Right now Google Antigravity has free Claude Opus 4.5, with pretty decent allowances.

I also use Github Copilot which is just $10/mo. I have to use the official copilot though, if I try to 'hack it' to work in Claude Code it burns thru all the credits too fast.

I am having a LOT of great luck using Minimax M2 in Claude Code, its very cheap, and it works so good.. its close to Sonnet in Claude Code. I use this tool called cc-switch to swap out different models for Claude Code.

Highly recommend Claude Max, but I also want to point out Opus 4.5 is the cheapest Opus has ever been.

(I just learned ChatGPT 5.2 Pro is $168/1mtok. Insanity.)

If you pay for a Claude Max subscription it is the same price as previous models.

Just wait a few months -- AI has been getting more affordable _very_ quickly