> ... make it a lot more expensive to use for multi-turn coding than many would assume from the $2/$6 headline numbers they led with.

There's a further sting in the tail, Grok 4.5 is only $2/$6 for the first 200k of context. Go above that, and the pricing is $6 / $12 - and you're still capped at only 500k context anyway.

Here's the xAI pricing on OpenRouter:

https://openrouter.ai/x-ai/grok-4.5?endpoint=0e927811-b1a8-4...