2026-11-10 Claude Epic Status Line v2.2.1 - the right per-turn cost on Fable 5.2

Canonical version: 2026-11-10 Claude Epic Status Line v2.2.1 - the right per-turn cost on Fable 5.2.

Anthropic released Claude Fable 5.2 and Mythos 5.2 yesterday (2026-11-09). I've just shipped v2.2.1 of Claude Epic Status Line, my status line for Claude Code, so that it shows the right per-turn cost for both.

What was wrong

The status line shows what your next message costs before you type anything (e.g., 48k/turn). Why does that matter? The API is stateless. On every turn, the whole context is sent again, and you pay for it at the cache-read rate. So what a turn costs depends on the size of your session, not on the length of your prompt.

That cache-read rate is different for each model. Since v2.2.0, CESL_TURN_RATE=auto picks it for you: 5% of the input price for Opus 5.5 and Sonnet 5.5, 2.5% for Claude Fable 5.1, and 10% for all the others.

Fable 5.2 and Mythos 5.2 weren't in that list (and neither was Mythos 5.1). All three read cache at 2.5% of the input price, but the status line gave them 10%. On those models, the per-turn cost it showed was FOUR times too high: a 400k session displayed 40k/turn instead of 10k/turn.

What changed in v2.2.1

• CESL_TURN_RATE=auto now uses 2.5% for Fable and Mythos, both 5.1 and 5.2
• Fable 5 and Mythos 5 keep the 10% rate
• If you prefer to set the rate yourself, a number in CESL_TURN_RATE still overrides the automatic one

If you use Fable on a Max, Ultra or Team premium seat, note that it's capped at 50% of your weekly limits. The per-model weekly rows of the dashboard show that cap when the usage API returns it.

Get it

Already using it? Run git pull in your clone, then bash install.sh again. The installer backs up your old script first.

New here? Clone the repository and run bash install.sh.

• Source code: https://github.com/dsebastien/claude-epic-status-line
• Release: https://github.com/dsebastien/claude-epic-status-line/releases/tag/v2.2.1

That's it for today! ✨

References

• Release: https://github.com/dsebastien/claude-epic-status-line/releases/tag/v2.2.1
• Models overview: https://platform.claude.com/docs/en/about-claude/models/overview
• Pricing: https://claude.com/pricing

Related

• Claude Epic Status Line
• Claude Code
• Claude Fable 5.2
• Claude Fable 5.1
• 2026-11-10 Claude Fable 5.2 - cheaper per token, twice the cost per task at max effort

About Sébastien

Ready to get to the next level?