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| What matters | 🧠 Claude | 🤖 ChatGPT | 📖 Grammarly |
|---|---|---|---|
| What it does | Anthropic's AI assistant for research, writing, code, files, and connected tasks, with free and paid plans. | OpenAI's AI assistant for writing, coding, research, file analysis, and connected work across chats and projects. | AI writing assistance for grammar, clarity, tone, and text generation across supported documents, apps, and browsers. |
| Best for | Research, documents, coding, and connected knowledge work | Writing, research, coding, and file-based tasks in one assistant | Grammar, clarity, and writing feedback in everyday apps |
| Pricing model | Free plan + paid | Free plan + paid | Free plan + paid |
| Free-plan limits | Free usage is limited. Pro is $20/month or $200/year; Max starts at $100/month. Model, context, and task limits vary by plan. | Free is $0 with unlimited text chats on GPT-6 under abuse guardrails, plus limited uploads, image creation, voice, deep research and Codex access. Go is $8 a month and may include ads, Plus is $20, and Pro starts at $100 with three usage tiers. | A Free plan is available. Pro and Enterprise add advanced writing and team features; a Pro trial is temporary. |
| Platforms | Web, macOS, Windows, iOS, Android | Web, macOS, Windows | Web |
| Key capabilities | Web search Artifacts File creation and code execution App connections Conversation memory | Projects and chats Web search File and image inputs Voice conversations Connected tools and plugins | Grammar and spelling checks Clarity suggestions Tone guidance AI writing assistance Desktop and browser support |
| Strengths | Useful when you want to iterate on a draft against supplied context. | Keeps drafting and follow-up questions in one conversation. | Review suggested corrections in context and accept only changes that match your voice and intended meaning. |
| Limitations | Free usage is limited. Pro is $20/month or $200/year; Max starts at $100/month. Model, context, and task limits vary by plan. A polished reply still needs a policy check; fluent wording does not establish entitlement. Claude Cowork needs a paid plan, and Claude Duet is a US-only waitlisted preview for Pro and Max subscribers | The ChatGPT Free plan includes limited image creation. Uploads and other advanced features have plan-dependent allowances. API billing is separate; check current account availability and provider pricing. For tightly bounded evidence, give it source text instead of relying on recollection. | A Free plan is available. Pro and Enterprise add advanced writing and team features; a Pro trial is temporary. |
| No signup required | Not verified | Not verified | Not verified |
| No credit card required | Not verified | Not verified | Not verified |
| Open source | Not verified | Not verified | Not verified |
| Free trial | Not verified | Not verified | Not verified |
| Access details reviewed | 2026-10-29 | 2026-10-15 | 2026-10-06 |
| Official pricing / source | Check pricingAccess source | Check pricingAccess source | Check pricingAccess source |
| Next step | Explore Claude | Explore ChatGPT | Explore Grammarly |