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How to Use ChatGPT 4.5 for Free in 2025 (Step-by-Step Guide)

how to use ChatGPT 4.5 for free

ChatGPT 4.5 is one of the most powerful AI models available in 2025. It’s faster, smarter, and more capable than older versions like GPT-3.5.

But here’s the catch:
To use GPT-4.5 directly on OpenAI’s ChatGPT website, you need a Plus subscription ($20/month).

So, what if you want to use it for free?

The good news is — you can!
Several trusted platforms give you free access to GPT-4.5 or its capabilities without needing a subscription.

In this guide, you’ll learn:

Let’s get started


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What Is ChatGPT 4.5 and Why It Matters

ChatGPT 4.5 is a turbocharged version of GPT-4. It’s faster, more reliable, and designed for multi-modal input (text, image, voice, files).

Here’s what makes GPT-4.5 special:

But officially, it’s locked behind the ChatGPT Plus paywall.
That’s why so many users are searching:
“How to use GPT-4.5 for free in 2025?”

Keep reading. We’re breaking it down.


✅ Method 1: Use GPT-4.5 for Free via Microsoft Copilot (Bing Chat)

Website: https://copilot.microsoft.com

Microsoft Copilot is the easiest and most powerful way to use GPT-4.5 features completely free.

How to Use:

  1. Open copilot.microsoft.com in Edge or Chrome

  2. Sign in with a Microsoft account (free)

  3. Ask anything — it’s powered by GPT-4 turbo (same base as 4.5)

  4. Use voice input, images, or follow-up questions with no limit

⚡ Why It’s Great:

Sample Prompt:

“Write a 500-word blog post in a casual tone about AI tools for YouTube creators.”

Limitations:


✅ Method 2: Use ChatGPT 4.5 for Free via Poe.com (by Quora)

Website: https://poe.com

Poe lets you access AI bots like GPT-3.5, GPT-4, Claude, and more — all in one place.

How to Use:

  1. Visit poe.com

  2. Sign up with Google, Apple, or email

  3. Use bots labeled “ChatGPT”, “GPT-4”, or “Assistant”

  4. Ask questions, write content, or get summaries

⚡ Why It’s Great:

Tips:

Limitations:


✅ Method 3: ChatGPT Mobile App (Free Tier + Explore GPTs)

Available On: Android & iOS

App Name: “ChatGPT” by OpenAI

How to Use:

  1. Download the ChatGPT app from Google Play or App Store

  2. Sign in with your OpenAI account

  3. Tap “Explore GPTs” to find custom bots

  4. Some free GPTs use GPT-4.5 on the backend

⚡ What You Get:

Limitations:


Platform Comparison: Best Free Ways to Access ChatGPT 4.5 (Part 1)

Platform GPT-4.5 Access Supports Images File Upload Daily Limit Cost
Microsoft Copilot ✅ Yes ✅ Yes ❌ No Unlimited 100% Free
Poe.com ✅ Limited ❌ No ❌ No 10–15 uses Free
ChatGPT App ⚠️ Sometimes ✅ Yes ⚠️ Limited Yes Free Tier

✅ Method 4: Try GPT-4.5 via You.com AI Chat

Website: https://you.com/chat

You.com is a search engine powered by AI. It includes chat support built with GPT-4 capabilities — available even for free users.

How to Use:

  1. Go to you.com/chat

  2. Type your query or command

  3. Select “Smart Mode” (uses GPT-4 features)

  4. Get responses in real-time

⚡ Why It’s Great:

  • GPT-4 capabilities in search + chat

  • Built-in summarizer, writing tool, and code helper

  • No account needed for basic use

Limitations:

  • Some advanced tools are Pro-only

  • No file or image input yet


✅ Method 5: Use GPT-4.5 on Writesonic (Free Trial)

Website: https://writesonic.com

Writesonic offers AI writing tools using GPT-4.5 via API. They provide a free trial with enough credits to test it out.

