ChatGPT Review
The most versatile AI assistant, now powered by GPT-5.6 Sol and Luna — from writing and coding to deep research and autonomous agents.
At a Glance
Overview
ChatGPT is the AI assistant that started it all. Launched by OpenAI in November 2022, it introduced mainstream users to conversational AI and hasn't looked back. As of August 2026, ChatGPT has evolved through six major model generations. The current lineup centers on two models: GPT-5.6 Sol (the unified flagship — handles both instant responses and deeper reasoning via an effort slider, launched August 6, 2026; available on Plus and Pro) and GPT-5.6 Luna (the fast default for Free and Go tiers, also launched August 6, 2026 — unlimited text chats with a Think button for harder questions). GPT-5.6 Sol replaces the separate GPT-5.5 Instant, GPT-5.5 Thinking, and GPT-5.5 Pro models that preceded it. OpenAI retired the GPT-4 and GPT-4o models from ChatGPT in early 2026, and o3-pro is scheduled for retirement on August 26, 2026, completing the transition to the GPT-5.6 family.
With over 400 million weekly active users, it is by far the most widely used AI chatbot. The free tier now gives you unlimited text chats with GPT-5.6 Luna plus a Think button for harder questions, while ChatGPT Plus ($20/month) unlocks GPT-5.6 Sol with the effort slider, higher usage limits, file uploads, image generation, Codex for coding, and Deep Research. The Go plan ($8/month) fills the gap for budget-conscious users who want more than free but don't need the full Plus feature set.
For people who need an AI assistant that can write emails, debug code, brainstorm ideas, research topics, and explain complex concepts in plain English — ChatGPT is still the default choice in 2026. The effort slider is a smart design move: one model, one interface, depth on demand. But with competitors like Claude and Gemini catching up fast, the gap has narrowed considerably.
Key Features
- GPT-5.6 model family — GPT-5.6 Sol (unified flagship, Plus and Pro — handles both instant responses and deeper reasoning via an effort slider; launched August 6, 2026) and GPT-5.6 Luna (fast default for Free and Go tiers, unlimited text chats with a Think button). The effort slider replaces the old separate Thinking model — drag it up for harder problems, keep it low for quick answers. GPT-5.6 Sol also adds Ultrafast mode (14x speed, API preview as of August 13, 2026). The GPT-4 era is officially over in ChatGPT, and o3-pro retires on August 26, 2026.
- Codex — OpenAI's coding agent is now generally available, with terminal access, file I/O, and multi-file project understanding. Write features, fix bugs, navigate codebases, and propose pull requests. Available on Plus, Pro, Business, and Enterprise. New in 2026: @Codex in Slack (invoke Codex from any Slack thread), the Codex SDK (embed Codex in your own apps), new admin tools, and Record & Replay on the macOS Codex app (Business tier, June 18, 2026) — record a workflow once and turn it into a reusable skill.
- 400K context window — process massive documents, entire codebases, or book-length content in a single conversation. Pro users get 400K reasoning context; Codex supports up to 1M tokens.
- Deep Research — autonomous multi-step research that browses the web, synthesizes findings, and produces cited reports. A game-changer for analysts and researchers (Plus and above).
- Agent Mode — ChatGPT can now complete multi-step tasks autonomously: book flights, manage calendars, fill out forms, and interact with websites. Available on Pro and Enterprise tiers.
- Multimodal input — upload images, PDFs, spreadsheets, and documents; ChatGPT reads, analyzes, and reasons about all of them in a single conversation.
- Custom GPTs + Projects — create purpose-built AI assistants for specific tasks, organize conversations into projects, and set recurring tasks. Google Drive integration in Library launched August 13, 2026 for seamless file access. Available on Plus and above.
- ChatGPT Images 2.0 — state-of-the-art image generation with 2K resolution, native text rendering, and a reasoning step that interprets prompts before generating. Launched April 2026, replacing DALL-E entirely. Available on Plus and Pro tiers (limited on free).
- For developers — Beyond the consumer app: the Agents SDK for building agentic apps, Background Mode for long-running tasks, a Deep Research API for programmatic access, and Ultrafast mode (14x speed, API preview August 13, 2026). GPT-5.6 Sol is available in the API.
- Voice and vision — real-time voice conversations with natural speech, plus the ability to analyze photos, screenshots, and live camera input.
- Memory and personalization — ChatGPT remembers preferences and context across conversations, with user control over what's stored and when to forget (Plus feature).
Pricing
ChatGPT's pricing has evolved significantly in 2026, with five consumer tiers and two business plans. The free tier is now genuinely generous — you get unlimited text chats with GPT-5.6 Luna plus a Think button for harder questions, web browsing, and basic voice features. It's enough for casual users who ask questions throughout the day without hitting artificial caps.
Paid tiers unlock progressively more:
- ChatGPT Go ($8/month) — Budget tier introduced in 2026. GPT-5.6 Luna with the Think button, higher message limits than free, basic file uploads, and web browsing. No Codex or Deep Research. Best for students and light users who want more than the free tier.
- ChatGPT Plus ($20/month) — The sweet spot. Full GPT-5.6 Sol access with the effort slider (instant responses or deep reasoning, your choice), Codex for coding, Deep Research, ChatGPT Images 2.0, 400K context in Codex, Custom GPTs, file uploads, and priority access during peak times. This is what most professionals should get.
