ChatGPT free is the better all-rounder in 2027: unlimited text chat, file uploads and limited image generation on a default model. Gemini free counters with a 32K context window and search grounding, but since October 2026 free users are restricted to the weakest Flash-Lite model.
How we compared the free tiers
Free-tier limits move constantly, so this comparison is built from the published plan pages and help documentation of both services as checked in October 2026, cross-referenced against independent limit testing. Two big events shape the 2027 picture: OpenAI's summer 2026 overhaul, which made everyday text chat unlimited on ChatGPT free, and Google's October 2026 model reshuffle, which pushed free Gemini users down to the smallest Flash-Lite model. Because Google and OpenAI both adjust caps without much fanfare, treat every number below as a snapshot and check the official site before relying on it.
If you are new to these tools, our AI chatbots hub covers the whole free landscape, from no-sign-up options to specialist assistants.
ChatGPT free: what $0 gets you in 2027
Unlimited chat on the default model
The headline change of 2026 is that everyday text chat on ChatGPT free is now unlimited. The old cap of roughly 10 messages per rolling 5-hour window is gone for normal conversation: you can chat all day on the default instant model, known in 2026 as the Luna line, subject only to anti-abuse guardrails. Model names shift every few months — OpenAI has shipped both GPT-5.6 and GPT-6 branded defaults this year — so the name in your chat box may change, but the deal stays the same: unlimited plain text chat for free, with no credit card required. For the full breakdown of every cap that remains, see our guide to ChatGPT's free plan limits in 2027.
Where the free limits kick in
Unlimited covers text and nothing else. Everything expensive is metered separately. Independent testing and OpenAI's own plan table agree on the shape of it: image generation is limited to roughly 2–3 images per day (slower on free, and it varies with server load), file uploads are limited to a few per day, voice chats are capped, Deep Research reports are limited, and chat memory is limited (testing puts it around 16K of remembered context, with a 27K-token context window for instant answers and a roughly 12-page cap on a single message's input). The Codex coding assistant and the desktop ChatGPT Work app are available on free in limited form. The advanced reasoning models — the GPT-6 generation and the dedicated thinking/reasoning tiers — are paid-only; free users do not get them in the chat box.
The ads question
One honest catch: OpenAI has tested showing ads to free users in the US and Europe, and the official plan table lists ads as a possibility on the free tier. Paying removes them — Go at $8/month keeps ads possible, while Plus at $20/month and Pro from $100/month are ad-free. If you want a like-for-like free comparison with other assistants, our DeepSeek vs ChatGPT free comparison looks at an ad-free alternative.
Gemini free: what $0 gets you in 2027
The October 2026 Flash-Lite change
This is the single most important fact about Gemini free in 2027: from 9 October 2026, free users are restricted to Flash-Lite, Google's smallest model. Previously, free accounts could use Flash and had some access to Pro; after the change, Flash and Pro disappeared from the free tier entirely, and the $4.99/month AI Plus tier also lost Pro access. Anyone who wants Pro-level Gemini now needs AI Pro at $19.99/month or an Ultra plan. Google announced the change through its support documentation rather than a blog post, and AI Plus subscribers were told they would get an individual email explaining when the change reaches their account. If you use Gemini free for coding help, long-document analysis or multi-step reasoning, expect a real capability drop, not just a rate-limit tweak.
Strengths of the free tier
Despite the model cut, Gemini free keeps some genuinely strong features. The context window is 32K tokens — larger than ChatGPT free's 27K for instant answers — and file uploads fit inside that window. Usage limits are compute-based and refresh every 5 hours until you hit a weekly cap, though Google does not publish an exact prompt count. You get 5 Deep Research reports per month, basic image generation (powered by Google's Nano Banana image model), limited Audio Overviews, Gemini Live voice mode, web search grounding with citations, and 15 GB of Google One storage. Memory works well too: Gemini remembers details across chats. For users living inside Google's ecosystem — Gmail, Drive, Docs — the integration alone is worth a lot.