How to Use:

  1. Create a free account at writesonic.com

  2. Choose “GPT-4” in the settings (default may be GPT-3.5)

  3. Use tools like AI Article Writer, Sonic Editor, or Chatsonic

⚡ Key Features:

  • Content creation powered by GPT-4.5

  • Templates for blogs, ads, landing pages, and social media

  • Includes AI image generator, voice search, and real-time data

Limitations:

  • Credit-based free trial

  • Requires upgrade for longer content generation


✅ Method 6: Use GPT-4.5 in Perplexity.ai

Website: https://perplexity.ai

Perplexity is an AI-powered search engine that answers queries like a chatbot using powerful models like GPT-4-turbo.

How to Use:

  1. Go to perplexity.ai

  2. Type your question (e.g., “Summarize this research paper”)

  3. Select “Pro Search” to unlock GPT-4 turbo mode

⚡ Why It’s Great:

  • Clean interface

  • No login required for basic use

  • Supports citations and sources

Limitations:

  • No file uploads or image support

  • Pro search is limited for free users


✅ Bonus: Use GPT-4.5 via Ora.ai

Website: https://ora.ai

Ora.ai lets you create or use AI chatbots powered by models like GPT-4.5.

How to Use:

  1. Visit ora.ai

  2. Use existing bots or create your own

  3. Choose GPT-4 if available

⚡ Why It’s Useful:

  • Build your own custom AI chatbot

  • Embed chatbots on websites

  • Supports API integrations

Limitations:

  • Some models are limited to Pro users

  • Limited custom prompt memory for free tier


Free ChatGPT 4.5 Access Platforms – Comparison Table (Part 2)

Platform GPT-4.5 Access Content Type Best Use Case Cost Limits
You.com ✅ Yes Text only Fast answers, summaries Free Some tool limits
Writesonic ✅ Trial Text, images AI writing, marketing Free trial Credit-based
Perplexity.ai ✅ Limited Text Academic answers, research Free Pro search cap
Ora.ai ✅ Sometimes Chatbots Custom AI bot creation Free Pro-only options

How to Confirm You’re Using GPT-4.5 (or GPT-4-Turbo)

Some tools don’t clearly label which model is running in the background. But here’s how you can tell:

Signs You’re Using GPT-4.5:

Feature GPT-3.5 GPT-4.5 (Turbo)
Handles long conversations ❌ Often forgets ✅ Maintains context
Supports images ❌ No ✅ Yes (on supported tools)
Faster & more accurate ❌ Slower, basic ✅ Fast + nuanced answers
More creative writing ⚠️ Sometimes ✅ Consistently high-quality
Understands file data ❌ Not supported ✅ (Only on OpenAI Plus)

Prompt Example to Ask:

“Which version of ChatGPT are you using right now?”

If the AI replies with GPT-4 turbo, GPT-4.5, or OpenAI API model, then you’re using the advanced model.


Smart Tips to Use ChatGPT 4.5 Like a Pro (For Free)

Here are expert tricks to make the most of free tools:

✅ Use Clear, Layered Prompts

Break down tasks into smaller steps.
Example:

“First, give me an outline. Then write the intro. Keep tone casual.”

✅ Save Prompts for Reuse

Use tools like Notion, Google Docs, or Prompt folders to keep:

  • Prompts for content writing

  • Coding helpers

  • SEO outlines or ad copy generators

✅ Try Multi-Platform Workflows

  • Use Copilot for quick research

  • Use Writesonic for content

  • Use Perplexity for citations


What You Can’t Do (in Free Versions)

Even the best free GPT-4.5 access tools have limits:

Feature Free Access Notes
File Upload ❌ Mostly No Only in ChatGPT Plus
Custom GPTs ❌ Limited Requires OpenAI subscription
Unlimited Usage ⚠️ Varies Poe, Perplexity have daily caps
Access All APIs ❌ No Paid access needed for full use

‍ How to Use GPT-4.5 for Coding (Without Paying)

ChatGPT 4.5 isn’t just for chatting — it’s also a powerful coding assistant.

