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ChatGPT Pro inside Codex can fix problems that GPT-5.6 Sol Ultra struggles with, making it worth reaching for when you hit a wall with standard models. → Useful when Sol Ultra can't solve the problem → Works directly inside Codex without switching tools → Practical example: fixing issues in... show more

0xMarioNawfal

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61,512 views • 17 hours ago •via X (Twitter)

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Diego | AI 🚀 - e/acc

91,568 views • 1 month ago

i recreated this with GPT 5.6 Sol & it costed me ~$5 only & 2 prompts >GPT 5.6 Sol Ultra as the main agent, admin & orchestrator >GPT 5.6 Luna Max as sub-agents >used the Codex app >used about 20% of my weekly limit on $100 plan ($100/4 * 20%) some bugs, and improvements would take another prompt but pretty good for $5!

i recreated this with GPT 5.6 Sol & it costed me ~$5 only & 2 prompts >GPT 5.6 Sol Ultra as the main agent, admin & orchestrator >GPT 5.6 Luna Max as sub-agents >used the Codex app >used about 20% of my weekly limit on $100 plan ($100/4 * 20%) some bugs, and improvements would take another prompt but pretty good for $5!

anul agarwal

16,318 views • 22 days ago

Should we rebuild T3 Code in Swift? I have a Codex reset that expires tomorrow so I threw gpt-5.6-sol ultra at it. It did surprisingly well. Only took about 20% of my weekly limit!

Should we rebuild T3 Code in Swift? I have a Codex reset that expires tomorrow so I threw gpt-5.6-sol ultra at it. It did surprisingly well. Only took about 20% of my weekly limit!

Theo - t3.gg

126,982 views • 24 days ago

A soda-cans scroll animation using three.js with scroll animation. Completely built with Codex GPT 5.6 Sol Ultra in ~20mins. The textures are being generated by imagegen skill. Not polished version. This is crazy af Demo: Source:

A soda-cans scroll animation using three.js with scroll animation. Completely built with Codex GPT 5.6 Sol Ultra in ~20mins. The textures are being generated by imagegen skill. Not polished version. This is crazy af Demo: Source:

fatih kadir akın

12,933 views • 25 days ago

GPT-5.6 Sol Ultra lost to GPT-5.5 on physics at 3× the cost! We gave 4 models the same prompt: build three self-contained HTML5 canvas scenes with real physics demos Prompts: - A monster truck backflipping onto a parked car - A stunt car jumping six buses into a brick wall - A train derailing off a broken bridge into the water Outputs: GPT-5.6 Sol Ultra: 32.9K tokens, $0.33 Opus 4.8: 9.2K tokens, $0.24 GPT-5.5: 12.4K tokens, $0.11 Grok 4.5: 7.0K tokens, $0.08 Sol Ultra draws just like GPT-5.5, only with more detail and it shows clearest on the bus jump where the two look almost identical. In the other tests Sol Ultra came out worse than its predecessor and the physics really got weaker. We think GPT-5.5 took the truck flip and the train outright. With Sol Ultra you basically get GPT-5.5 with weaker physics and a nicer picture for 3x the price. Newborn Grok 4.5 failed two of the three tests and only came good on the train

GPT-5.6 Sol Ultra lost to GPT-5.5 on physics at 3× the cost! We gave 4 models the same prompt: build three self-contained HTML5 canvas scenes with real physics demos Prompts: - A monster truck backflipping onto a parked car - A stunt car jumping six buses into a brick wall - A train derailing off a broken bridge into the water Outputs: GPT-5.6 Sol Ultra: 32.9K tokens, $0.33 Opus 4.8: 9.2K tokens, $0.24 GPT-5.5: 12.4K tokens, $0.11 Grok 4.5: 7.0K tokens, $0.08 Sol Ultra draws just like GPT-5.5, only with more detail and it shows clearest on the bus jump where the two look almost identical. In the other tests Sol Ultra came out worse than its predecessor and the physics really got weaker. We think GPT-5.5 took the truck flip and the train outright. With Sol Ultra you basically get GPT-5.5 with weaker physics and a nicer picture for 3x the price. Newborn Grok 4.5 failed two of the three tests and only came good on the train

atomic.chat

897,956 views • 1 month ago

I had Codex Desktop and GPT-5.6 Sol Ultra take a go at building my Raccoon Heist game and it did an even better job than Claude Fable 5 did! Here's "Moonlight & Mayhem", now with a team of raccoons raiding a museum for the Golden Sardine

