Upcoming Apr 23, 2026
Codex meetup
Paris, France
Apr 23, 2026
Hosted by OpenAI x Neon Noir
Community
We have a range of programs and initiatives for builders, organizers, maintainers, and student leaders who want to be part of the OpenAI community.
Join a meetup
Meet builders in person, swap workflows, and learn how others are shipping with Codex.
Upcoming Apr 24, 2026
Community Meetup
Lima, Peru
Apr 24, 2026
Hosted by Railly Hugo
Codex for Students
Verified university students in the United States and Canada can claim $100 in ChatGPT credits to use in Codex.
What builders are sharing
Recent posts from the Codex and the broader OpenAI community.
Bindu Reddy
@bindureddy
Our ops team has switched to GPT 5.4 for ops and coding tasks It’s just way better for ops, SRE and cloud configuration issues Likely because it’s just a lot more aware of these knowledge bases
am.will
@LLMJunky
The Codex app server was such a brilliant stroke of foresight that really doesn't get enough love Not only are you allowed to use your chatgpt account with any harness, but you can build your own apps directly on top of theirs. They just make building on and with codex such a great experience
David Marcus
@davidmarcus
It's wild that every time you run a Codex code review from Claude Code, it finds critical issues. Not 95% of the times, 100%.
Garry Tan
@garrytan
OK Codex is GOAT at finding bugs and finding plan errors
MJ
@mjackson
If you haven't tried Codex yet, you're missing something BIG.
Victor Mota
@vimota
OpenAI got me with the 2x increased usage limits on the Codex desktop app. It's a really nice experience. Super smooth - claude code app is so laggy. And the handoff experience is amazing. > I started a session locally on codex app > had to leave so I handed it off to codex cloud (with 2 attempts) > got back to my computer, compared both attempts, picked the better one, synced it back to my computer > continued to iterate on it locally
Derya Unutmaz, MD
@DeryaTR_
My new Sunday morning routine: 1. Get coffee 2. Check GPT-5.4 projects on the Codex App, continue & start new ones 4. Launch ChatGPT 5.4 Pro for fresh brainstorming sessions 5. Think/learn how to use the 90% of AI capabilities I have yet to explore 6. Drink more coffee
Evan You
@youyuxi
Did a full repo internal / public docs vs. source code alignment check + update - GPT 5.4 did a significantly better job than Opus 4.6. Note this is not a coding task but more like research / documentation. Same prompt but GPT 5.4's proposed revisions captured my intent much...
ashe
@ashebytes
given the interest, I productized my video hub! - have 1 place for video drafts + X, Youtube, tiktok vids - use the studio to comment + collab with others - get transcripts + add API keys for autosyncs/agent chat made with codex 5.3 🖤 linked below
John Jung
@johnjjung
Codex 5.3 xhigh spark has been phenomenal - you’re able to stay in a state of flow building. The focus and power of hitting problem after problem is incredible.
Mitchell Hashimoto
@mitchellh
Ahhhh, Codex 5.3 (xhigh) with a vague prompt just solved a bug that I and others have been struggling to fix for over 6 months. Other reasoning levels with Codex failed, Opus 4.6 failed. Cost $4.14 and 45 minutes.
Theo - t3.gg
@theo
Almost every verifiable problem I've been sent so far has been solved by 5.3 Codex. Please make sure 5.3 Codex can't solve your problem before you submit it to me. I'm a youtuber not a prompt box.
Mitchell Hashimoto
@mitchellh
I know this is pretty well established at this point, but Codex 5.3 is a much more effective model than Opus 4.6. I went back and forth on both for a bit, but haven't touched Opus at all now for a full week. First model to get me off of Opus... ever. Good job Codex team.
Mariusz Kurman
@mkurman88
Those who wrote "Try Codex" when I was hyping CC were right. Codex 5.3 is another level. It delivers so much with such high quality - I'm literally shocked. 5.2 was a mess; 5.3 is in another league.
Dennis Hannusch
@DennisHannusch
I started daily driving Codex with gpt-5.3-codex this week.. it's reaaally good. I've gotten used to complex workflows and context management, but Codex just does what I ask. I keep expecting quality to drop deep into a session, but it doesn't. @OpenAIDevs ya'll cooked!
