Tested a batch of free AI tools this week, honest verdicts on Claude, MiniMax, K2Think, and a couple comparison playgrounds

Spent some time poking at free tiers across a few tools. Here's what actually held up and where the catches are. \*\*Claude (Sonnet 4.6 on free tier)\*\* Still the one I reach for when I want writing that doesn't read like a press release, or code that actually compiles. I trust it more for anything where being quietly wrong is worse than being loudly wrong. The catch: free tier is stingy. You hit limits fast on busy days, need a phone number to sign up, and there's no warning before it cuts you off. There's a browser extension that tracks usage so you can see the wall coming. My approach: use it for the hard 20% of the day, let a free model handle the rest. \*\*MiniMax Agent\*\* A free swing at what Devin and Manus charge for, give it a prompt and it writes, runs, and debugs the code itself. Replaces the copy-paste loop between ChatGPT and your editor for longer multi-step jobs. Catch: it burns credits fast, and complex tasks still go off the rails without warning. It's confidently wrong in ways that can cost you more time than just doing it yourself. Worth a few free runs to see if it actually finishes a task, but I wouldn't cancel anything for it yet. \*\*K2Think\*\* A 32B reasoning model from MBZUAI and LLM360, positioned as a free alternative to o1 / DeepSeek R1 for step-by-step reasoning, math, and logic. Note: this is NOT Kimi from Moonshot despite the name confusion. Honesty flag, the benchmark claims got real pushback, there's an HN thread literally titled "Debunking the Claims of K2-Think," so take the leaderboard numbers with salt. Still, a fully open 32B reasoning model is nice to have around. Try it on something gnarly and see if the reasoning holds. \*\*Indic LLM Arena\*\* A side-by-side chat playground from AI4Bharat (includes Gemini 3.5 Flash), built for benchmarking Indian languages. Usage is unlimited, which I double-checked because that's rare. No save history, and it's clearly tuned for Indic languages. If you write in Hindi, Tamil, or Bengali, easiest free way to see which model actually handles your language. \*\*Together.ai playground\*\* Rotating menu of open models in one place, GLM-5.1, Kimi K2.6, Deepseek-V4, so you're not juggling five tabs. Cap is 110 messages/day split across whatever models you pick. Plenty for tinkering, not enough to run a side project on. Got a 429 when I tried to load it, so expect occasional traffic jams. Worth a bookmark just to track which open model is winning this month. The one that actually made me cancel a paid subscription this batch was Claude replacing my main text workflow, which almost never happens. *I write a weekly newsletter doing exactly this. DM me or drop a comment if you want the link.*