Artificial Intelligence
OpenAI Dev Day 2025: ChatGPT Apps, Sora 2, AgentKit, API Adds, Codex And More
Updated on Tue, Oct 7, 2025
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On October 6, 2025, artificial intelligence (AI) sector leader OpenAI held its annual conference for developers—OpenAI Dev Day—which included an opening keynote speech from the company’s CEO, Sam Altman.
“It’s the best time in history to be a builder. This year, we introduced the next generation of tools and models to help developers code faster, build agents more reliably, and scale their apps in ChatGPT,” reads the company's Dev Day 2025 page.
Through the conference, OpenAI updated the world about its newest products and latest updates, while also throwing out some noteworthy numbers: 4 million developers have built using OpenAI products, ChatGPT sees more than 800 million weekly users, and 6 billion tokens get processed every minute on the API platform.
One of the highlights of the conference was the introduction of a new generation of apps in ChatGPT, which users can chat with, right inside its flagship chatbot.
“Apps meet you in the chat and adapt to your context to help you create, learn, and do more,” said OpenAI. These apps fit and respond naturally in conversations and can be discovered when ChatGPT suggests one or when a user calls them by name.
The first set of apps, which OpenAI partnered with early on, includes Booking.com, Canva, Coursera, Expedia, Figma, Spotify, and Zillow. They will be available to all logged-in ChatGPT users outside of the EU on Free, Go, Plus and Pro plans. EU users are expected to gain access soon.
“Spotify's vision has always been to be everywhere you are. By bringing Spotify into ChatGPT, we're creating a powerful new way for fans to connect with the artists and creators they love conversationally, whenever inspiration strikes,” said Sten Garmark, SVP, Global Head of Consumer Experience, Spotify.
OpenAI will also integrate 11 more partner apps later in the year, which span AllTrails, DoorDash, Khan Academy, Instacart, Peloton, OpenTable, Target, TheFork, Tripadvisor, Thumbtack, and Uber.
OpenAI also introduced the new Apps SDK (preview), which allows developers to begin building apps in ChatGPT, bringing their apps to over 800 million ChatGPT users at just the right time. This will be released as an open standard built on the Model Context Protocol (MCP).
The company plans to start accepting app submissions for review and publication later this year and will share more details on how developers can monetize their apps.
“Developers can use their own code to define the app’s interface and chat logic, and connect directly with their backend so their existing customers can log in or access premium features,” OpenAI said.
Focusing on developers, OpenAI also launched AgentKit, which is a complete set of tools for developers and enterprises to build, deploy, and optimize agents.
The idea is to cut out the need to juggle fragmented tools that result in “complex orchestration with no versioning, custom connectors, manual eval pipelines, prompt tuning, and weeks of frontend work before launch.”
AgentKit allows developers to design workflows visually and embed agentic UIs faster using tools such as Agent Builder (a visual canvas for creating workflows), Connector Registry (a central management hub connecting data and tools), and ChatKit (to embed customizable chat-based agents). It also comes with guardrails that bring safety screening for inputs and outputs.
OpenAI will also bring expanded evaluation capabilities with new features such as datasets, trace grading, automated prompt optimization, and third-party model support to improve agent performance.
OpenAI brought its Sora 2 and Sora 2 Pro, its newest video generator, to developers for the first time through the Video API. This enables programmatic creation, extension, and remixing of videos through five endpoints, spanning creating videos, getting video status, downloading videos, listing videos, and eleting videos.
Where Sora 2 is designed for speed and flexibility—and serves as the model ideal for the exploration phase—Sora 2 Pro takes longer to render and is more expensive to run but produces higher quality and more polished results.
At the conference, CEO Sam Altman also spoke about OpenAI’s new partnership with toymaker Mattel to test Sora 2.
Altman said, “Mattel has been a great partner working with us to test Sora 2 in the API (application programming interface) and see what they can do to bring product ideas to life more quickly. So, one of their designers can now start with a sketch and then turn these early concepts into something that you can see and share and react to.”