ORO AI ✈️ ETHDenver
@getoro_xyz
OpenAI rolls out GPT-5.3-Codex with faster AI coding and measurable efficiency gains. Look at the chart. That Kurzweil Curve doesn't happen by accident. It's the result of a new data diet plan, shifting toward real-world and private workflow data.
Christopher Ehrlich
@ccccjjjjeeee
It actually worked! For the past couple of days I've been throwing 5.3-codex at the C codebase for SimCity (1989) to port it to TypeScript. Not reading any code, very little steering. Today I have SimCity running in the browser. I can't believe this new world we live in.
Dan Shipper 📧
@danshipper
BREAKING: At the Super Bowl halftime show, Bad Bunny says he prefers Opus 4.6 for vibe coding but turns to 5.3 Codex for gnarly engineering problems. "Opus pa'' vibear, Codex pa'' lo heavy" - he said
Guillermo Rauch
@rauchg
🆕 GPT 5.3 Codex (xhigh) achieves 90% on Next.js evals out of the box, "frame-mogging" the competition so to speak:
Angel ❄️
@Angaisb_
GPT-5.3 Codex is actually pretty insane with Three.js This Minecraft clone works smoothly and it didn't take too long to make I also tried Opus 4.6, but for some reason it got stuck
Angel ❄️
@Angaisb_
GPT-5.3-Codex with image gen skill (NBP) I'm loving this model so much. This is one-shot
Video
Flavio Adamo
@flavioAd
Codex app is the most 'non-native' app that somehow feels more native than native apps
Pallav Agarwal
@pallavmac
Ok the new Codex app is incredible. You can build and run an Xcode project from Codex directly so you can vibecode iOS apps without opening Xcode!
Paul Solt
@PaulSolt
The Codex app feels like the missing IDE layer for the Codex CLI. One-click to open Xcode, run iOS/macOS apps, review diffs, and manage agents. Hard to go back after this.
Kristen Anderson
@FintechKristen
Because codex is the best for development. Everyone knows this. We aren’t using the other coding tools anymore.
Nate Berkopec
@nateberkopec
I have not seen a better code review agent that Codex 5.2 xhigh /review.
Anthony
@kr0der
Codex v0.91.0 has plan mode, and it's really thorough. this one plan took 27% of its context. if you've used Codex you know that 27% is a lot which means it's thoroughly searching before creating plans - no rushing/taking shortcuts. try it out by adding 'collaboration_modes =…
Rudrank Riyam
@rudrank
I spent 3 hours debugging and running all kinds of tests with Opus 4.5 for the discrepancy between CLI vs iOS app embeddings and the retrieval 5.2 Codex xHigh did "thinking" for like 20 minutes and casually one-shot it
Thomas Ricouard
@Dimillian
Yes. At this point, I don't care about speed anymore. Speed is solved by running multiple tasks in parallel. What I want is an agent that can think out of the box like a human, and Codex does just that.
Rudrank Riyam
@rudrank
Codex models is something you can just "trust" more than others I was in car and saw an issue created, and I let a cloud agent work on it for ~17 minutes
Henry
@henrytdowling
Codex is *really good* for coding, one day people will realize
Gavin Nelson
@Gavmn
Favorite recent use of Codex: - pull data from my Apple Music library with a two decade old mess of genre metadata - use MusicKit to pull in proper Apple Music genre metadata - write an Apple Script to update genres with the data from Apple's catalog 💆🏻♂️
Xeophon
@xeophon
Longest Codex run achieved with 8 hours 👀
Peter Steinberger 🦞
@steipete
codex is so good. point at messy PR, sizzles out the 3 fixes out of a big commit, cleanly separates it. done. also idk why it always says full gate but i fully adopted this.
