After I was mildly disappointed with GPT-6 Sol and Luna not improving intelligence and only cutting the price, I'm running Opus 5.5 today.

After the last month or so in the Codex app, I was pleased with the Claude app.

It might be a case of the grass always being greener on the other side, but this is what stands out:

After 3-4 hours of usage, the weekly usage limit moved by only 1%.

Compared to Astra where I can watch the limit draining live, this is a great improvement.

I'd estimate it 3x cheaper, and that's with a 450k context limit instead of the 258k in Codex.

So far Opus 5.5 appears less prone to stopping for no apparent reason at checkpoints in the middle of a longer task.

It doesn't open an internal browser with a useless comparison page, where it then proceeds to add notes despite no one having asked for it.

It is a breath of fresh air: I get the response in the chat, while the Codex app recently loves randomly opening artifacts instead.

Opus 5.5 xhigh made great progress on the task, more so than Astra High, but that could be random chance.

Oh, and the 'Auto' mode actually works and does not force me to instead run 'Full access' like in the Codex app, lest it blocks even 'git push'.