so it is worse than gpt 5.5 for coding?

I doubt it, they seem to keep getting 10-20% better every time for me

for me opus 4.7 it's worse than 4.6, that's why i switched to codex

I had the same experience.

The question is: is it still worse than GPT 5.4?

If Opus 4.8 is just slightly better than 4.7 then it maybe ties with GPT 5.4, maybe. And it gets completely outclassed by GPT 5.5 for my workload.

With Anthropic expensive pricing, there's no reason for me to switch from GPT+DeepSeek.

And I bet Mythos is GPT 5.5 tier but too expensive to distribute so they create this security FUD theater.

The true question: is it still worse than itself v. 4.6?