docs: explain concurrency and QPM conversion

[Kilerd]

Summary

• Explain that Fish Audio rate limits are based on concurrent in-flight requests, not a fixed QPS or QPM allowance.
• Add the planning formulas for converting concurrency to QPS/QPM and estimating required concurrency.
• Show example QPM estimates for short AI companion replies, voice-agent turns, narration paragraphs, and long-form audiobook synthesis.

Validation

• npx prettier --check developer-guide/models-pricing/pricing-and-rate-limits.mdx
• git diff --check
• npx mint validate was run with filesystem access for Mintlify's cache. It reached build validation but failed on existing repository warnings unrelated to this page: invalid react imports in snippet JSX files and a missing temp snippet import.

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 3416597a-4195-444c-99bd-a60dcb190e9c

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/concurrency-qpm-rate-limits

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[mintlify]

Preview deployment for your docs. Learn more about Mintlify Previews.

Project	Status	Preview	Updated (UTC)
hanabiaiinc	🟢 Ready	View Preview	Jul 6, 2026, 1:37 PM

💡 Tip: Enable Workflows to automatically generate PRs for you.