Best Free AI Chatbots: What You Actually Get for Free
Every chatbot calls itself free. The word covers three different arrangements, and which one you are in decides how much you can actually use. Here is how the free options differ, with the numbers behind each.
This guide compares chatbots by what their free arrangement actually is, with prices and context windows from the Rewind.ai model catalogue rather than marketing pages. Numbers were checked in August 2026; the catalogue updates as providers ship new models.
Three kinds of free
A daily allowance. Rewind.ai gives every visitor 2,500 tokens a day with no account at all, and a free account raises that to 5,000. The allowance works across every model and tool on the site, so you can spend it on Claude one day and on image generation the next. A typical chat exchange runs somewhere between 100 and 2,000 tokens.
A true free tier. Some models are published in two versions, a paid endpoint and a free one. MiniMax M3, Z.ai's GLM 5.2 and Google's Gemma 4 31B all have free tiers on Rewind: the per-token price is simply zero. Which models carry one changes as providers rotate them, so treat the catalogue as the live list.
A capped plan on the vendor's own site. OpenAI, Anthropic and Google each run a free plan for their own assistant. The caps change often and are not published as numbers you can hold them to, so check the vendor's pricing page for the current state rather than a blog post, including this one.
Eight chatbots, one price sheet
These are the catalogue numbers for eight popular models as they run on Rewind.ai. The price is per million input tokens; your daily free tokens apply to all of them.
| Model | Provider | Context window | Price per 1M input tokens |
|---|---|---|---|
| MiniMax M3 (free) | MiniMax | 1,048,576 tokens | $0.00 |
| Claude Sonnet 4.6 | Anthropic | 1,000,000 tokens | $3.00 |
| GPT-5 | OpenAI | 400,000 tokens | $1.25 |
| GLM 5.2 (free) | Z.ai | 256,000 tokens | $0.00 |
| DeepSeek V3.2 | DeepSeek | 163,840 tokens | $0.27 |
| Kimi K2 | Moonshot AI | 131,072 tokens | $0.57 |
| gpt-oss-20b | OpenAI | 131,072 tokens | $0.03 |
| Qwen2.5 7B Instruct | Alibaba | 32,768 tokens | $0.10 |
The spread is what matters: the most expensive model on this sheet costs a hundred times more per token than the cheapest paid one, and the largest context window holds thirty times more text than the smallest. Free is not one number.
How to choose between them
- Long documents: the context window decides. MiniMax M3 takes 1,048,576 tokens in one conversation and Claude Sonnet 4.6 takes 1,000,000, roughly a whole book with room to spare. Qwen2.5 7B tops out at 32,768.
- Everyday questions: a free-tier model costs nothing per message, so start with MiniMax M3 or GLM 5.2 and escalate only when the answer is not good enough.
- Stretching a small budget: at $0.03 to $0.10 per million input tokens, gpt-oss-20b and Qwen2.5 7B make the 2,500 daily free tokens go a very long way.
- Comparing before committing: every model above runs in the same chat on Rewind, so you can put the same prompt to two of them and read the answers side by side instead of trusting a review.
What happens to your chats
On Rewind your chat history is saved locally in your browser; signing up syncs it across devices. Model requests are billed pay-as-you-go through OpenRouter. Each vendor's own assistant has its own data policy, and those policies change, so if training use matters to you, read the current policy on the vendor's site rather than a summary written months ago.
Where free ends
The daily allowance resets every 24 hours. When a conversation needs more than that, token packs start at $5 for 200,000 tokens, and the free-tier models keep working at zero cost regardless. There is no subscription: you either spend tokens you were given or tokens you bought.