OpenAI & Anthropic API Usage Tier & Rate-Limit Lookup
Hit a 429 and not sure why? Enter what you've spent and this shows which OpenAI or Anthropic usage tier you're in, the RPM/TPM it gives your model, and exactly how much more to spend — or how long to wait — to reach the next tier. No signup, no API key, sources cited.
How it works
Both OpenAI and Anthropic gate their API rate limits behind a ladder of usage tiers. You climb the ladder by paying: each tier has a cumulative spend (or deposit) threshold, and reaching it raises your monthly spend cap and your per-model requests-per-minute (RPM) and tokens-per-minute (TPM) limits. This tool is a deterministic lookup over the documented ladders and a dated rate-limit snapshot — nothing is estimated or fudged.
OpenAI tiers use two gates, and both must be met. A tier is reached only when your cumulative paid spend clears its threshold andenough days have passed since your first payment. The documented thresholds are Tier 1 at $5 (0 days), Tier 2 at $50 (7 days), Tier 3 at $100 (7 days), Tier 4 at $250 (14 days), and Tier 5 at $1,000 (30 days). Formally, your tier is the highest T where spend ≥ threshold[T] and days ≥ minAge[T]. Because both gates rise together, this is why a well-funded but new account can be stuck: you can clear every money threshold and still sit on Tier 1 until the age gate passes.
Anthropic uses a single gate that unlocks immediately.Your tier is the highest one whose cumulative deposit you've met — Tier 1 at $5, Tier 2 at $40, Tier 3 at $200, Tier 4 at $400 — with no waiting period. Deposit past a threshold and the higher limits apply right away.
For the gap to your next tier, the tool computes spendGap = max(0, threshold[next] − spend) and, for OpenAI, dayGap = max(0, minAge[next] − days). The next tier arrives only when both are zero. In “What do I need?” mode it works backwards instead: it scans tiers upward and returns the lowest one whose RPM and token limits meet the numbers you enter, then tells you the spend (and age) to get there. To flag which limit throttles you, it reports a crossover — TPM ÷ RPM — the average tokens-per-request at which the token limit and the RPM limit run out at the same moment. Two independent scans (descending and ascending) resolve the tier and must agree, which is how the numbers stay auditable.
Worked examples
Frequently asked questions
Sources & references
- OpenAI — Rate limits & usage tiers (spend + account-age gates, per-model RPM/TPM)
- OpenAI — Organization limits dashboard (monthly usage caps per tier)
- Anthropic — Rate limits (Claude Platform Docs: deposit thresholds, RPM/ITPM/OTPM)
Tier thresholds, account-age gates, monthly caps, and per-model rate limits were last cross-checked against these sources on 2026-07-10. Each rate-limit number is a dated snapshot; providers change limits by model version and region, so confirm against your live dashboard before relying on one. This tool never reads your account — it computes from the figures you enter.
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Comments & feedback
Spotted a bug or want an improvement? Tell us — our team reviews every comment, and good ideas get built. Comments are public and anonymous.
Spotted a tier threshold or rate limit that's changed?
Email me at [email protected] — I update the snapshot fast.