Ian Nuttall
@iannuttall
One thing I have noticed with Codex CLI and 5.2 Codex high model recently I never worry about the context window or compaction any more It just does it, really fast, and the agent carries on like nothing happened, no loss in quality
Aaron Francis
@aarondfrancis
Codex just spent like 6 hours debugging CI while I played outside with my kids
AK
@ak_cozmo
codex hitting that inflection point where it's better at remembering API docs than i am. the shift from "AI suggests code" to "AI owns the implementation layer" is wild most underrated change: junior devs can now ship senior-level infra. distribution of execution ability is…
Numman Ali
@nummanali
Bloody hell, I'll say this GPT 5.2 Codex Extra High is a methodical beast It's updating the OpenCode OpenAI Codex OAuth plugin Literally not leaving any stone unturned This is the first model that feels like it's building for itself ie leaving the door open for future work
Bindu Reddy
@bindureddy
Our ops team has switched to GPT 5.4 for ops and coding tasks It’s just way better for ops, SRE and cloud configuration issues Likely because it’s just a lot more aware of these knowledge bases
David Marcus
@davidmarcus
It's wild that every time you run a Codex code review from Claude Code, it finds critical issues. Not 95% of the times, 100%.
MJ
@mjackson
If you haven't tried Codex yet, you're missing something BIG.
Derya Unutmaz, MD
@DeryaTR_
My new Sunday morning routine: 1. Get coffee 2. Check GPT-5.4 projects on the Codex App, continue & start new ones 4. Launch ChatGPT 5.4 Pro for fresh brainstorming sessions 5. Think/learn how to use the 90% of AI capabilities I have yet to explore 6. Drink more coffee
ashe
@ashebytes
given the interest, I productized my video hub! - have 1 place for video drafts + X, Youtube, tiktok vids - use the studio to comment + collab with others - get transcripts + add API keys for autosyncs/agent chat made with codex 5.3 🖤 linked below
Mitchell Hashimoto
@mitchellh
Ahhhh, Codex 5.3 (xhigh) with a vague prompt just solved a bug that I and others have been struggling to fix for over 6 months. Other reasoning levels with Codex failed, Opus 4.6 failed. Cost $4.14 and 45 minutes.
Mitchell Hashimoto
@mitchellh
I know this is pretty well established at this point, but Codex 5.3 is a much more effective model than Opus 4.6. I went back and forth on both for a bit, but haven't touched Opus at all now for a full week. First model to get me off of Opus... ever. Good job Codex team.
Dennis Hannusch
@DennisHannusch
I started daily driving Codex with gpt-5.3-codex this week.. it's reaaally good. I've gotten used to complex workflows and context management, but Codex just does what I ask. I keep expecting quality to drop deep into a session, but it doesn't. @OpenAIDevs ya'll cooked!
Christopher Ehrlich
@ccccjjjjeeee
It actually worked! For the past couple of days I've been throwing 5.3-codex at the C codebase for SimCity (1989) to port it to TypeScript. Not reading any code, very little steering. Today I have SimCity running in the browser. I can't believe this new world we live in.
Guillermo Rauch
@rauchg
🆕 GPT 5.3 Codex (xhigh) achieves 90% on Next.js evals out of the box, "frame-mogging" the competition so to speak:
Angel ❄️
@Angaisb_
GPT-5.3-Codex with image gen skill (NBP) I'm loving this model so much. This is one-shot
Video
Pallav Agarwal
@pallavmac
Ok the new Codex app is incredible. You can build and run an Xcode project from Codex directly so you can vibecode iOS apps without opening Xcode!
Kristen Anderson
@FintechKristen
Because codex is the best for development. Everyone knows this. We aren’t using the other coding tools anymore.
Anthony
@kr0der
Codex v0.91.0 has plan mode, and it's really thorough. this one plan took 27% of its context. if you've used Codex you know that 27% is a lot which means it's thoroughly searching before creating plans - no rushing/taking shortcuts. try it out by adding 'collaboration_modes =…
Thomas Ricouard
@Dimillian
Yes. At this point, I don't care about speed anymore. Speed is solved by running multiple tasks in parallel. What I want is an agent that can think out of the box like a human, and Codex does just that.
