Chat GPT’s hidden backup model just got smarter — as Open AI adds a cheaper Pro option | Tech Radar
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Chat GPT’s hidden backup model just got smarter — as Open AI adds a cheaper Pro option
Open AI just quietly upgraded the fallback AI many Chat GPT users hit after rate limits, while also introducing a new $100 Pro tier
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Chat GPT’s hidden backup model just got smarter and it’s a stealth upgrade that happens in the background
Open AI also announced a new $100 Pro plan, shaking up who gets access to its best tools
The changes show Open AI is making Chat GPT more tiered and more complex behind the scenes
Open AI just made two big changes to Chat GPT, but only one of them is obvious. The big news is that there’s now a new
The second change is introducing a new Chat GPT’s fallback model, for when you’ve hit your rate limits on Chat GPT-5.3 Instant. The new model is called Chat GPT-5.3 Instant Mini, and you can’t select it in the model picker, since it's what you default to when you’ve hit your rate limits.
Taken together, the new changes show Open AI is reshaping both the free-flow experience of using Chat GPT and the way it packages higher-end access.
Open AI introduces Chat GPT 5.4 Thinking for solving bigger problems
GPT-5 Instant Mini replaces Chat GPT-5.3 Instant as the fallback model you get after you’ve hit your GPT-5.3 Instant limits, which will depend on what plan you’re on. Before the new release, you were defaulting to Chat GPT-5 mini. Open AI claims that Chat GPT-5.3 Instant Mini outperforms GPT-5 Instant Mini across a range of different use cases.
“Compared with GPT-5 Instant Mini, GPT-5.3 Instant Mini feels more natural in conversation, with stronger writing and contextual awareness throughout chat”, Open AI said in the release notes for Chat GPT-5.3 Instant Mini.
The change is happening behind the scenes, but even if this only affects the “overflow” experience, it shows that this is where a lot of regular users end up. It’s the Pro users who will be less likely to be affected, since they have much higher usage rates.
At the same time, Open AI is introducing a new $100/month Pro tier (£89 in the UK, AU price to be determined) aimed at longer, high-intensity Codex sessions. It includes unlimited access to GPT-5.4, access to GPT-5.4 Pro, and temporary up to 10x mode Codex usage than the Plus tier.
What’s confusing is that the
Open AI describes the
There is also one small change for $20/month Plus users. The temporary Codex promotion on Plus is ending, so Open AI is rebalancing Plus usage to support more sessions across the week, rather than for longer, high-intensity sessions on a single day.
This is effectively Open AI redefining what Plus is for: lighter, steadier everyday use rather than heavy-duty bursts. At the same time, it's introducing a new middle tier in the hope that those people using Chat GPT Plus for coding will upgrade.
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Graham is the Senior Editor for AI at Tech Radar. With over 25 years of experience in both online and print journalism, Graham has worked for various market-leading tech brands including Computeractive, PC Pro, i More, Mac Format, Mac|Life, Maximum PC, and more. He specializes in reporting on everything to do with AI and has appeared on BBC TV shows like BBC One Breakfast and on Radio 4 commenting on the latest trends in tech. Graham has an honors degree in Computer Science and spends his spare time podcasting and blogging.
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Chat GPT’s hidden backup model just got smarter — as Open AI adds a cheaper Pro option
