ChatGPT Free vs Go vs Plus vs Pro: Limits & Best Plan

Free, Go, Plus and Pro at a glance

• Free ($0) is suitable for everyday general knowledge, casual writing, search synthesis, and lightweight coding assistance. Free includes unlimited text chats with GPT-6 Luna (rolling out to Free from 2026-10-08) and access to GPT-5 Thinking Mini, with limited uploads, slower image generation, limited voice chats, limited deep research, and limited Codex and ChatGPT Work access in the desktop app, where it can use GPT-5.6 Terra.
• Go ($8/mo) is the lowest-cost paid step. Like Free, it chats with GPT-6 Luna; it adds more messages with tools, more uploads, more image creation and voice chats, and longer memory, and keeps Free's limited GPT-5.6 Terra access in ChatGPT Work and Codex on desktop. OpenAI notes that Go may include ads.
• Plus ($20/mo) remains the standard individual benchmark for professionals, developers, and researchers. Plus adds GPT-6.1 Sol and the GPT-6 models (Astra, Sol and Luna), GPT-5.6 Sol, Terra and Luna, legacy models, expanded deep research, projects, scheduled tasks and custom GPTs, expanded Codex usage, and ChatGPT Work on desktop, web and mobile.
• Pro (from $100/mo) is a high-usage tier built for engineering leads, quantitative researchers, and heavy daily operators. Pro provides more usage than Plus, Pro reasoning powered by GPT-6 Astra, GPT-5.6 Sol Pro, longer Codex and ChatGPT Work sessions, Dot (OpenAI's always-on agent), maximum Codex tasks, unlimited and faster image creation, and maximum deep research. Pro comes in three monthly tiers: Pro 100 ($100), Pro 200 ($200, more usage than Pro 100) and Pro 500 ($500, the highest included usage, with Ultrafast for GPT-6 Astra and GPT-6.1 Sol). Pro 200 reopened to new subscriptions on 2026-09-29 with a lower included allowance than before.

None of the ChatGPT subscriptions cover OpenAI developer API usage. API calls made with developer keys on platform.openai.com are billed separately on a metered per-token basis.

Full tier comparison matrix

The table below outlines the core differences across pricing, model access, context, and research tools for the four personal ChatGPT subscription tiers.

Model availability and usage headroom

Free tier: everyday chat with GPT-6 Luna

The Free plan provides unlimited text chats with GPT-6 Luna (rolling out to Free from 2026-10-08), subject to OpenAI's abuse guardrails, plus access to GPT-5 Thinking Mini for lighter reasoning. Uploads, image generation, voice, deep research, memory, and Codex are limited, and the GPT Instant context window is 27K tokens. Free does not include GPT-6.1 Sol, GPT-6 Sol, GPT-6 Astra or the GPT-5.6 models in Chat; its only GPT-5.6 access is limited GPT-5.6 Terra in Work and Codex on desktop.

Go tier: the low-cost paid step

Go costs $8 per month in the US. It raises Free's limits on messages with tools, uploads, image creation, and voice, extends memory, and doubles the GPT Instant context window to 54K. Its Chat uses GPT-6 Luna, like Free, and its Work and Codex access on desktop is the same limited GPT-5.6 Terra; GPT-6.1 Sol and Astra need Plus or higher, and OpenAI notes that the plan may include ads. ChatGPT Go vs Plus compares the two paid steps in detail.

Plus tier: the professional daily driver

Plus at $20 per month adds GPT-6.1 Sol and the GPT-6 models (Astra, Sol and Luna) alongside GPT-5.6 Sol, Terra and Luna and legacy models. Plus subscribers get a 256K reasoning context window, expanded deep research and memory, projects, scheduled tasks and custom GPTs, expanded Codex usage, and ChatGPT Work on desktop, web, and mobile.

Pro tier: high-usage reasoning

Pro starts at $100 per month and is designed for users whose professional productivity is bottlenecked by Plus limits:

• Pro reasoning: Pro reasoning powered by GPT-6 Astra and GPT-5.6 Sol Pro can spend more compute on complex mathematical proofs, deep architectural refactorings, and multi-file debugging.
• More usage: Pro includes more usage than Plus, rising from Pro 100 to Pro 500, with a 128K Instant and 400K reasoning context window, so heavy research and constant coding sessions can proceed without pause. ChatGPT context window by plan lists the Instant and reasoning windows for every plan.
• Deep research and Codex: Pro grants maximum deep research capacity and maximum Codex tasks.

Projects, data analysis, and voice capabilities

Projects and custom GPTs

Plus adds projects, scheduled tasks, and custom GPTs, which keep files, instructions, and recurring work in one place instead of repeatedly pasting context into new chats. Pro expands the same features with higher limits.

Data analysis and document handling

Uploading spreadsheets, PDF whitepapers, and code archives relies on file uploads and data analysis.

• Free users get limited uploads and limited data analysis.
• Go, Plus, and Pro subscribers share one upload rate, while Pro adds more files per project and longer context for analyzing large files, generating charts, and producing downloadable assets; ChatGPT file upload limits by plan lists the exact limits.

The subscription vs API boundary

OpenAI Billing Separation

Paying $20/month for Plus or $100 or more per month for Pro never covers API usage. If you intend to use Claude Code, Cursor, Devin Desktop, or custom developer scripts that require an sk-... API key, those tokens are invoiced separately on the OpenAI API developer dashboard. Conversely, having $50 in prepaid API credits will not unlock ChatGPT Plus features on the web interface.

Business and enterprise workspace considerations

For organizations deploying ChatGPT across multiple team members, personal Plus or Pro accounts introduce compliance, privacy, and billing overhead.

• ChatGPT Business ($25/user/mo monthly or $20 annual, formerly ChatGPT Team): Adds a secure workspace for 2 to 200 users with SAML SSO, centralized billing and administration, shared GPTs, workspace agents, and no training on business data by default.
• ChatGPT Enterprise: Provides SCIM user provisioning, enterprise key management, domain verification, role-based access controls, custom data retention, data residency, and an expanded context window. Its pricing is custom; ChatGPT Enterprise pricing covers what OpenAI does publish.

If privacy compliance or centralized billing is mandatory, a Business workspace is preferable to reimbursing multiple personal Plus accounts. ChatGPT Plus vs Business compares the two seat by seat.

Cheaper official routes

Go, at $8 a month, is OpenAI's own budget tier, and every personal plan is billed monthly with no annual price. Beyond Go, OpenAI publishes a few targeted offers rather than general discounts:

Source: OpenAI's ChatGPT pricing page and its student offer help articles, checked October 11, 2026.

Decision checklist: which plan should you buy?

Use this decision boundary to select the appropriate tier:

1. Stay on Free ($0) if you primarily ask conversational questions, summarize standard articles, generate occasional basic images, and do not rely on ChatGPT for time-critical professional deliverables.
2. Choose Go ($8/mo) if you want more messages, uploads, image creation, and memory than Free on a tight budget and do not need the GPT-6 models.
3. Upgrade to Plus ($20/mo) if you write software, conduct professional research, analyze spreadsheets, or want the GPT-6 models, projects, ChatGPT Work on every device, and expanded Codex usage. Plus represents the optimal cost-to-capability ratio for most knowledge workers.
4. Invest in Pro (from $100/mo) only if your workflow actively hits Plus limits multiple times per week, you need Pro reasoning powered by GPT-6 Astra for mission-critical engineering or mathematical research, or you run intensive deep research regularly.