OpenAI also announced the general availability of Codex, with three new features, including a new Slack integration, new admin tools, and Codex SDK.
“Codex is now used by developers all over the world, from startups like Duolingo and Vanta to large enterprises like Cisco and Rakuten. Inside OpenAI, it’s become integral to how we build: nearly all engineers use Codex today, up from just over half in July,” OpenAI said.
As per the company, the daily usage of Codex has grown by over 10x since early August, with GPT-5-Codex becoming one of its fastest-growing models ever.
Ahead of this, the company said GPT-5 pro, which uses more compute to think harder and provide consistently better answers, is available in the Responses API only.
It also released new image and speech-to-speech models that are cheaper than their full-sized counterparts but offer similar quality. gpt-image-1-mini is said to be 80% cheaper, and gpt-realtime-mini is 70% cheaper.
OpenAI has become a name that’s synonymous with AI, despite AI technology being used long before the company came along.
However, it did bring forth the brilliant capabilities of generative artificial intelligence (GenAI), with the launch of ChatGPT in November 2022, which kicked off the AI race—one that saw GPUs become the most critical bit of infrastructure.
This even saw the rise of NVIDIA, which became the first company to reach a $4 trillion market capitalization, an impressive achievement considering it only entered the $1 trillion club in mid-2023. NVIDIA’s GPUs are highly coveted and actively pursued by every company looking to build its own AI systems.
Yet, recently, OpenAI signed a mega deal with NVIDIA competitor AMD to deploy 6 gigawatts of AMD GPU computing power across its next-generation AI infrastructure, which occurred not long after OpenAI welcomed a $100 billion investment from NVIDIA.
Regardless of the irony, OpenAI has been developing, deploying, and updating a wide range of AI products and exploring new markets to enter, which includes buying up startups that can boost such offerings. With a recent share sale, it even managed to hit a valuation of $500 billion, making it the most valuable privately owned company in the world.
Suffice it to say, the company isn’t going to put its foot off the peddle now, and more updates are just around the corner—it’s just a matter of time.
What do you think about OpenAI’s Dev Day 2025 announcements? Which new product are you looking forward to trying out?
Let us know in the comments below!
“It’s the best time in history to be a builder. This year, we introduced the next generation of tools and models to help developers code faster, build agents more reliably, and scale their apps in ChatGPT,” reads the company's Dev Day 2025 page.
Through the conference, OpenAI updated the world about its newest products and latest updates, while also throwing out some noteworthy numbers: 4 million developers have built using OpenAI products, ChatGPT sees more than 800 million weekly users, and 6 billion tokens get processed every minute on the API platform.
One of the highlights of the conference was the introduction of a new generation of apps in ChatGPT, which users can chat with, right inside its flagship chatbot.
Apps In ChatGPT
“Apps meet you in the chat and adapt to your context to help you create, learn, and do more,” said OpenAI. These apps fit and respond naturally in conversations and can be discovered when ChatGPT suggests one or when a user calls them by name.
The first set of apps, which OpenAI partnered with early on, includes Booking.com, Canva, Coursera, Expedia, Figma, Spotify, and Zillow. They will be available to all logged-in ChatGPT users outside of the EU on Free, Go, Plus and Pro plans. EU users are expected to gain access soon.
“Spotify's vision has always been to be everywhere you are. By bringing Spotify into ChatGPT, we're creating a powerful new way for fans to connect with the artists and creators they love conversationally, whenever inspiration strikes,” said Sten Garmark, SVP, Global Head of Consumer Experience, Spotify.
OpenAI will also integrate 11 more partner apps later in the year, which span AllTrails, DoorDash, Khan Academy, Instacart, Peloton, OpenTable, Target, TheFork, Tripadvisor, Thumbtack, and Uber.
OpenAI also introduced the new Apps SDK (preview), which allows developers to begin building apps in ChatGPT, bringing their apps to over 800 million ChatGPT users at just the right time. This will be released as an open standard built on the Model Context Protocol (MCP).
The company plans to start accepting app submissions for review and publication later this year and will share more details on how developers can monetize their apps.
