Because you basically get a discount to use claude code via subscription when using an anthropic model, compared to what you pay via api billing with another harness
replyUnderstood.
replyPersonally that's actually another good reason to boycott Anthropic: beside the fact I perceive their models as (at best) marginally better than the ones I'm used to (Z.ai glm-5.3-flash, DeepSeek Flash v4.1), they even force me to use their bloated harness. They are not even open weights and iirc they're even encrypting chain of thoughts now? Litterally, from my perspective there seems to be no reason whatsoever to choose any of the leading US providers, they're not even competing on price.
I too am using GLM-5.3-flash in Pi and I've yet to encounter a scenario it couldn't handle. And the pricing is just incredible, I've handed it a previously unseen codebase, asked it to analyse it and build a new feature, came back after it had done so and the API cost was a fraction of a cent. It's $0.5/1M output tokens on OpenRouter.
replyIf I really need to, I can escalate a task to Opus at $25/1M, and the results are good, but not 5000% as good.