Henry
@henrytdowling
Codex is *really good* for coding, one day people will realize
Xeophon
@xeophon
Longest Codex run achieved with 8 hours 👀
Ian Nuttall
@iannuttall
One thing I have noticed with Codex CLI and 5.2 Codex high model recently I never worry about the context window or compaction any more It just does it, really fast, and the agent carries on like nothing happened, no loss in quality
AK
@ak_cozmo
codex hitting that inflection point where it's better at remembering API docs than i am. the shift from "AI suggests code" to "AI owns the implementation layer" is wild most underrated change: junior devs can now ship senior-level infra. distribution of execution ability is…
am.will
@LLMJunky
The Codex app server was such a brilliant stroke of foresight that really doesn't get enough love Not only are you allowed to use your chatgpt account with any harness, but you can build your own apps directly on top of theirs. They just make building on and with codex such a great experience
Garry Tan
@garrytan
OK Codex is GOAT at finding bugs and finding plan errors
Victor Mota
@vimota
OpenAI got me with the 2x increased usage limits on the Codex desktop app. It's a really nice experience. Super smooth - claude code app is so laggy. And the handoff experience is amazing. > I started a session locally on codex app > had to leave so I handed it off to codex cloud (with 2 attempts) > got back to my computer, compared both attempts, picked the better one, synced it back to my computer > continued to iterate on it locally
Evan You
@youyuxi
Did a full repo internal / public docs vs. source code alignment check + update - GPT 5.4 did a significantly better job than Opus 4.6. Note this is not a coding task but more like research / documentation. Same prompt but GPT 5.4's proposed revisions captured my intent much...
John Jung
@johnjjung
Codex 5.3 xhigh spark has been phenomenal - you’re able to stay in a state of flow building. The focus and power of hitting problem after problem is incredible.
Theo - t3.gg
@theo
Almost every verifiable problem I've been sent so far has been solved by 5.3 Codex. Please make sure 5.3 Codex can't solve your problem before you submit it to me. I'm a youtuber not a prompt box.
Mariusz Kurman
@mkurman88
Those who wrote "Try Codex" when I was hyping CC were right. Codex 5.3 is another level. It delivers so much with such high quality - I'm literally shocked. 5.2 was a mess; 5.3 is in another league.
ORO AI ✈️ ETHDenver
@getoro_xyz
OpenAI rolls out GPT-5.3-Codex with faster AI coding and measurable efficiency gains. Look at the chart. That Kurzweil Curve doesn't happen by accident. It's the result of a new data diet plan, shifting toward real-world and private workflow data.
Dan Shipper 📧
@danshipper
BREAKING: At the Super Bowl halftime show, Bad Bunny says he prefers Opus 4.6 for vibe coding but turns to 5.3 Codex for gnarly engineering problems. "Opus pa'' vibear, Codex pa'' lo heavy" - he said
Angel ❄️
@Angaisb_
GPT-5.3 Codex is actually pretty insane with Three.js This Minecraft clone works smoothly and it didn't take too long to make I also tried Opus 4.6, but for some reason it got stuck
Flavio Adamo
@flavioAd
Codex app is the most 'non-native' app that somehow feels more native than native apps
Paul Solt
@PaulSolt
The Codex app feels like the missing IDE layer for the Codex CLI. One-click to open Xcode, run iOS/macOS apps, review diffs, and manage agents. Hard to go back after this.
Nate Berkopec
@nateberkopec
I have not seen a better code review agent that Codex 5.2 xhigh /review.
Rudrank Riyam
@rudrank
I spent 3 hours debugging and running all kinds of tests with Opus 4.5 for the discrepancy between CLI vs iOS app embeddings and the retrieval 5.2 Codex xHigh did "thinking" for like 20 minutes and casually one-shot it
Rudrank Riyam
@rudrank
Codex models is something you can just "trust" more than others I was in car and saw an issue created, and I let a cloud agent work on it for ~17 minutes
Gavin Nelson
@Gavmn
Favorite recent use of Codex: - pull data from my Apple Music library with a two decade old mess of genre metadata - use MusicKit to pull in proper Apple Music genre metadata - write an Apple Script to update genres with the data from Apple's catalog 💆🏻♂️
Peter Steinberger 🦞
@steipete
codex is so good. point at messy PR, sizzles out the 3 fixes out of a big commit, cleanly separates it. done. also idk why it always says full gate but i fully adopted this.
