model, new voices, and SIP phone calling

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Steven Heidel @stevenheidel.com · Aug 21

and it works with deep research models too! platform.openai.com/docs/guides/...

OpenAI Platform

Explore developer resources, tutorials, API docs, and dynamic examples to get the most out of OpenAI's platform.

platform.openai.com

Steven Heidel @stevenheidel.com · Aug 21

🆕 you can now connect Responses API to more sources, like Gmail and Google Calendar!

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Steven Heidel @stevenheidel.com · Aug 7

GPT-5 is here, and it's incredible. try it in ChatGPT and the API today. openai.com/gpt-5/

openai.com

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Steven Heidel @stevenheidel.com · Aug 6

for every step forward the US takes in AI, we take two steps backwards somewhere else. this week it's destroying a perfectly good satellite and canceling funding to one of the most promising technologies for beating cancer

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Steven Heidel @stevenheidel.com · Aug 5

I’m excited to see what developers build with these new models! github.com/openai/gpt-oss

GitHub - openai/gpt-oss: gpt-oss-120b and gpt-oss-20b are two open-weight language models by OpenAI

gpt-oss-120b and gpt-oss-20b are two open-weight language models by OpenAI - openai/gpt-oss

github.com

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Steven Heidel @stevenheidel.com · Aug 5

ensuring that AGI benefits all of humanity requires accepting a simple fact: that not all of humanity will have access to the internet all of the time. that's why local, open source models are so important.

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Steven Heidel @stevenheidel.com · Aug 5

Open AI openai.com/open-models/

Open models by OpenAI

Advanced open-weight reasoning models to customize for any use case and run anywhere.

openai.com

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Steven Heidel @stevenheidel.com · Aug 5

also congrats to my friends at Anthropic on the release of Opus 4.1 today! www.anthropic.com/news/claude-...

Claude Opus 4.1

Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.

www.anthropic.com

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