2026年免費AI聊天GPT：使用GPT-4、GPT-3和ChatGPT的所有方法而不需付費

如果你想 免費 AI 聊天 GPT 在 2026 年的訪問中，首先要修正的是詞彙。搜尋者仍然將 GPT-4、GPT-3 和 ChatGPT 當作一個穩定的產品線來詢問。事實並非如此。OpenAI 當前的 ChatGPT 免費層常見問題 表示免費用戶現在獲得真正的 $0 計劃，包含 GPT-5.2、網路搜尋、檔案和圖片上傳、數據分析、圖片創建以及訪問 GPTs。OpenAI 的 ChatGPT 發布說明 也顯示出產品線的變化速度：GPT-4 在 2025 年 4 月 30 日, } 被從 ChatGPT 中退役，而 GPT-4o 加上 GPT-4.1 則在 2026 年 2 月 13 日. } 從 ChatGPT 中退役。這並不意味著免費的 GPT 風格聊天消失了。這意味著關鍵詞落後於產品。.

在實踐中，仍然有很多合法的方式可以獲得 gpt ai 聊天 的體驗而不需要付費：ChatGPT 免費版、登出狀態的 ChatGPT、Apple Intelligence 的 ChatGPT 擴展、學校付費訪問、有限的 API 試用訪問、研究信用、以隱私為先的包裝工具如 Duck.ai，以及開放權重的本地選項，如 OpenAI 的 gpt-oss 模型。OpenAI 的更新版本 GPT-5.4 小型公告 甚至表示免費和 Go 用戶可以通過 思考 功能在 ChatGPT 中訪問 GPT-5.4 小型版本，這很好地提醒我們免費模型的組合現在是動態且依賴於模式的。.

我檢查了官方產品頁面、幫助文檔、定價頁面和支持文章， 2026年4月12日 以驗證本指南中的每一項聲明。這很重要，因為免費限制、訪客訪問、模型名稱，甚至哪些舊版 GPT 模型仍然存在都可能迅速改變。如果你在這之後需要的不是個人 AI 標籤，而是面向客戶的 Messenger、Instagram 或網站聊天機器人，請比較在 查看 MessengerBot 價格. 本文緊緊聚焦於零美元訪問的問題。.

2026 年「免費 AI 聊天 GPT」的真正含義

這個短語看起來簡單。實際上，它隱藏了至少六種不同的提議.

首先，有一個真正的永久免費計劃. 這是最簡單的情況。你創建一個帳戶，使用官方產品，並保持在 $0 級別，並有速率限制。ChatGPT 免費版就是明顯的例子.

其次，有訪客訪問. OpenAI 的 ChatGPT 首頁文章 說你可以在創建帳戶之前使用 ChatGPT。這很有用，但它並不等同於完整的免費工作區。登出用戶一次只能進行一個對話，聊天無法真正保留，並且默認情況下這些聊天仍然用於訓練，除非你更改瀏覽器級別的設置.

第三，有操作系統級別或設備級別的路由. 蘋果的 ChatGPT 擴展支持頁面 表示您可以通過 Apple Intelligence 使用 ChatGPT，而無需帳戶。這是一條真正的途徑，並且比大多數人意識到的更有趣，因為 Apple 還表示無帳戶請求不會與您的 Apple 帳戶綁定，OpenAI 也不得儲存或訓練這些請求。.

第四，有機構支付的訪問權限。. OpenAI 的 ChatGPT 教育頁面 表示校園的訊息限制顯著高於公共免費計劃，並且隱私控制更強。這在經濟意義上並不是免費的，因為學校或機構支付，但對用戶來說仍然是零自付的訪問。.

第五，有有限的 API 訪問權限。. OpenAI 的 計費設置文章 明確列出了一個 API 探索 “免費試用” 計劃 功能有限。這意味著 “我可以免費使用 API 嗎？” 不再是一個簡單的是或否問題。有些用戶可以進行測試。沒有人應該假設有持久的生產訪問權限而不進行計費。.

第六，有包裝和開放權重的途徑。. DuckDuckGo的 Duck.ai 模型列表 顯示可以免費訪問 OpenAI 的 GPT-4o mini、GPT 5 mini 和 gpt-oss-120b。OpenAI 自己的 gpt-oss 常見問題 表示這些開放權重模型可以在 Apache 2.0 下免費下載和使用，但您仍需自行支付任何計算或托管費用。.

