> 4.8 is also 2x more expensive for a "modest" performance bump. How refreshing.

Where are you seeing it's 2x more expensive? https://platform.claude.com/docs/en/about-claude/pricing

Don’t measure model cost by token price. Measure based on tokens used to achieve a task.

Others report in this thread that it’s about 2x more expensive due to outputs: https://news.ycombinator.com/item?id=48312774