GitHub Copilot is shifting to usage-based billing on June 1, 2026. If you've been relying on flat-rate pricing to shield you from the realities of AI coding costs, your runway just evaporated.

We've been tracking a nasty trend in the wild: the "27x billing trap." When an AI coding assistant gets stuck in a recursive loop—hallucinating a fix, failing the test, and trying again—it burns tokens at maximum velocity. Under flat-rate billing, this was an invisible annoyance. Under usage-based billing, it's a catastrophic financial event.

We saw one dev hit a -$563 bill on a $5 prepaid account because provider-side limits don't enforce in real-time. They are eventually consistent, and by the time the provider shuts you down, the damage is done.

The clock is ticking. You have less than 30 days to implement hard enforcement before the new billing model takes effect.

You don't need another dashboard that sends you a Slack alert after your budget is blown. You need an enforcement layer that kills the request before the network call is made.

That's why we open-sourced LLM Budget Guard. It's a dead-simple, local SDK enforcement layer that cuts the cord the millisecond your hard cap is reached. No proxy routing latency, no cloud gateway single points of failure. Just deterministic budget enforcement.

Self-host it and protect your runway: llmeter.org