docs: update concurrency tier thresholds

[Kilerd]

Summary

• add a new high-volume concurrency tier for users with at least $1,000 paid
• clarify that concurrency tiers unlock once the prepaid amount reaches the threshold
• explain that users can top up in advance to unlock a higher tier without spending the full balance first

Summary by CodeRabbit

• Documentation
  • Added High Volume concurrency tier (50 concurrent requests) for accounts with ≥$1,000 in paid charges.
  • Clarified that concurrency tiers unlock immediately upon reaching the spending threshold and that prepaying in advance can activate the next tier.

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Project	Status	Preview	Updated (UTC)
hanabiaiinc	🟢 Ready	View Preview	Mar 27, 2026, 5:36 AM

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: bbbefcab-5063-4966-b9ec-a38b1ed67554

📥 Commits

Reviewing files that changed from the base of the PR and between ba3c0d7 and 70b3b0b.

📒 Files selected for processing (1)

• developer-guide/models-pricing/pricing-and-rate-limits.mdx

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📝 Walkthrough

Walkthrough

Documentation update to the pricing and rate limits guide that introduces a new "High Volume" concurrency tier with ≥ $1,000 prepaid spending threshold and 50 concurrent requests, plus a clarification callout explaining immediate tier availability based on prepaid balance.

Changes

Cohort / File(s)	Summary
Pricing Documentation developer-guide/models-pricing/pricing-and-rate-limits.mdx	Added "High Volume" concurrency tier row to the rate limits table and inserted a <Tip> callout explaining that concurrency tiers unlock immediately upon reaching the prepaid threshold without requiring full balance consumption.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 A new tier hops into view,
High Volume's promise shining through,
Fifty requests, concurrent and bright,
Prepaid thresholds unlock the sight!
Tips clarify what once was murky—
Documentation's done, no need to be quirky! 🚀

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/concurrency-tier-update

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