--- title: ChatGPT's Monthly Bill Is Locked In! Hidden Sites to Use the Latest AI Models for Free date: 2026-10-07 time: 21:40 model: admin category: reviews summary: If you want to try the latest AI models like GPT-5, Claude, and Gemini without a subscription, start here. Four free platforms that let you run frontier models, plus what each one's free quota looks like. tags: free-ai,LMArena,OpenRouter,Groq,GoogleAIStudio,GPT,Claude --- The latest AI models — GPT-5, Claude, Gemini — are dropping left and right these days. But to actually use them properly you're looking at 20,000 to 30,000 won a month in subscription fees per platform. Pay for everything and your wallet gets thin; skip it and you feel like you're falling behind. Here's the thing, though. There are sites where you can try these frontier models completely for free, and in one place. I pulled together the free AI platforms the AI community already calls the good stuff. One caveat up front: everywhere has some kind of cap on free usage. The point is to use them to check "is this AI actually right for me?" before you pay. ## 1. The Colosseum where the world's AI battles — Chatbot Arena (LMArena) LMArena (arena.ai), which started out of UC Berkeley's LMSYS, is the most famous free AI comparison platform in the world. It was originally built to blind-test model performance and produce rankings, but among regular users it's better known as a free playground for the latest AI. One thing has changed. You used to be able to use it without logging in, but now you need a free account with an email or Google sign-in. No payment is required, of course. There are three modes: - Battle mode: You throw a question at two models whose names are hidden, and both answer at once. Vote for the better one and their identities are revealed. You can watch GPT-5 and Claude go head to head over a single question of yours. - Side by side: Line two models up next to each other and compare their answers to the same question. - Direct chat: If head-to-head matchups are a hassle, use this instead. Pick the model you want and chat like a normal chatbot. Since 2026, web search and agent features have been bolted on as well. That said, LMArena is an evaluation platform through and through, so which models are available shifts constantly. Just remember: the model you used today might be gone tomorrow. ## 2. If you need more free models — the big three alternatives ### OpenRouter — the AI department store A platform that gathers hundreds of models in one place. Filter the model list by price "Free" and you can use the free models, which have `:free` tacked onto the end of their names. One thing to watch. The free tier generally covers around 20 models, and the list changes constantly. DeepSeek and Gemini, which used to show up a lot, are often not on the free list anymore. Right now the free options are mostly the Llama family, the Qwen family, and models like NVIDIA's Nemotron. Worth knowing the free quota too. Typically 20 requests per minute, 50 per day. If you've ever paid even $10, your daily cap jumps to 1,000 (the 20/minute stays the same). If you're a developer you can also grab a free API key and wire it into your own programs. ### Groq — AI that answers at the speed of light Groq (console.groq.com) doesn't use ordinary GPUs. It runs on its own LPU, a chip purpose-built for inference. Answers come back 3 to 10 times faster than on a normal server. Depending on the model it spits out 400 to 1,000 tokens per second, so even a long answer in Korean fills the screen in an instant. Ideal for quick lookups and summarizing. The free tier hands you an API key the moment you sign up, no credit card needed. The quota is around 30 requests per minute and 14,400 per day. It supports a wide range of open models — Llama, Qwen, DeepSeek, Kimi, and more. ### Google AI Studio — the heavy-duty document analysis champ Google opened this up for developers, but anyone with a Google account uses it. You get Google's latest Gemini 3.x models for free. Feed it several hundred-page PDF papers, or upload a full hour-long video, and it reads and summarizes them in one go. The free tier has per-minute and daily request caps, so check them before any big batch job. ## 3. Side-by-side comparison | Site | Strength | Free quota (approx) | Sign-up | | --- | --- | --- | --- | | LMArena | Compare and try frontier models | Daily chat volume cap (generous) | Free account | | OpenRouter | Hundreds of models, free API key | 20/min, 50/day | Free account | | Groq | Blazing speed (LPU) | 30/min, 14,400/day | Free account | | Google AI Studio | Large documents and video analysis | Per-minute and daily request caps | Google account | ## Wrapping up AI moves fast enough that checking a platform like this before springing for an expensive subscription — "is this AI actually going to help my work or my studies?" — is the smart move. Every site has free caps and policies change often, so treat the numbers above as rough reference points only. Still, there's nothing better to run through before you hit that pay button. Log into LMArena or OpenRouter today and put those frontier models you could never justify paying for through their paces for free.