I had Codex Desktop and GPT-5.6 Sol Ultra take a go at building my Raccoon Heist game and it did an even better job than Claude Fable 5 did! Here's "Moonlight & Mayhem", now with a team of raccoons raiding a museum for the Golden Sardine

Simon Willison

37,860 views • 16 days ago

The character pipeline is moving forward: animations are now working. I lost some time because Codex occasionally switched GPT-5.6 Sol back to Light/Medium by default, and the difference in task execution was immediately noticeable. After switching back to GPT-5.6 Sol Ultra, progress was much smoother. Using animations from Mixamo, the character can now idle, walk, run and jump. Next: shoes, skin variations and different body types. Then I need to decide what this project should become: • A character generator website? • A reusable Codex skill? • An open-source GitHub repo? What would be the most useful?

The character pipeline is moving forward: animations are now working. I lost some time because Codex occasionally switched GPT-5.6 Sol back to Light/Medium by default, and the difference in task execution was immediately noticeable. After switching back to GPT-5.6 Sol Ultra, progress was much smoother. Using animations from Mixamo, the character can now idle, walk, run and jump. Next: shoes, skin variations and different body types. Then I need to decide what this project should become: • A character generator website? • A reusable Codex skill? • An open-source GitHub repo? What would be the most useful?

Givros

16,719 views • 1 month ago

When GPT-5 came out, I created a procedural brutalist city builder as a demo (you can see it in the quoted tweet) I used GPT-5.6 Sol in Codex to do the same thing, touching no code. Less than a year... Play with it (its fun, if you like cities):

When GPT-5 came out, I created a procedural brutalist city builder as a demo (you can see it in the quoted tweet) I used GPT-5.6 Sol in Codex to do the same thing, touching no code. Less than a year... Play with it (its fun, if you like cities):

Ethan Mollick

186,463 views • 1 month ago

I tested my Blender character creation skill with Codex + GPT-5.6 Sol Ultra. The full prompt: “Create a Three.js game where the player explores different biomes. Create the character and animations with skill-blender-character.” Codex built the world, created the low-poly character in Blender, generated the outfit and integrated the animations into the game. One prompt, one custom skill, one playable prototype.

I tested my Blender character creation skill with Codex + GPT-5.6 Sol Ultra. The full prompt: “Create a Three.js game where the player explores different biomes. Create the character and animations with skill-blender-character.” Codex built the world, created the low-poly character in Blender, generated the outfit and integrated the animations into the game. One prompt, one custom skill, one playable prototype.

Givros

10,599 views • 1 month ago

Two frontier models. Two very different demos. (GPT-5.6 Sol and Claude Fable 5) GPT-5.6 Sol Ultra was pushed in a mathematical direction and generated a Minecraft-style clone in Lean. Yes, that Lean. Meanwhile, Claude Fable 5 took a game development route and built a Minecraft mod featuring a Dark Souls-inspired enemy with multiple attack patterns, combos, and combat logic. They're solving completely different problems, but both are great examples of how capable today's models have become. The pace of progress is remarkable.

Two frontier models. Two very different demos. (GPT-5.6 Sol and Claude Fable 5) GPT-5.6 Sol Ultra was pushed in a mathematical direction and generated a Minecraft-style clone in Lean. Yes, that Lean. Meanwhile, Claude Fable 5 took a game development route and built a Minecraft mod featuring a Dark Souls-inspired enemy with multiple attack patterns, combos, and combat logic. They're solving completely different problems, but both are great examples of how capable today's models have become. The pace of progress is remarkable.

FHILY👑

19,336 views • 1 month ago

When you give GPT-5.6 Sol Ultra a project to work on, tell it to use its built-in TODO list functionality to manage things, and then leave it to its own devices for 3 days, you’re liable to come back and find a totally insane list like this, lmao:

When you give GPT-5.6 Sol Ultra a project to work on, tell it to use its built-in TODO list functionality to manage things, and then leave it to its own devices for 3 days, you’re liable to come back and find a totally insane list like this, lmao:

Jeffrey Emanuel

108,587 views • 1 month ago

Today, we launched browser use inside Codex to further close the build & verify loop for local development! Now, you can ask Codex to build your front end, and test it like a user would by clicking through the app. Codex sees everything a user sees through vision & checks the network/console logs to help debug & fix any issues that it finds. This change brings us closer to fully autonomous coding agents that delivers high quality and tested changes. Watch Codex test my app in the browser, catch & fix a real bug, and doing that loop again with a brand new feature.