這是核心地圖。一旦您將這六條路線分開，整個市場就更容易理解。大多數糟糕的文章仍然將它們混在一起，然後對用戶遇到登錄牆、速率限制或帳單感到驚訝。.

當前使用 ChatGPT 免費的最快合法方法

如果您只想要簡短的答案，這些是截至 2026 年 4 月 12 日仍然有效的合法無成本路徑。.

對於大多數讀者來說，實用的排名很簡單： 首先從普通的 ChatGPT 免費帳戶開始, 只有在不關心歷史時才使用登出狀態的 ChatGPT，如果您已經生活在 Apple Intelligence 內，則使用 Apple 的擴展，如果隱私比持久性更重要，則使用 Duck.ai，只有在您實際計劃構建某些東西時才考慮 API 路徑。.

最後這一區別比人們預期的更重要。一個免費的 chatgpt ai 機器人 用於個人寫作或學習，與應用開發的免費途徑並不相同。如果您從隨意提示轉向客戶消息，最終將需要一個工作流程層，而不僅僅是一個更智能的文本框。對於這一過渡的構建方面，伴隨的閱讀是我們的指南， 為業務構建和集成 ChatGPT 聊天機器人.

ChatGPT Free vs Guest Mode vs Apple Intelligence: Which One Is Actually Useful?

This is where most “free ChatGPT” advice gets sloppy. Not all free routes feel the same once you try to do real work.

ChatGPT Free account is the real default

OpenAI 的 Free Tier FAQ is much better than older versions. It says Free users get GPT-5.2, web search, data analysis, file and image uploads, image creation, and access to GPTs. It also says Free users cannot create GPTs; the GPT creator is limited to paid plans. That is a meaningful distinction. If your goal is everyday personal work, Free is not a teaser anymore. It is a legitimate product.

The catch is not that Free is fake. The catch is that Free is broad, not deep. OpenAI says GPT-5.2 use is limited within a five-hour window, and some tools such as uploads, data analysis, and image creation have separate caps. That means the free experience is excellent for a mixed day of writing, planning, quick research, and occasional uploads. It becomes less comfortable when you try to run a heavy file workflow for hours straight.

Logged-out ChatGPT is better than most people think, but only for throwaway work

OpenAI 的 home page help article says you can use ChatGPT before creating an account, but it also states the limit clearly: while logged out, you only get one conversation at a time. The article also says chats are only accessible for the current browser session and are used for training by default unless you opt out in settings.

That makes guest mode a very specific tool. It is strong for one-off prompts, quick explanations, and disposable drafting. It is weak for anything that depends on continuity. If you need saved chats, reusable prompts, uploads you can revisit, or even just a sane multi-thread workflow, you are already beyond what guest mode was built for.

Apple Intelligence is the cleanest hidden route for account-free ChatGPT

Apple’s support page is unusually explicit. It says you can tap Enable ChatGPT and use ChatGPT without an account. More importantly, Apple says that if you use the extension without signing in, OpenAI does not receive information tied to your Apple Account, must process the data only to fulfill the request, must not store the request or response except where legally required, and must not use the request to improve or train its models.

That is stronger than ordinary guest mode. It does not make Apple Intelligence a replacement for a full ChatGPT workspace, because you still work through Siri, Writing Tools, and related system surfaces. But if you are on a supported iPhone, iPad, or Mac and want the lowest-friction way to ask ChatGPT for help without making another account, this is one of the best routes in the whole market.

Institution-paid access is the best free option if someone else is footing the bill

OpenAI’s education page says ChatGPT Edu gives significantly higher message limits than the free version plus dedicated workspaces, privacy protections, SSO, and admin controls. For students and staff, that can be the most valuable “free ai chat gpt” route of all because it feels more like a paid workspace without personal spend.

The practical advice here is blunt. Before you pay for ChatGPT Plus, check whether your school already has a legitimate ChatGPT workspace. Many people are double-paying simply because they assume consumer access is the only path.

Can You Still Use GPT-4 for Free in 2026?

Yes and no, and this is exactly where search results stay messy.

No, there is no normal direct GPT-4 text tab inside current ChatGPT. OpenAI’s release notes say GPT-4 was retired from ChatGPT on 2025 年 4 月 30 日 and replaced there by GPT-4o. OpenAI then announced in the same release notes that GPT-4o, GPT-4.1, GPT-4.1 mini, and OpenAI o4-mini would be retired from ChatGPT on 2026 年 2 月 13 日. API access remained unchanged.

