Anthropic quietly changes its extra usage settings
With the Opus 4.7 release on April 16, 2026, Anthropic changed several things about its Claude Code billing model — without a broadly communicated release note. Anyone who wants to keep using Opus 4.6 or activate Fast Mode now hits a new wall: extra usage. What used to run inside the normal plan allowance now only runs through a separate, opt-in cost bucket.
This is the new threshold
The toggle that used to be a safety net is now a requirement.
In the Anthropic account, the extra-usage switch controls whether requests can go beyond your plan allowance. Before April 2026 this was an optional safety net. Today it's the only way to use Fast Mode at all — and the counter underneath shows exactly how much you're spending on top.
And here's how the change shows up in the CLI
Try Fast Mode without flipping the toggle and you hit this block.
This is exactly what the change produces: /fast in Claude Code only accelerates if the web toggle is on. Otherwise this warning appears — and the session keeps running at standard speed against your normal plan allowance.
What concretely changed
- Opus 4.6 disappeared from the model picker in the Desktop Code tab (confirmed in GitHub Issue #49689). The picker only shows “Opus” — and that resolves to Opus 4.7.
- Fast Mode for Opus 4.6 only runs through extra usage, no longer against plan allowances. Even paying Pro/Max subscribers count Fast Mode tokens to the separate extra-usage counter.
- Fast Mode pricing stays at $30 / $150 per MTok — six times standard. The February promo (50% discount) ended on February 16, 2026.
What used to be
Until mid-April 2026, life was simpler for Claude Code users: Opus 4.6 was directly selectable in the model picker, and Fast Mode tokens ran straight against the plan allowance of a Pro or Max subscription. If you had a plan, you could enable Fast Mode without thinking about additional billing paths — usage went against the limit you were already paying for.
“Extra usage” existed as a feature, but as an optional safety net: if you accidentally went over the plan limit, you could turn it on and keep working at a surcharge. If you didn’t want it, you left it off — and a normal subscription was enough.
What applies now
With the Opus 4.7 launch on April 16, 2026, Anthropic quietly made three shifts:
1. Opus 4.6 is gone from the picker. GitHub Issue #49689 documents that Opus 4.6 is no longer selectable in the Desktop Code tab’s model picker after the 4.7 release. Only “Opus” is offered — resolving to Opus 4.7. To go back to 4.6, you have to enter the model name explicitly in settings (claude-opus-4-6) or set the environment variable ANTHROPIC_DEFAULT_OPUS_MODEL=claude-opus-4-6. In the CLI, /model with a version suffix works; in the Desktop Code tab, the picker workaround doesn’t.
2. Fast Mode is locked to extra usage. The official Fast Mode docs state it clearly: Fast Mode tokens for Pro, Max, Team, and Enterprise subscriptions count exclusively to the extra-usage counter. Plan limits are not consumed for them. In other words: Fast Mode costs additional money from the very first token, no matter which subscription is underneath. Without the extra-usage toggle on, Fast Mode is fully blocked — the CLI replies with “Fast mode requires extra usage billing · /extra-usage to enable”.
3. Opus 4.7 burns limits faster. The new tokenizer in Opus 4.7 produces up to 35% more tokens for the same text than Opus 4.6. Concretely: switching to 4.7 makes your plan limit shrink noticeably faster — which adds pressure toward extra usage and Fast Mode. Combined with the first two points, a new pattern emerges: more consumption, fewer options, more paths that lead to extra costs.
Why almost nobody noticed
The changes are documented in the official pricing and Fast Mode pages — but they’re not communicated prominently as a release note. Anyone who uses the model picker and doesn’t follow patch notes only finds out when Opus 4.6 disappears from the dropdown after an update, or when /fast replies with the extra-usage warning. That’s exactly what the linked GitHub issue describes: users who updated after April 16 can no longer find Opus 4.6 — and aren’t actively informed about it.
There’s no official Anthropic statement that frames these three changes as a single connected policy shift. The user impression mirrored in the issues: it’s a gradual repricing — Opus 4.6 as the cheaper option becomes less visible, Fast Mode is billed more expensively, and at the same time the new tokenizer in 4.7 makes everything a bit more expensive per task.
What you can do now
If you want to stay on Opus 4.6: Set claude-opus-4-6 explicitly via Claude Code settings or via the ANTHROPIC_DEFAULT_OPUS_MODEL environment variable. That bypasses the picker, which would otherwise auto-route you to 4.7.
If you’re considering Fast Mode: In your Anthropic account, set an explicit monthly cap under extra usage (e.g. €43 in the screenshot). That way an accidentally-left-on Fast Mode can’t run up unwanted costs. We’ve covered exactly how to enable Fast Mode and when it’s worth it in the linked blog post.
If the higher consumption of Opus 4.7 hits you: Read our practice notes on Opus 4.7’s token appetite — and consider whether for many of your tasks Opus 4.6 still remains the more economical choice, especially without Fast Mode.
Practical guide
How to enable Fast Mode correctly, what it concretely costs, and when it pays off: → Claude Code: How to enable Fast Mode for Opus 4.6
Entdecke mehr
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