What's changed
Circum 1.5 is a much larger model that costs us for every message, and this keeps it available for everyone.
A very big job, like building a large plugin, still counts what it uses (5 times its tokens) when that is more than 2M.
If Circum 1.5 is busy and a backup model answers instead, the message counts only the tokens it used, once.
Questions in the small help chat on every page, and Circum in your Minecraft server, count only what they use.
Circum 1.0 counts each token once, so pick it for quick questions or to make your tokens last. The model picker shows what Circum 1.5 uses.