Yes, you can still reach some GPT-4-family behavior through other routes. Duck.ai’s model page says free users can choose OpenAI’s GPT-4o mini. OpenAI’s own GPT-4.1 launch page still documents GPT-4.1, GPT-4.1 mini, and GPT-4.1 nano pricing in the API. That is useful for developers, not for people looking for a permanent free GPT-4 browser tab.

So when you see a site promise a gpt 4 ai chatbot for free in 2026, ask three questions immediately:

1. Is it actually giving you a current OpenAI model, or just using GPT-4 as a traffic keyword?
2. Is it an official route, a wrapper like Duck.ai, or an opaque third-party proxy?
3. Can it tell you what happens to your data, or is the model label doing all the work while the privacy page stays vague?

That filter removes most of the junk instantly. In practical terms, “free GPT-4” now usually means one of four things: GPT-4o mini in a wrapper, legacy API access that is not actually free, an outdated article, or a sketchy proxy that you should not trust with anything important.

Is There Any Legit Free GPT-3 AI Chat Left?

This is the other stale keyword that refuses to die. People still search gpt-3 ai chat 並 gpt 3 ai chat because GPT-3.5 was the first model family many casual users remember. But in 2026, GPT-3 is a legacy API story, not a normal ChatGPT story.

OpenAI’s current GPT-3.5 Turbo model page labels it a legacy GPT model and says, in plain terms, that developers should use gpt-4o-mini in place of GPT-3.5 Turbo because it is cheaper, more capable, multimodal, and just as fast. The same page says GPT-3.5 Turbo is still available for use in the API.

That gives you the honest answer:

• If you want a consumer chatbot, do not hunt for GPT-3 specifically. ChatGPT no longer works that way.
• If you need GPT-3.5 for compatibility or legacy code, it still exists in the API.
• If you want the cheapest practical OpenAI chat model, OpenAI itself is pointing you toward newer mini models instead.

The pricing tells the same story. OpenAI’s current GPT-3.5 Turbo model page shows $0.50 per 1M input tokens 並 $1.50 per 1M output tokens. That sounds cheap, and it is. But the model is still legacy, and it is not a good reason to chase outdated free GPT-3 browser tools.

So is there a legit free GPT-3 chat experience? Not really in the mainstream consumer sense. What exists is legacy API availability plus a long tail of websites still using GPT-3 naming because it ranks. That is not the same thing as a healthy product category.

Can You Use the OpenAI API for Free in 2026?

This is the part most blog posts either overpromise or explain badly.

OpenAI 的 計費設置文章 says ChatGPT billing and API billing are separate systems. It also says API users can be on a Pay-As-You-Go plan, 一個 Custom plan, or an 探索 “免費試用” 計劃 that comes with limited functionality. That is the official starting point.

What the article does 表示收件人已打開消息線程。Messenger 不會 do is promise that every new developer will receive a big, durable pile of free credits the way older tutorials often implied. That is why the clean 2026 answer is this: some API experimentation is possible without paying, but you should not assume a predictable no-credit-card production path. That conclusion is an inference from OpenAI’s public billing docs, not a hidden support statement.

The Researcher Access Program is the one official credit path that is still unusually clear. OpenAI’s application page says researchers can apply for up to $1,000 of API credits, valid for 12 months, with application reviews happening once every three months. That is real. It is also narrow. Most casual builders will not qualify.

If you want the practical rule:

• Use ChatGPT Free if you only need personal prompting.
• Use the API trial only to learn the Platform or test a prototype.
• Expect to add billing if the project is actually going anywhere.
• Apply for research credits only when you have a real research case, not just because “free credits” sounds nice.

OpenAI’s current GPT-5.4 announcement also shows why the old “API is basically free” habit no longer makes sense. As of April 12, 2026, GPT-5.4 is listed at 每百萬個輸入標記$2.50 並 每百萬個輸出標記$15. Those are fair developer prices. They are not free, and they should be budgeted like any other infrastructure line item.

The Best Legit Wrappers and Shortcuts for Free GPT Chat

If you do not care whether the interface says ChatGPT on the tab and only care about getting useful OpenAI-style chat behavior for free, wrappers and shortcuts are where the market gets interesting.