Aaron Francis
@aarondfrancis
Codex just spent like 6 hours debugging CI while I played outside with my kids
Numman Ali
@nummanali
Bloody hell, I'll say this GPT 5.2 Codex Extra High is a methodical beast It's updating the OpenCode OpenAI Codex OAuth plugin Literally not leaving any stone unturned This is the first model that feels like it's building for itself ie leaving the door open for future work
Bindu Reddy
@bindureddy
Our ops team has switched to GPT 5.4 for ops and coding tasks It’s just way better for ops, SRE and cloud configuration issues Likely because it’s just a lot more aware of these knowledge bases
Garry Tan
@garrytan
OK Codex is GOAT at finding bugs and finding plan errors
Derya Unutmaz, MD
@DeryaTR_
My new Sunday morning routine: 1. Get coffee 2. Check GPT-5.4 projects on the Codex App, continue & start new ones 4. Launch ChatGPT 5.4 Pro for fresh brainstorming sessions 5. Think/learn how to use the 90% of AI capabilities I have yet to explore 6. Drink more coffee
John Jung
@johnjjung
Codex 5.3 xhigh spark has been phenomenal - you’re able to stay in a state of flow building. The focus and power of hitting problem after problem is incredible.
Mitchell Hashimoto
@mitchellh
I know this is pretty well established at this point, but Codex 5.3 is a much more effective model than Opus 4.6. I went back and forth on both for a bit, but haven't touched Opus at all now for a full week. First model to get me off of Opus... ever. Good job Codex team.
ORO AI ✈️ ETHDenver
@getoro_xyz
OpenAI rolls out GPT-5.3-Codex with faster AI coding and measurable efficiency gains. Look at the chart. That Kurzweil Curve doesn't happen by accident. It's the result of a new data diet plan, shifting toward real-world and private workflow data.
Guillermo Rauch
@rauchg
🆕 GPT 5.3 Codex (xhigh) achieves 90% on Next.js evals out of the box, "frame-mogging" the competition so to speak:
Flavio Adamo
@flavioAd
Codex app is the most 'non-native' app that somehow feels more native than native apps
Kristen Anderson
@FintechKristen
Because codex is the best for development. Everyone knows this. We aren’t using the other coding tools anymore.
Rudrank Riyam
@rudrank
I spent 3 hours debugging and running all kinds of tests with Opus 4.5 for the discrepancy between CLI vs iOS app embeddings and the retrieval 5.2 Codex xHigh did "thinking" for like 20 minutes and casually one-shot it
Henry
@henrytdowling
Codex is *really good* for coding, one day people will realize
Peter Steinberger 🦞
@steipete
codex is so good. point at messy PR, sizzles out the 3 fixes out of a big commit, cleanly separates it. done. also idk why it always says full gate but i fully adopted this.
AK
@ak_cozmo
codex hitting that inflection point where it's better at remembering API docs than i am. the shift from "AI suggests code" to "AI owns the implementation layer" is wild most underrated change: junior devs can now ship senior-level infra. distribution of execution ability is…
am.will
@LLMJunky
The Codex app server was such a brilliant stroke of foresight that really doesn't get enough love Not only are you allowed to use your chatgpt account with any harness, but you can build your own apps directly on top of theirs. They just make building on and with codex such a great experience
MJ
@mjackson
If you haven't tried Codex yet, you're missing something BIG.
Evan You
@youyuxi
Did a full repo internal / public docs vs. source code alignment check + update - GPT 5.4 did a significantly better job than Opus 4.6. Note this is not a coding task but more like research / documentation. Same prompt but GPT 5.4's proposed revisions captured my intent much...
Mitchell Hashimoto
@mitchellh
Ahhhh, Codex 5.3 (xhigh) with a vague prompt just solved a bug that I and others have been struggling to fix for over 6 months. Other reasoning levels with Codex failed, Opus 4.6 failed. Cost $4.14 and 45 minutes.
Mariusz Kurman
@mkurman88
Those who wrote "Try Codex" when I was hyping CC were right. Codex 5.3 is another level. It delivers so much with such high quality - I'm literally shocked. 5.2 was a mess; 5.3 is in another league.
Christopher Ehrlich
@ccccjjjjeeee
It actually worked! For the past couple of days I've been throwing 5.3-codex at the C codebase for SimCity (1989) to port it to TypeScript. Not reading any code, very little steering. Today I have SimCity running in the browser. I can't believe this new world we live in.