If you’re a developer, student, or beginner, you can use GPT-4.5 to:

  • Debug code

  • Generate scripts

  • Learn programming concepts

  • Build small apps and automation

Here’s how to do it without a subscription


✅ 1. Use Microsoft Copilot for Coding Tasks

Best For: Debugging, small code snippets, explaining code

Prompt Example:

“Fix this Python code and explain what it does: [Paste your code]”

Pro Tip: Ask Copilot to compare different coding methods or optimize a block of code.


✅ 2. Use GPT-4.5 on Cursor.sh (Free Plan Available)

Website: https://www.cursor.sh

Cursor is a GPT-4-powered code editor, perfect for developers.

Features:

  • VS Code-like interface

  • Built-in GPT-4 assistant

  • Bug fixing, commenting, and refactoring tools

Limitations: You need to verify your email. Free plan gives limited monthly usage of GPT-4.


✅ 3. Try Codeium (GPT-Powered)

Website: https://codeium.com

Codeium is a GPT-like autocomplete tool that integrates with many IDEs like VS Code, JetBrains, and more.

Key Features:

  • GPT-style coding suggestions

  • Free for personal use

  • Works offline and online

Bonus: Supports over 70+ programming languages!


How to Use ChatGPT 4.5 for Content Creation (Free Tools)

Whether you’re a blogger, YouTuber, student, or freelancer, GPT-4.5 can help you create high-quality content in less time.

Here are the best ways to use it for free:


✅ 1. Use Writesonic for Articles and SEO

Writesonic uses GPT-4.5 (API) to generate:

  • Blog posts

  • Social media ads

  • Product descriptions

You get 10K words/month free on trial.

Prompt Example:

“Write a 1000-word blog post about AI in education in 2025 with an SEO-friendly structure.”


✅ 2. Use You.com for AI Writing

YouWrite (part of You.com) helps you write:

  • Emails

  • Articles

  • Social media captions

All generated using GPT-4-based chat. No signup needed.


✅ 3. Use Microsoft Copilot for Quick Writing Tasks

Great for:

  • Writing outlines

  • Editing drafts

  • Rewriting in different tones

Example Prompt:

“Make this sentence more professional: ‘I want to work here because it’s cool.’”


Use GPT-4.5 for Learning and Studying (Free Tools for Students)

AI is revolutionizing education. You can now study smarter using GPT-4.5 — even without paying.

Here’s how


✅ 1. Use Perplexity.ai for Research

Ask complex questions, and it replies with short answers and real-time citations.

Use Case:

“Summarize the key points of the latest AI in education research paper from 2025.”

Bonus: Use “Pro Search” to access GPT-4-level answers.


✅ 2. Use ChatGPT App (Free GPTs) for Study Help

Inside the ChatGPT app (free version), explore GPTs for students, like:

  • Essay helpers

  • Homework tutors

  • Math solvers

Some of them use GPT-4.5 for better explanations.


✅ 3. Try SciSpace (AI for Academics)

Website: https://scispace.com

Best For:

  • Explaining scientific papers

  • Breaking down formulas

  • AI-powered summaries

Free version gives GPT-powered insights into academic papers.


GPT-4.5 Free Use: Tools by Use Case

Use Case Tool/Platform GPT-4.5 Access Notes
Coding Copilot, Cursor.sh ✅ Yes Debug, explain, generate code
Blogging/SEO Writesonic, You.com ✅ Trial/Free Article generation, copywriting
Studying/Research Perplexity, SciSpace ✅ Partial Summary, citation, AI tutoring

Smart Prompting Tips (Free Users)

Using free tools doesn’t mean low quality. If you use smart prompts, you can get premium-level answers.

Here’s how to write prompts that unlock GPT-4.5’s full potential:


Prompt Templates:

  1. “Act as a [role] and [task]”
    Example: “Act as a YouTube Shorts expert and write 5 viral hook ideas.”