Duck.ai is the cleanest free wrapper right now

DuckDuckGo is doing something smarter than most wrappers do. Its model page says Duck.ai currently supports OpenAI’s GPT-4o mini, GPT 5 mini, and gpt-oss-120b in the free version. Its usage limits page says the service is free to use but has a daily limit.

The privacy side is why Duck.ai stands out. DuckDuckGo’s privacy page says chats are anonymized and personal metadata such as IP address is stripped before prompts are sent to model providers, while the recent chats page says chat history is private and stored locally on your device by default unless you enable Sync and Backup. That is a much stronger free posture than a random anonymous GPT site.

The downside is obvious: daily caps, fewer workspace features, and less continuity than a normal logged-in ChatGPT account. For quick chatgpt chatbot ai-style use without committing to OpenAI’s full account workflow, it is one of the best options on the web.

Apple Intelligence is a wrapper, just a very polished one

Most people think of Apple’s ChatGPT integration as an Apple feature, not a wrapper. In practice, it behaves like a tightly controlled wrapper with much better UX. You use Siri, Writing Tools, or a Shortcut, Apple handles the routing, and ChatGPT answers the request. Because Apple publishes clearer privacy language than many third-party wrappers, it is also safer to recommend.

If you are already on Apple hardware, this route makes more sense than a random “free GPT-4” website. The feature is built into an environment you are already using, and the privacy obligations are published by Apple in plain English.

Most anonymous “free GPT-4” sites are not worth trusting

This is the part most roundups avoid. The internet is full of thin pages promising instant GPT-4 or ChatGPT access with no login, no limits, and no cost. A lot of them are traffic arbitrage, affiliate bait, or barely maintained proxies. The model naming is often stale, the privacy page is vague, and the uptime is fragile.

The safe filter is boring, but it works:

• Prefer official products, Apple-level integrations, or established privacy-first intermediaries like Duck.ai.
• Avoid sites that cannot clearly tell you what model you are using and how your data is handled.
• Assume any unknown free proxy can disappear, degrade, or silently change providers.

If your use case is low-stakes and playful, you can experiment. If your use case involves client work, drafts you care about, or anything sensitive, the wrapper should be either official or unusually transparent.

Best Free Alternatives When ChatGPT Is Not Enough

Sometimes the right answer is not more clever ways to squeeze one more day out of ChatGPT Free. Sometimes the right answer is to use the best alternative for the specific job.

The fastest way to choose among them is to stop asking which one is the smartest in the abstract and ask which one wins your dominant job.

Choose ChatGPT Free if you want the best generalist. It is still the safest default when you do not yet know whether your main job is writing, planning, light coding, brainstorming, or quick research.

Choose Gemini if your work is heavy on Google docs, class materials, note packs, or long files. Google’s free limit page is also better than most competitors because it actually publishes specific quotas.

Choose Claude if your real benchmark is writing quality. Anthropic’s pricing page makes clear that Free is real, but limited. That is enough for a lot of editing work.

Choose Perplexity when you need receipts. A lot of 免費 AI 聊天 GPT searches are really research-intent searches in disguise. Perplexity is better than most assistants at making the sources visible.

Choose Copilot when you want something easy and web-grounded without another elaborate setup. Microsoft’s support docs are refreshingly blunt that sign-in is optional for use, but useful for longer conversations and extra features.

If you want the low-friction product list after this article, 瀏覽我們的教程 once you are ready to move from personal AI tools into actual chatbot workflows on Messenger, Instagram, or a website. That is where the decision changes from model quality to delivery design.

Open-Weight and Local Options if You Want ChatGPT-Style Control Without a Subscription

The most undercovered shift in this whole market is that OpenAI now has an official open-weight route.

OpenAI 的 gpt-oss 常見問題 says the model weights are free to download and use under the Apache 2.0 license. The same article says gpt-oss is not available through the OpenAI API, and that API pricing and rate limits do not apply. It also says the models can run with common inference stacks such as vLLM, Ollama, and llama.cpp.

That is a much bigger deal than it looks. If your real goal is not brand-pure ChatGPT access but a controllable OpenAI-flavored model you can host yourself, gpt-oss is now a serious answer. It is not “free” in the childish sense because GPUs, storage, electricity, or hosted inference still cost money. But it 是 free in the licensing sense, and it removes the subscription and per-token meter from the equation.

