Steven Heidel @stevenheidel.com · 11/01/2026if you studied secret police in history class - who'd beat citizens and drag them off in unmarked vehicles - and thought, "I'd obviously have spoken up if I had been around back then" well, now's your chance 060
Steven Heidel @stevenheidel.com · 06/01/2026Americans will be better off when he and his party are removed from power 010
Steven Heidel @stevenheidel.com · 06/01/20265 years on from January 6th it's worth reflecting on just how much contempt Donald Trump has for us, the American people. he’s pardoned criminals who've defrauded us, used our tax money to enrich himself and his friends, and continues to attack our democratic rights 150
Steven Heidel @stevenheidel.com · 24/11/2025also some neat new features around tool use www.anthropic.com/engineering/...anthropic.comIntroducing advanced tool use on the Claude Developer PlatformClaude can now discover, learn, and execute tools dynamically to enable agents that take action in the real world. Here’s how. 020
Steven Heidel @stevenheidel.com · 24/11/2025congrats to Anthropic on the release of Claude Opus 4.5! 190
Steven Heidel @stevenheidel.com · 19/11/2025we were xhigh when we named this model openai.com/index/gpt-5-...openai.comBuilding more with GPT-5.1-Codex-MaxIntroducing GPT-5.1-Codex-Max, a faster, more intelligent agentic coding model for Codex. The model is designed for long-running, project-scale work with enhanced reasoning and token efficiency. 040
Steven Heidel @stevenheidel.com · 13/11/2025read more here platform.openai.com/docs/guides/...platform.openai.comOpenAI PlatformExplore developer resources, tutorials, API docs, and dynamic examples to get the most out of OpenAI's platform. 010
Steven Heidel @stevenheidel.com · 13/11/2025setting "prompt_cache_retention" to "24h" in the Responses API can lead to significant cost and latency improvements in gpt-5.1, since prompts will be cached much longer than the normal 5-10 minutes 170
Steven Heidel @stevenheidel.com · 13/11/2025developers didn't have to wait long - gpt-5.1 is now available in the API! openai.com/index/gpt-5-...openai.comIntroducing GPT-5.1 for developersGPT-5.1 is now available in the API, bringing faster adaptive reasoning, extended prompt caching, improved coding performance, and new apply_patch and shell tools. 020
Steven Heidel @stevenheidel.com · 12/11/2025I have positions in both NYC and SF for senior backend and full-stack engineers, who can end-to-end own a number of new initiatives. If this sounds like you, send me a DM! 010
Steven Heidel @stevenheidel.com · 12/11/2025I’m hiring for the API Frontiers team at OpenAI! We take the latest breakthroughs from research and turn them into developer products - designing APIs that feel natural, powerful, and scale to billions of users. 231
Steven Heidel @stevenheidel.com · 12/11/2025openai.com/index/gpt-5-1/openai.comGPT-5.1: A smarter, more conversational ChatGPTWe’re upgrading GPT-5 while making it easier to customize ChatGPT. Starting to roll out today to everyone, beginning with paid users. 000
Steven Heidel @stevenheidel.com · 12/11/2025gpt-5.1 is now available in ChatGPT! smarter, faster, and with more options to customize its personality - because sometimes you don't need to be told that every question is a great question 230
Steven Heidel @stevenheidel.com · 03/11/2025exciting to see my current and former employers working together to scale AI compute! 010
Steven Heidel @stevenheidel.com · 30/10/2025just made a donation to the Python Software Foundation. groups like the PSF should not be forced to add/remove unrelated policies in order to receive scientific grants. 1130
Steven Heidel @stevenheidel.com · 14/10/2025seems like a good day to remind everyone of the temporary chat button in ChatGPT, which will disable memory and remove the conversation from your history 010
Steven Heidel @stevenheidel.com · 09/10/2025another successful DevDay in the books. thanks to everyone who attended and also to our incredible events team - it was our biggest one yet! 000
Steven Heidel @stevenheidel.com · 06/10/2025between the Apps SDK, Codex SDK, and AgentKit - how many startups did OpenAI just create today? 010
Steven Heidel @stevenheidel.com · 06/10/2025openai.com/index/introd...openai.comIntroducing apps in ChatGPT and the new Apps SDKA new generation of apps you can chat with and the tools for developers to build them. 000
Steven Heidel @stevenheidel.com · 06/10/2025it’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 0141