Gemini vs ChatGPT free: the full comparison
| Feature | ChatGPT Free | Gemini Free |
|---|---|---|
| Price | $0 | $0 |
| Everyday text chat | Unlimited on default instant model | Compute-based limits, 5-hour refresh + weekly cap |
| Best available model | Default instant model only (Luna class); no GPT-6 reasoning | Flash-Lite only since 9 Oct 2026 (was Flash + some Pro) |
| Context window | 27K tokens for instant answers | 32K tokens |
| Image generation | Yes, limited (~2–3/day in testing, slower) | Yes, basic (Nano Banana) |
| File uploads | Yes, limited per day | Yes, within 32K context |
| Deep Research | Limited | 5 reports/month |
| Voice | Limited voice chat | Gemini Live voice mode included |
| Live web information | Built-in web search | Search grounding with citations |
| Memory | Limited | Remembers details across chats |
| Ads | Tested in US and Europe on free | Not announced for the app |
| Cheapest upgrade | Go, $8/month | AI Plus, $4.99/month |
Category-by-category verdicts
Everyday chatting and writing: ChatGPT wins
Unlimited text chat is the killer feature of ChatGPT free. If your usage is quick questions, rewrites, summaries and light study help, you will essentially never hit a wall. Gemini's compute-based limits with a weekly cap are fine for casual use but can bite during a heavy week, and Google has never published an exact prompt count, so you cannot plan around it.
Long documents and uploads: Gemini wins
Gemini's 32K context window beats ChatGPT free's 27K, and ChatGPT free caps a single message's input at roughly 12 pages of text. For summarising long PDFs, reports or transcripts on a free plan, Gemini gives you more headroom. The catch is that you are doing it with Flash-Lite, the weakest model — better context, weaker brain.
Image generation: a draw, both limited
Both free tiers generate images with daily limits. ChatGPT free is slower and capped at a couple of images a day in practice; Gemini free offers basic generation through Nano Banana. Neither is a substitute for a dedicated image tool if you create visuals regularly.
Live, up-to-date information: Gemini edges it
Both have built-in web search, but Gemini's search grounding with citations tends to be more transparent about sources — useful when you need to verify claims. ChatGPT's browsing is perfectly usable for everyday lookups.
Voice: Gemini wins
Gemini Live voice mode is included on the free tier, while ChatGPT free limits voice chats. If you like talking to your assistant hands-free, Gemini is the better free pick.
Privacy and ads: neither is perfect
Free tiers on both services use your data under their published policies, and neither offers the data protections of a business plan. ChatGPT free may show ads in some countries; Google has not announced in-app ads for Gemini, but your activity feeds Google's ecosystem. If privacy is the deciding factor, check each company's current policy before committing.
Pros and cons
ChatGPT free: pros and cons
- Pro: unlimited everyday text chat — the most generous core allowance of any major free chatbot.
- Pro: strong general knowledge and writing quality on the default model.
- Pro: custom GPTs built by others are accessible, plus limited Codex and desktop Work.
- Con: no advanced reasoning models on free — the frontier is paywalled.
- Con: tight caps on images, uploads, voice and Deep Research.
- Con: ads are being tested on the free tier in the US and Europe.
Gemini free: pros and cons
- Pro: 32K context window and generous file handling for a free tier.
- Pro: Gemini Live voice, search grounding with citations, and 5 Deep Research reports a month.
- Pro: deep integration with Gmail, Drive and Docs for Google users.
- Con: Flash-Lite only since October 2026 — the weakest model, and a real step down for reasoning tasks.
- Con: usage limits are unpublished and compute-based, with a weekly cap that can surprise you.
- Con: the $4.99 AI Plus tier also lost Pro access, so the upgrade path to real power starts at $19.99.
Verdict: ChatGPT free is the better all-rounder for most people in 2027. Unlimited text chat on a capable default model covers the vast majority of everyday use, and the free tier's biggest weakness — metered images, uploads and voice — only matters if you lean on those tools. Gemini free is the better specialist pick if you work with long documents, want hands-free voice, or live in Google's ecosystem — but the October 2026 Flash-Lite restriction is a serious handicap for reasoning-heavy work, and anyone hitting that wall should either test Claude's free tier or budget for a paid plan.