There are really three ways to use open-weight GPT-style chat now:

1. Run gpt-oss locally on a machine you control.
2. Run it on rented infrastructure and pay only the hosting layer.
3. Use a hosted surface that already exposes it, such as Duck.ai’s free gpt-oss-120b option.

Duck.ai’s published model list makes that third route especially interesting because it lets you sample an OpenAI open-weight model without building your own stack first. That is useful if you want to know whether the local path is worth your time before you start messing with GPUs, model quantization, or inference servers.

So if your question is, “How do I get ChatGPT-like capability without paying OpenAI every month?” the answer is not only “find a free website.” The better 2026 answer may be “use a good wrapper” or “host an open-weight model yourself.”

Where Free GPT Chat Still Falls Short for Real Work

The reason free AI guides age so badly is that they often test the first prompt and stop there. Real limits show up in the fourth prompt, the second file, the long thread, or the moment you need to reuse the work next week.

Here are the limits that matter more than homepage marketing:

1. Session depth

Can the tool survive a back-and-forth or does it feel good for one reply and collapse after that? Guest modes usually break here first.

2. File reality

OpenAI, Google, and Perplexity all now make uploads part of the public free story. That is good. It also means you should test uploads early. A “free” plan that cannot handle your actual PDFs or data files is not free for your use case.

3. Reset rhythm

OpenAI’s free window is five-hour based. Claude’s free usage resets every five hours. Gemini publishes prompt and feature caps. Perplexity gives you five Pro Searches a day on free. The reset pattern changes how the product feels once it becomes part of your week.

4. Privacy posture

ChatGPT logged out uses chats for training by default. Apple’s account-free extension route explicitly says OpenAI must not store or train on the request. Duck.ai says it anonymizes prompts, strips IP-linked metadata, and keeps recent chats private on-device by default. Those are radically different trust models even though all three feel “free.”

5. Product continuity

Searchers still ask for GPT-4 and GPT-3 because old labels stick. The product underneath keeps moving. If the article you are reading does not mention specific retirement dates and current model names, it is probably already drifting out of date.

The seven-step test I use for any free gpt ai 聊天 product is simple:

1. Ask one easy question and grade the raw answer.
2. Ask two dependent follow-ups and see whether context holds.
3. Paste a longer block of text or upload a small file.
4. Request a rewrite, a summary, and a bullet list from the same material.
5. Ask one current-events or product question that needs fresh information.
6. Leave and come back to test whether continuity survives.
7. Check what the product says about training, history, and limits before you trust it with anything meaningful.

That process is more useful than almost any top-10 roundup because it matches how real work breaks tools.

Which Free Route Is Best for Writing, Research, Coding, Privacy, and Business Use?

You do not need one universal winner. You need the right free route for the job in front of you.

Best free route for everyday writing and general tasks

ChatGPT免費版 is still the best default for mixed work. The combination of GPT-5.2, limited GPT-5.4 mini in Thinking, search, files, images, data analysis, and GPT access gives it the widest overall range. If your use case changes from hour to hour, this is the safest home base.

Best free route for research and citations

Perplexity wins when citations matter, with Copilot as a useful backup. If your free AI habit is really a search habit, Perplexity’s source-first experience saves time.

Best free route for writing quality

Claude still has the cleanest editing voice of the mainstream free tools. It is especially good for rewrites, tone cleanup, and longer-form polishing.

Best free route for privacy

Apple Intelligence without a ChatGPT account is the strongest mainstream option if you are already in Apple’s ecosystem. Duck.ai is the strongest browser-first option because DuckDuckGo actually publishes detailed chat privacy language.

Best free route if you specifically want OpenAI model access outside ChatGPT

Duck.ai is the most credible answer because it names the models directly and publishes what it does with your data. Random anonymous GPT sites do not.

Best route if you want to build, not just chat

Use the API trial to learn, then expect to pay. If the goal is coding against OpenAI, consumer chat products are the wrong benchmark. Start small, verify the Explore free-trial behavior on your account, and move to pay-as-you-go once the project is serious.

Best route if you want customer-facing chat instead of another personal assistant tab

This is where the answer changes categories completely. Yes, ChatGPT is a chatbot. But when people ask is chatgpt a chatbot, the real answer is: yes for user interaction, no for full business messaging operations. A personal AI assistant helps you think. A production chatbot needs channels, routing, forms, knowledge control, automation, and handoff.