“Developers can use their own code to define the app’s interface and chat logic, and connect directly with their backend so their existing customers can log in or access premium features,” OpenAI said.
OpenAI’s AgentKit
Focusing on developers, OpenAI also launched AgentKit, which is a complete set of tools for developers and enterprises to build, deploy, and optimize agents.
The idea is to cut out the need to juggle fragmented tools that result in “complex orchestration with no versioning, custom connectors, manual eval pipelines, prompt tuning, and weeks of frontend work before launch.”
AgentKit allows developers to design workflows visually and embed agentic UIs faster using tools such as Agent Builder (a visual canvas for creating workflows), Connector Registry (a central management hub connecting data and tools), and ChatKit (to embed customizable chat-based agents). It also comes with guardrails that bring safety screening for inputs and outputs.
OpenAI will also bring expanded evaluation capabilities with new features such as datasets, trace grading, automated prompt optimization, and third-party model support to improve agent performance.
Sora In The API
OpenAI brought its Sora 2 and Sora 2 Pro, its newest video generator, to developers for the first time through the Video API. This enables programmatic creation, extension, and remixing of videos through five endpoints, spanning creating videos, getting video status, downloading videos, listing videos, and eleting videos.
Where Sora 2 is designed for speed and flexibility—and serves as the model ideal for the exploration phase—Sora 2 Pro takes longer to render and is more expensive to run but produces higher quality and more polished results.
At the conference, CEO Sam Altman also spoke about OpenAI’s new partnership with toymaker Mattel to test Sora 2.
Altman said, “Mattel has been a great partner working with us to test Sora 2 in the API (application programming interface) and see what they can do to bring product ideas to life more quickly. So, one of their designers can now start with a sketch and then turn these early concepts into something that you can see and share and react to.”
Codex
OpenAI also announced the general availability of Codex, with three new features, including a new Slack integration, new admin tools, and Codex SDK.
“Codex is now used by developers all over the world, from startups like Duolingo and Vanta to large enterprises like Cisco and Rakuten. Inside OpenAI, it’s become integral to how we build: nearly all engineers use Codex today, up from just over half in July,” OpenAI said.
As per the company, the daily usage of Codex has grown by over 10x since early August, with GPT-5-Codex becoming one of its fastest-growing models ever.
More From OpenAI’s Dev Day
Ahead of this, the company said GPT-5 pro, which uses more compute to think harder and provide consistently better answers, is available in the Responses API only.
It also released new image and speech-to-speech models that are cheaper than their full-sized counterparts but offer similar quality. gpt-image-1-mini is said to be 80% cheaper, and gpt-realtime-mini is 70% cheaper.
OpenAI’s Growth
OpenAI has become a name that’s synonymous with AI, despite AI technology being used long before the company came along.
However, it did bring forth the brilliant capabilities of generative artificial intelligence (GenAI), with the launch of ChatGPT in November 2022, which kicked off the AI race—one that saw GPUs become the most critical bit of infrastructure.
This even saw the rise of NVIDIA, which became the first company to reach a $4 trillion market capitalization, an impressive achievement considering it only entered the $1 trillion club in mid-2023. NVIDIA’s GPUs are highly coveted and actively pursued by every company looking to build its own AI systems.
Yet, recently, OpenAI signed a mega deal with NVIDIA competitor AMD to deploy 6 gigawatts of AMD GPU computing power across its next-generation AI infrastructure, which occurred not long after OpenAI welcomed a $100 billion investment from NVIDIA.
Regardless of the irony, OpenAI has been developing, deploying, and updating a wide range of AI products and exploring new markets to enter, which includes buying up startups that can boost such offerings. With a recent share sale, it even managed to hit a valuation of $500 billion, making it the most valuable privately owned company in the world.
Suffice it to say, the company isn’t going to put its foot off the peddle now, and more updates are just around the corner—it’s just a matter of time.
What do you think about OpenAI’s Dev Day 2025 announcements? Which new product are you looking forward to trying out?
Let us know in the comments below!
First published on Tue, Oct 7, 2025
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