For the last week, I've been heavily immersed reverse engineering a device with help of GLM-5.3 and it surpassed all my expectations - I actually managed to achieve very way more than I thought I would. I never worked on such low level stuff, it would have taken me months to learn ARM assembly and how to find for and write exploits. Initially, I attempted this with Claude, but it blocked me on the very first message, so I got a refund and decided to try z.ai. The only downsides are that it's maybe a bit slower than my day job Opus and I had to pay ~200 EUR for a monthly plan in order not to bump into weekly limits in a couple of days. If this level of capability cost maybe 50 EUR, I'd strongly consider getting a long time subscription.