Angel ❄️
@Angaisb_
GPT-5.3 Codex is actually pretty insane with Three.js This Minecraft clone works smoothly and it didn't take too long to make I also tried Opus 4.6, but for some reason it got stuck
Pallav Agarwal
@pallavmac
Ok the new Codex app is incredible. You can build and run an Xcode project from Codex directly so you can vibecode iOS apps without opening Xcode!
Nate Berkopec
@nateberkopec
I have not seen a better code review agent that Codex 5.2 xhigh /review.
Thomas Ricouard
@Dimillian
Yes. At this point, I don't care about speed anymore. Speed is solved by running multiple tasks in parallel. What I want is an agent that can think out of the box like a human, and Codex does just that.
Gavin Nelson
@Gavmn
Favorite recent use of Codex: - pull data from my Apple Music library with a two decade old mess of genre metadata - use MusicKit to pull in proper Apple Music genre metadata - write an Apple Script to update genres with the data from Apple's catalog 💆🏻♂️
Ian Nuttall
@iannuttall
One thing I have noticed with Codex CLI and 5.2 Codex high model recently I never worry about the context window or compaction any more It just does it, really fast, and the agent carries on like nothing happened, no loss in quality
Numman Ali
@nummanali
Bloody hell, I'll say this GPT 5.2 Codex Extra High is a methodical beast It's updating the OpenCode OpenAI Codex OAuth plugin Literally not leaving any stone unturned This is the first model that feels like it's building for itself ie leaving the door open for future work
David Marcus
@davidmarcus
It's wild that every time you run a Codex code review from Claude Code, it finds critical issues. Not 95% of the times, 100%.
Victor Mota
@vimota
OpenAI got me with the 2x increased usage limits on the Codex desktop app. It's a really nice experience. Super smooth - claude code app is so laggy. And the handoff experience is amazing. > I started a session locally on codex app > had to leave so I handed it off to codex cloud (with 2 attempts) > got back to my computer, compared both attempts, picked the better one, synced it back to my computer > continued to iterate on it locally
ashe
@ashebytes
given the interest, I productized my video hub! - have 1 place for video drafts + X, Youtube, tiktok vids - use the studio to comment + collab with others - get transcripts + add API keys for autosyncs/agent chat made with codex 5.3 🖤 linked below
Theo - t3.gg
@theo
Almost every verifiable problem I've been sent so far has been solved by 5.3 Codex. Please make sure 5.3 Codex can't solve your problem before you submit it to me. I'm a youtuber not a prompt box.
Dennis Hannusch
@DennisHannusch
I started daily driving Codex with gpt-5.3-codex this week.. it's reaaally good. I've gotten used to complex workflows and context management, but Codex just does what I ask. I keep expecting quality to drop deep into a session, but it doesn't. @OpenAIDevs ya'll cooked!
Dan Shipper 📧
@danshipper
BREAKING: At the Super Bowl halftime show, Bad Bunny says he prefers Opus 4.6 for vibe coding but turns to 5.3 Codex for gnarly engineering problems. "Opus pa'' vibear, Codex pa'' lo heavy" - he said
Angel ❄️
@Angaisb_
GPT-5.3-Codex with image gen skill (NBP) I'm loving this model so much. This is one-shot
Video
Paul Solt
@PaulSolt
The Codex app feels like the missing IDE layer for the Codex CLI. One-click to open Xcode, run iOS/macOS apps, review diffs, and manage agents. Hard to go back after this.
Anthony
@kr0der
Codex v0.91.0 has plan mode, and it's really thorough. this one plan took 27% of its context. if you've used Codex you know that 27% is a lot which means it's thoroughly searching before creating plans - no rushing/taking shortcuts. try it out by adding 'collaboration_modes =…
Rudrank Riyam
@rudrank
Codex models is something you can just "trust" more than others I was in car and saw an issue created, and I let a cloud agent work on it for ~17 minutes
Xeophon
@xeophon
Longest Codex run achieved with 8 hours 👀
Aaron Francis
@aarondfrancis
Codex just spent like 6 hours debugging CI while I played outside with my kids
