Free ChatGPT gives you unlimited access to one model. That is a genuine upgrade, and it is also the shape of the remaining limitation: you cannot choose. Luna is built for speed and cost rather than for hard problems, and when a task would suit a reasoning-tier model, a long-context model or an image model, the free plan has no answer other than upgrade.
That matters more than it sounds, because models differ in ways that show up on ordinary work. A reasoning model shows its steps on a multi-stage problem. A long-context model holds a whole document rather than the first third of it. Models from different labs are trained and tuned differently and produce noticeably different answers to the same question - which is why running one prompt through two of them is the fastest way to find out which suits your work.
This is the gap Chat Smith is built for. Rather than one vendor's model, it puts several in one place - GPT tiers alongside Claude, Gemini, Grok and DeepSeek - so you can match the model to the task instead of accepting whichever one your plan includes. The full model list shows what is available, and there is a free tier to test the idea before deciding anything.
The cost comparison is where this gets concrete. ChatGPT Plus is $20 a month. Chat Smith Pro is $9.99 a month, or $39.99 for a year - roughly $3.33 a month if you commit to twelve. For that you get GPT-5.6 Sol alongside Claude Sonnet 5, Gemini 3.5 Flash, Grok 4.5 and DeepSeek V4, rather than one vendor's family. Prices were correct at the time of writing and are on the Chat Smith pricing page.
The free tier is genuinely usable rather than a trial, and two things on it are worth noting because ChatGPT charges for them: Deep Research with live web search, and image generation on ChatGPT Images 2.0 and Nano Banana Pro.
| Chat Smith | Free | Pro |
|---|
| Fast models for everyday questions | Limited | Full access |
| GPT-5.6, Claude Sonnet 5, Gemini 3.5 Flash, Grok 4.5, DeepSeek V4 | Limited | Full access |
| Image generation with ChatGPT Images 2.0 and Nano Banana Pro | Included | Included |
| Deep Research and realtime search | Included | Included |
| Sync across phone, tablet and browser | Included | Included |
| File uploads | Limited | Full access |
| Grammar, rewriting and study tools | Limited | Full access |
| Price | Free | $9.99 a month or $39.99 a year |
To be clear about where it does not help: if you only ever type text questions and one model's answers suit you, free ChatGPT is now an excellent deal and there is no reason to add anything. The case for a multi-model tool is a case about variety of work, not about message caps - those are gone.