  2. “Explain like I’m 10 years old”
    Useful for: Math, science, technical concepts

  3. “Give me bullet points only”
    Best for: Summarization and productivity

  4. “Give me pros and cons with table format”
    Boosts clarity and structure

  5. “First write an outline, then write section by section”
    Great for blog and essay generation

Final Summary: Use GPT-4.5 for Free (Yes, It’s Possible!)

You don’t need a ChatGPT Plus subscription to access the power of GPT-4.5 in 2025.

Thanks to integrations with Microsoft, You.com, Poe, and others, you can now:

  • Chat, write, and code

  • Summarize and research

  • Create content and study smarter

All using GPT-4.5 or turbo-level models, completely free.

Even without file uploads or custom GPTs, these tools are more than enough for 90% of users.


️ Ultimate Comparison Table: GPT-4.5 Free Access (All Tools)

Platform GPT-4.5 Access Best For File Support Image Input Daily Limit Free?
Copilot (Microsoft) ✅ Yes Writing, Coding, Research ❌ No ✅ Yes Unlimited ✅ 100%
Poe (Quora) ✅ Limited Q&A, Chat, Summarizing ❌ No ❌ No 10–15 msgs ✅ Free
ChatGPT App (OpenAI) ⚠️ Sometimes GPTs, Voice, Images ⚠️ Limited ✅ Yes Limited ✅ Free
You.com ✅ Yes Search + Content Writing ❌ No ✅ Yes Unlimited ✅ Free
Writesonic ✅ Trial Blog writing, SEO tools ❌ No ✅ Yes Credit-based ✅ Free trial
Perplexity.ai ✅ Limited Research, Study Help ❌ No ❌ No Pro cap ✅ Free
Cursor.sh ✅ Trial Code writing/debugging ✅ Yes ❌ No Usage limit ✅ Free tier
Codeium ✅ Yes Auto-complete coding ❌ No ❌ No Unlimited ✅ Free
Ora.ai ✅ Partial Create custom GPT bots ❌ No ❌ No Variable ✅ Free
SciSpace ✅ Partial Scientific paper summaries ❌ No ❌ No Unlimited ✅ Free

FAQ: ChatGPT 4.5 Free Access in 2025

❓Q1: Can I really use GPT-4.5 without paying?

Yes, many platforms now integrate GPT-4.5 or GPT-4 turbo features for free — including Microsoft Copilot, Poe.com, You.com, and Writesonic’s trial version.


❓Q2: Is GPT-4.5 better than GPT-3.5?

Absolutely. GPT-4.5:

  • Understands long prompts better

  • Maintains context longer

  • Can process images

  • Gives more creative and factual answers


❓Q3: How do I know if I’m using GPT-4.5?

Ask it:

“Which model are you based on?”
Or check performance: If it understands long context and handles images, it’s likely GPT-4.5 or GPT-4 turbo.


❓Q4: What are the best free platforms right now?

Here’s the ranking for 2025:

  1. Microsoft Copilot (best overall)

  2. Poe.com (great interface + variety)

  3. You.com (search + writing assistant)

  4. Writesonic (writing tools with trial)

  5. Cursor.sh (coding with GPT-4)


❓Q5: Can I upload files or images with the free version?

In most tools — no. File upload is limited to ChatGPT Plus on OpenAI’s site.
But you can paste text or images directly in Copilot and still get great results.


Final Tips Before You Go

  1. Bookmark Copilot, Poe, and You.com
    They’re the easiest ways to use GPT-4.5 right now.

  2. Use structured prompts
    Clear prompts = better answers.

  3. Test across platforms
    Use Copilot for code, You.com for content, and Perplexity for research.

  4. Don’t fall for scams
    Never download unknown “GPT-4.5 APKs” or apps — they could steal your data.

Conclusion

ChatGPT 4.5 is powerful — and with the right tools, you can enjoy it 100% free.

Whether you’re a content creator, developer, student, or just curious, this guide showed you how to:

  • Access GPT-4.5 across multiple platforms

  • Use it for writing, coding, and research

  • Avoid the paywall and still get top results

Now go ahead and try it — and share this guide with someone who needs it!

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