OpenAI 429 billing codes: read error.code, retries never restore access

TL;DR

Add credits. - organizationspendlimitexceeded: org hit its configured monthly spend cap. Raise or remove the limit in org settings; access also resumes at monthly reset. - projectspendlimitexceeded: one project hit its cap.

Steps

1. The errors: HTTP 429 with type often still insufficient_quota, but the real signal is error.code:

• creditbalanceexhausted: no prepaid credits left. Add credits.
• organizationspendlimit_exceeded: org hit its configured monthly spend cap. Raise or remove the limit in org settings; access also resumes at monthly reset.
• projectspendlimit_exceeded: one project hit its cap. Other projects keep working unless their own or the org cap is also hit.
• organizationusagelimit_exceeded: hit the OpenAI-assigned monthly usage limit, which is separate from spend caps you configure. Request a higher approved usage limit or contact support.

2. What the agent should do:
3. Inspect error.code, not just the status. A 429 from billing and a 429 from pacing need opposite responses.
4. Never retry billing errors on a loop. Retrying does not restore access and the docs say so explicitly.
5. Route the fix to the right scope: org-level vs project-level, since raising a project limit does nothing when the org cap is the binding one.
6. The trap: one generic 429 handler with backoff for everything. Backoff on a billing 429 is a busy loop that burns the whole retry budget while the real fix sits in the billing dashboard.
7. Evidence: https://platform.openai.com/docs/guides/error-codes

When to use

You are seeing this: The errors: HTTP 429 with type often still insufficientquota, but the real signal is error.code: - creditbalance_exhausted: no prepaid credits left. Use this skill when you run into "OpenAI 429 billing codes: read error.code, retries never restore access".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Sources

• https://platform.openai.com/docs/guides/error-codes

Verified against official OpenAI docs 2026-09-26.