- ChatGPT Pro ($200/month) — Unlimited access to everything: GPT-5.6 Sol at maximum effort, Agent Mode for autonomous task completion, maximum Deep Research queries, expanded memory, and early access to research previews. Built for power users: developers, researchers, and executives.
- Business ($20/seat/month, annual) — Team workspace with admin controls, shared Custom GPTs, usage analytics, and Codex access. Pricing dropped from $25 to $20 per seat in April 2026.
- Enterprise — Custom pricing with SSO, data encryption, dedicated support, audit logs, and usage analytics. For organizations with compliance and security requirements.
For most individual users, the $20 Plus plan hits the sweet spot between capability and cost. The Go plan at $8/month is worth considering if you mainly use ChatGPT for writing and light research but hit free-tier limits regularly. Pro at $200/month only makes sense if you're doing heavy coding, deep research daily, or need Agent Mode for workflow automation.
Pros
- GPT-5.6 Sol is the most capable consumer AI model available — the effort slider lets you trade speed for depth on any query, and benchmarks lead across reasoning, coding, and creative tasks
- Free tier gives you unlimited GPT-5.6 Luna text chats at zero cost — genuinely usable for everyday work
- Codex is a legitimate coding agent that can navigate codebases, fix bugs, and propose PRs
- Deep Research produces genuinely useful multi-page cited reports from web research
- 400K context window handles enormous documents and codebases without splitting
- Multimodal capabilities are best-in-class: text, images, PDFs, spreadsheets, and voice in one interface
- Available on every platform: web, iOS, Android, macOS, Windows, plus API access
- Custom GPTs and Projects let you build specialized assistants and organize work into persistent workspaces
- Go plan at $8/month makes ChatGPT accessible to budget-conscious users who need more than free
- Regular model updates — GPT-5.6 Sol and Luna dropped in August 2026, and OpenAI ships improvements monthly
Cons
- Pro at $200/month is steep — only worth it for heavy daily users
- Rate limits on Plus can still be frustrating during heavy use (slower fallback models, cooldowns)
- The effort slider at high settings can be slow — you trade speed for reasoning depth on complex queries
- Can be confidently wrong on technical or niche topics — Deep Research helps but fact-checking is still required
- Privacy concerns: conversations may be used for training by default (requires manual opt-out in settings)
- Competitors are closing the gap — Claude matches or beats ChatGPT on long-form writing, and Gemini has stronger Google ecosystem integration
- Occasional downtime during peak usage or model updates
Use Cases
Verdict
ChatGPT is still the AI assistant to beat in 2026. The free tier now offers unlimited GPT-5.6 Luna text chats — enough for anyone to see the value — and the $20/month Plus plan unlocks GPT-5.6 Sol with the effort slider, a genuinely powerful productivity tool. The multimodal capabilities, massive context window, and third-party integrations give it an edge that competitors are still chasing.
That said, it's not perfect. Rate limits on the Plus tier can annoy power users, occasional factual errors demand verification, and the Pro tier's $200/month price tag puts it out of reach for casual users. If you're comparing tools, Claude edges ahead on long-form writing quality and Perplexity wins at research — but ChatGPT remains the best all-arounder.
For most people who want a single AI tool that does everything reasonably well, ChatGPT is the right place to start.
Frequently Asked Questions
Is ChatGPT free?
Yes, the free tier gives you unlimited text chats with GPT-5.6 Luna (OpenAI's default since August 6, 2026) plus a Think button for harder questions. ChatGPT Plus costs $20/month for GPT-5.6 Sol with the effort slider, higher limits, Codex, Deep Research, ChatGPT Images 2.0, and priority access. There's also a Go plan at $8/month for budget-conscious users.
Which ChatGPT model should I use?
If you're on Free or Go, GPT-5.6 Luna is your default — fast and unlimited for everyday questions. Tap the Think button when you need deeper reasoning. If you're on Plus or Pro, GPT-5.6 Sol handles everything via the effort slider: keep it low for quick answers, drag it up for complex reasoning, long-form writing, coding, and research. Most users should keep the slider low for speed and only crank it up when they need more depth.
Can ChatGPT browse the internet?
Yes, web browsing is available on all tiers including free (with limits). It can search for real-time information, current events, and recent data. Plus and Pro users get more browsing queries per day and access to Deep Research, which autonomously researches topics and produces cited reports.
Does ChatGPT store my conversations?
By default, OpenAI may use your conversations to improve models unless you opt out in settings. You can disable chat history and model training in your account settings. Enterprise plans have stronger data privacy guarantees with no training on your data.
Should I use ChatGPT or Claude?
ChatGPT is more versatile — Codex for coding, Deep Research, multimodal input, image generation, and Agent Mode give it a broader toolkit. Claude excels at long-form writing with a more natural, nuanced tone. If you need an all-in-one tool with the best coding support, go with ChatGPT. If your primary use is writing, analysis, and document work, Claude is worth a serious look — the gap in writing quality is real.
Can ChatGPT generate images?
Yes, via ChatGPT Images 2.0 (launched April 2026, replacing DALL-E entirely). This new model generates 2K-resolution images with accurate text, multilingual support, and a reasoning step that interprets prompts before creating. Available on Plus and Pro plans, with limited access on free. Go users do not get image generation.