James Sun

226,907 views • 4 months ago

I made a Dark Souls-inspired Three.js game with Sol Ultra using Codex Sites. It's fully playable in the browser. I handled the prompts, references, and libraries like img2threejs. The game has shield blocking, dodge rolls, archery, and a full inventory system. Still blows my mind that you can build a 3D game like this in a single afternoon.

I made a Dark Souls-inspired Three.js game with Sol Ultra using Codex Sites. It's fully playable in the browser. I handled the prompts, references, and libraries like img2threejs. The game has shield blocking, dodge rolls, archery, and a full inventory system. Still blows my mind that you can build a 3D game like this in a single afternoon.

Meng To

169,453 views • 1 month ago

GPT 5.6 SOL IS HERE! How to run your personal + business life with GPT 5.6 Sol + Codex (full 49 min masterclass) We tested it for 30 days and the video it's the CLEAREST look at the FUTURE of work: Here's what's possible once you set it up: 1. Your inbox becomes cards every morning, each with a summary and a reply drafted in your own voice. Y 2. Your Slack, meeting notes, and company updates can turn into one daily feed with a clear next action. It learns what you care about over time and rewrites its own prompts to get sharper. 3. You can give your agent its own email address, so your other tools and even your team's Slack bot email it directly and it just handles things. 4. You can have it watch you do a task once and turn it into a skill it repeats forever. 5. You can set a long goal and walk away. You can have it run for 20 hours straight, and fine-tune your own models, something that was out of reach for non-engineers 12 months ago. How to start: Open Codex, give it access to your computer, and ask it to suggest things it could do for you based on how you already work. Full episode on The Startup Ideas Podcast (SIP) 🧃 (thanks Dan Shipper 📧 for sharing your entire workflow and review of GPT 5.6) Start with one boring task, get it working, and build from there. You'll learn exactly how to make something similar. GPT 5.6 Sol is impressive. Sol (according to openAI benchmarks) is the best coding model out right now. It set a new state of the art on Terminal-Bench 2.1 at 88.8%, and its "ultra mode" hits 91.9%, beating Claude Opus 4.8, Fable 5, and even Mythos 5 this masterclass is 100% free, like always. For more The Startup Ideas Podcast (SIP) 🧃 Watch

GPT 5.6 SOL IS HERE! How to run your personal + business life with GPT 5.6 Sol + Codex (full 49 min masterclass) We tested it for 30 days and the video it's the CLEAREST look at the FUTURE of work: Here's what's possible once you set it up: 1. Your inbox becomes cards every morning, each with a summary and a reply drafted in your own voice. Y 2. Your Slack, meeting notes, and company updates can turn into one daily feed with a clear next action. It learns what you care about over time and rewrites its own prompts to get sharper. 3. You can give your agent its own email address, so your other tools and even your team's Slack bot email it directly and it just handles things. 4. You can have it watch you do a task once and turn it into a skill it repeats forever. 5. You can set a long goal and walk away. You can have it run for 20 hours straight, and fine-tune your own models, something that was out of reach for non-engineers 12 months ago. How to start: Open Codex, give it access to your computer, and ask it to suggest things it could do for you based on how you already work. Full episode on The Startup Ideas Podcast (SIP) 🧃 (thanks Dan Shipper 📧 for sharing your entire workflow and review of GPT 5.6) Start with one boring task, get it working, and build from there. You'll learn exactly how to make something similar. GPT 5.6 Sol is impressive. Sol (according to openAI benchmarks) is the best coding model out right now. It set a new state of the art on Terminal-Bench 2.1 at 88.8%, and its "ultra mode" hits 91.9%, beating Claude Opus 4.8, Fable 5, and even Mythos 5 this masterclass is 100% free, like always. For more The Startup Ideas Podcast (SIP) 🧃 Watch

GREG ISENBERG

155,815 views • 1 month ago

People are wiring Kimi K3 straight into Codex to skip its own app The model is elite. The Kimi app is the weak part. So builders connect their Kimi subscription to Codex through OAuth instead 👇 ▫️ K3 shows up in the model picker next to Sol 5.6 ▫️ No API key, no extra subscription ▫️ Sign in with OAuth, done The frontier model, running inside the coding tool people actually like using. When the model outgrows the app, users just route around it

