Anthropic is changing how Claude Code usage is billed. Starting at 12:00 PT on April 4, 2026, usage routed through third-party tools such as OpenClaw with OAuth tokens tied to Claude subscriptions will no longer count against included subscription limits. Users will need to switch to prepaid extra usage or apply for an API key and pay by consumption.
OAuth-based access had been bypassing standard API billing
The policy targets a method that had spread through the community. After signing in with a Claude Pro or Max subscription, users could obtain an OAuth token, exposed through the environment variable CLAUDE_CODE_OAUTH_TOKEN. By feeding that token into OpenClaw, third-party software could call Claude as if it were the official client, avoiding normal API charges.
That meant a single monthly subscription could be used to power external tools while Anthropic absorbed the compute cost. According to the source material, the issue was discovered by the community in late 2025. Anthropic briefly shut the path down in January 2026, then restored service later, though the core problem remained unresolved.
OpenClaw’s rise made the issue harder to ignore
OpenClaw has been one of the more closely watched open-source AI agent projects this year. Connected to Claude, it could move beyond coding assistance and handle email, calendar management, and airline check-in tasks. The report says the project gained particular traction in China, which pushed Anthropic to respond directly.
Anthropic’s explanation centers on capacity. The company said its product was not designed for heavy third-party usage patterns and that compute resources need to be allocated with tighter control, with service quality reserved first for official products and standard API customers.
Users are being offered credits, discounted usage, or refunds
Anthropic outlined three options for affected subscribers. One is a one-time credit equal to the current month’s subscription fee, which can be used toward later charges. Another is the ability to buy extra usage packs at a discount so third-party tools can keep running. The third is a full refund through a link sent by email.
Users who still want to run Claude through OpenClaw can continue to do so, but the billing path changes. They must request an Anthropic API key and pay based on actual usage instead of drawing from subscription allowances. For light users, the cost may stay close to what they paid before. Heavy OpenClaw users may see much larger bills.
Revenue scale gives Anthropic a strong reason to close the gap
The business backdrop is significant. The source states that Claude Code generates about $2.5 billion in annualized revenue, while Anthropic’s overall valuation has reached $380 billion and annualized revenue has surpassed $14 billion. At that size, any systematic way to consume compute without going through API billing becomes a direct hit to margins.
Once the change takes effect, the line between Claude subscriptions and API access will be much sharper. OpenClaw itself is not being cut off entirely. What ends is the ability to use subscription-covered access as a substitute for paid third-party model usage.