That is why a free personal AI plan does not replace a bot platform. If the next step is Messenger, Instagram, or website automation, start with 瀏覽我們的教程. If your workflow is getting bigger than a starter setup can handle, Upgrade to MessengerBot Pro when you need stronger workflow depth rather than trying to force a consumer AI tab into a job it was never built to own.

How to Avoid Fake “Free GPT-4” Sites and Pick a Route That Will Still Work Next Month

There is a simple reason so many people get burned in this keyword cluster: they optimize for zero friction and forget to ask whether the route is durable.

Here is the checklist I use before I trust any free GPT access path:

• Check the source of truth. Does the service have an official pricing or help page describing the free access, or are you relying on Reddit screenshots and SEO pages?
• Check the current model language. If the site talks about GPT-4 in a way that ignores the 2025 and 2026 ChatGPT retirements, it is probably using stale copy.
• Check the privacy page. If you cannot find a clear statement about storage, training, or personal metadata, assume the free plan is not private.
• Check whether the free offer is permanent, limited, or promotional. Free plan, free trial, guest access, and institution-paid access are not interchangeable.
• Check whether the route is solving your real problem. A free browser chat is not a business automation stack, and an API trial is not a normal end-user chatbot experience.

That is the whole game. The best free route is not the route with the loudest promise. It is the route that still works when you come back next week and that still makes sense after you look at the limits page.

When Free ChatGPT Stops Being the Right Tool and a Chatbot Platform Starts Making More Sense

If you are reading this as a marketer, agency owner, or small business operator, there is a point where squeezing more out of free GPT chat becomes the wrong optimization entirely.

A free personal assistant helps you draft answers, summarize tickets, or brainstorm. A customer-facing chatbot has a different job: answer inbound messages on Facebook Messenger, handle Instagram DMs, run website chat, route people into forms, collect lead info, push users into the right flow, and hand off cleanly to a human.

That is where a platform like MessengerBot belongs. The useful architecture is simple:

• Use free ChatGPT or another AI assistant to prototype language and FAQs.
• Use a chatbot platform to control channels, triggers, forms, menus, and handoff.
• Use a grounded GPT layer only where free text actually helps the user.

Trying to run customer messaging out of a consumer AI tab is how teams end up with great demo replies and weak operations. If that is the stage you are reaching, stop comparing personal free plans and start comparing deployment paths. 查看 MessengerBot 價格 when you want the current plan breakdown, then 瀏覽我們的教程 if you want the setup path rather than another model comparison article.

Sources and References

• OpenAI ChatGPT Free Tier FAQ for current Free-plan capabilities, GPT access, and rate-limit behavior.
• OpenAI ChatGPT home page article for logged-out use, one-chat limit, and training defaults.
• OpenAI ChatGPT release notes for the April 30, 2025 retirement of GPT-4 and the February 13, 2026 retirement of GPT-4o and GPT-4.1 in ChatGPT.
• OpenAI billing settings in ChatGPT vs Platform for API billing separation and the Explore free-trial plan.
• OpenAI Researcher Access Program for up to $1,000 in API credits and quarterly review timing.
• OpenAI GPT-5.4 announcement for current API pricing context.
• OpenAI GPT-5.4 mini and nano announcement for Free and Go access to GPT-5.4 mini through Thinking.
• OpenAI GPT-3.5 Turbo model page for legacy status and the recommendation to use newer mini models instead.
• OpenAI GPT-4.1 announcement for GPT-4.1 API context.
• OpenAI gpt-oss FAQ for Apache 2.0 licensing, compatibility, and non-API availability.
• OpenAI ChatGPT Education for institution-paid access and higher-limit workspaces.
• Apple Support: Use ChatGPT with Apple Intelligence for account-free setup and privacy behavior.
• DuckDuckGo Duck.ai chat models for current free-model availability.
• DuckDuckGo Duck.ai privacy for anonymization and metadata handling.
• DuckDuckGo Duck.ai recent chats for current chat-history behavior.
• DuckDuckGo Duck.ai usage limits for daily-limit details.
• Google Gemini Apps limits and upgrades for current free quotas and feature caps.
• Anthropic pricing 並 Anthropic free Claude usage help for Claude Free plan details and five-hour reset behavior.
• Perplexity account management and security for free-account benefits and limits.
• Microsoft Copilot experiences for signed-out access and sign-in benefits.