People are wiring Kimi K3 straight into Codex to skip its own app The model is elite. The Kimi app is the weak part. So builders connect their Kimi subscription to Codex through OAuth instead 👇 ▫️ K3 shows up in the model picker next to Sol 5.6 ▫️ No API key, no extra subscription ▫️ Sign in with OAuth, done The frontier model, running inside the coding tool people actually like using. When the model outgrows the app, users just route around it

Ruben

58,369 views • 1 month ago

GPT-5.6 Sol has been used to solve open problems in mathematics. So why was it struggling with ARC-AGI-3, a benchmark of 2D puzzle games? We investigated. The harness was not letting it remember what it had learned. We found that enabling two API settings tripled our scores with 6x fewer output tokens.

GPT-5.6 Sol has been used to solve open problems in mathematics. So why was it struggling with ARC-AGI-3, a benchmark of 2D puzzle games? We investigated. The harness was not letting it remember what it had learned. We found that enabling two API settings tripled our scores with 6x fewer output tokens.

OpenAI

1,222,349 views • 25 days ago

GPT-5.6 Sol just changed how I build websites with AI. In this full 10-minute video, I test Sol and Terra inside Codex to build a cinematic landing page from a video reference. I cover: → Which GPT-5.6 model to use → How I analyze a full website experience → How I recreate the layout, motion and interactions → Why better prompting matters more than one-shot results → How to avoid generic AI slop The model matters—but the way you guide it matters even more. Watch the full process below 👇 Want the free template and the exact prompt I used? They’re available exclusively in the description of the YouTube version:

GPT-5.6 Sol just changed how I build websites with AI. In this full 10-minute video, I test Sol and Terra inside Codex to build a cinematic landing page from a video reference. I cover: → Which GPT-5.6 model to use → How I analyze a full website experience → How I recreate the layout, motion and interactions → Why better prompting matters more than one-shot results → How to avoid generic AI slop The model matters—but the way you guide it matters even more. Watch the full process below 👇 Want the free template and the exact prompt I used? They’re available exclusively in the description of the YouTube version:

Sourasith

261,047 views • 1 month ago

Opus 5 is a modest upgrade, but it has tough competition in GPT-5.6 Sol Initial thoughts from our early access: > Clearer writing than Fable's dense communication style > Still gets too verbose compared to GPT models (even when explicitly instructed to keep text purposeful) > Strong on browser use inside Hyperagent > Strong on reviewing complex data to justify a decision > Less likely to take creative risks. More of a "rule follower" personality. Costs shown for five test cases (GPT-5.6 Sol was consistently much cheaper) Explore and judge the actual work for yourself in thread 👇

Opus 5 is a modest upgrade, but it has tough competition in GPT-5.6 Sol Initial thoughts from our early access: > Clearer writing than Fable's dense communication style > Still gets too verbose compared to GPT models (even when explicitly instructed to keep text purposeful) > Strong on browser use inside Hyperagent > Strong on reviewing complex data to justify a decision > Less likely to take creative risks. More of a "rule follower" personality. Costs shown for five test cases (GPT-5.6 Sol was consistently much cheaper) Explore and judge the actual work for yourself in thread 👇

Hyperagent

153,112 views • 1 month ago

GPT-5.6 Sol one Shotted The Sims >this is without codex or any coding harness >one shot entire game with logic in 48 minutes roon Adam.GPT when we can have big model taste and personality ? like after GPT 5 its so robotic > Webdev needs real upgrade, I think this should not be hard enough as even cheap chinese ai companies are able to achieve this > Prompt following specifically any character it's so impossible to make ChatGPT follow rules and characters

GPT-5.6 Sol one Shotted The Sims >this is without codex or any coding harness >one shot entire game with logic in 48 minutes roon Adam.GPT when we can have big model taste and personality ? like after GPT 5 its so robotic > Webdev needs real upgrade, I think this should not be hard enough as even cheap chinese ai companies are able to achieve this > Prompt following specifically any character it's so impossible to make ChatGPT follow rules and characters

Chetaslua

10,190 views • 1 month ago

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DUKE 🇲🇾

85,423 views • 10 months ago