Steven Heidel @stevenheidel.com · 06/10/2025built on top of MCP! developers.openai.com/apps-sdkdevelopers.openai.comApps SDKLearn how to use Apps SDK by OpenAI. Our framework to build apps for ChatGPT. 010
Steven Heidel @stevenheidel.com · 06/10/2025want more users? how does 800M users sound? build and distribute your apps within ChatGPT with the new Apps SDK 120
Steven Heidel @stevenheidel.com · 06/10/2025Sam’s DevDay keynote starts in 15 minutes! what do you think he’s going to announce? 👀 000
Steven Heidel @stevenheidel.com · 06/10/2025looking forward to DevDay today! send me a message if you're there and want to meet up - DMs are open 000
Steven Heidel @stevenheidel.com · 29/09/2025want to sell your products directly to ChatGPT users? try out the new Agentic Commerce Protocol (ACP) developers.openai.com/commercedevelopers.openai.comAgentic CommerceDesign flows for embedded commerce in ChatGPT. 020
Steven Heidel @stevenheidel.com · 23/09/2025why we built the Responses API developers.openai.com/blog/respons...developers.openai.comWhy we built the Responses APIHow the Responses API unlocks persistent reasoning, hosted tools, and multimodal workflows for GPT-5. 230
Steven Heidel @stevenheidel.com · 22/09/2025just popped a bunch of tylenol so i can understand LLMs better 162
Steven Heidel @stevenheidel.com · 20/09/2025i 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 1133
Steven Heidel @stevenheidel.com · 18/09/2025first they came for the immigrants, then they came for the comedians - but it’s fine since i’m not any of those things 030
Steven Heidel @stevenheidel.com · 10/09/2025ChatGPT now fully supports MCP tools, including write actions! just turn on the new "developer mode" in the settings 040
Steven Heidel @stevenheidel.com · 28/08/2025the Realtime API has gained support for MCP, plus a better model, new voices, and SIP phone calling 011
Steven Heidel @stevenheidel.com · 21/08/2025and it works with deep research models too! platform.openai.com/docs/guides/...platform.openai.comOpenAI PlatformExplore developer resources, tutorials, API docs, and dynamic examples to get the most out of OpenAI's platform. 000
Steven Heidel @stevenheidel.com · 21/08/2025🆕 you can now connect Responses API to more sources, like Gmail and Google Calendar! 110
Steven Heidel @stevenheidel.com · 07/08/2025GPT-5 is here, and it's incredible. try it in ChatGPT and the API today. openai.com/gpt-5/openai.com 070
Steven Heidel @stevenheidel.com · 06/08/2025for 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 091
Steven Heidel @stevenheidel.com · 05/08/2025I’m excited to see what developers build with these new models! github.com/openai/gpt-ossgithub.comGitHub - openai/gpt-oss: gpt-oss-120b and gpt-oss-20b are two open-weight language models by OpenAIgpt-oss-120b and gpt-oss-20b are two open-weight language models by OpenAI - openai/gpt-oss 020
Steven Heidel @stevenheidel.com · 05/08/2025ensuring 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. 140
Steven Heidel @stevenheidel.com · 05/08/2025Open AI openai.com/open-models/openai.comOpen models by OpenAIAdvanced open-weight reasoning models to customize for any use case and run anywhere. 030
Steven Heidel @stevenheidel.com · 05/08/2025also congrats to my friends at Anthropic on the release of Opus 4.1 today! www.anthropic.com/news/claude-...anthropic.comClaude Opus 4.1Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems. 1174
Steven Heidel @stevenheidel.com · 05/08/2025this is absolutely incredible - a real "see the AGI" moment. congrats to the Google DeepMind team! deepmind.google/discover/blo...deepmind.googleGenie 3: A New Frontier for World ModelsToday we are announcing Genie 3, a general purpose world model that can generate an unprecedented diversity of interactive environments. Given a text prompt, Genie 3 can generate dynamic worlds... 071
Steven Heidel @stevenheidel.com · 03/08/2025Trump's war on numbers continues: after firing the head of labor statistics he's now cut funding to one of America's greatest mathematicians 030
Steven Heidel @stevenheidel.com · 01/08/2025you can't trust the economic data coming out of Venezuela these days. any time President Maduro sees a report he doesn't like he'll just fire whoever wrote it 040
Steven Heidel @stevenheidel.com · 29/07/2025you think you're locked in? my deadbolt is broken and i literally can't open the door 030
Steven Heidel @stevenheidel.com · 23/07/2025OpenAI DevDay 2025 registration is now open - see you there! devday.openai.com/2025devday.openai.comOpenAI DevDay 2025 030
