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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

One change

Speed up responses with fast mode

fast-mode

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Nearest release: v2.1.246, published under an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

fast-mode Changed · +3 / -3 lines

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 What to know:
 
-* Use `/fast` to toggle on fast mode in the Claude Code CLI. Fast mode is not supported in the VS Code extension.
+* Use `/fast` to toggle on fast mode in the Claude Code CLI. The VS Code extension follows your [`fastMode` setting](#toggle-fast-mode) and offers a **Toggle fast mode** command when the selected model supports fast mode.
 * Fast mode pricing per MTok input/output is \$10/\$50 on Opus 5 and Opus 4.8.
 * Available to Claude Code users on subscription plans (Pro/Max/Team/Enterprise) and on Claude Console. Team and Enterprise organizations need an Owner to enable it first, and Console organizations need access provisioned first, both described under [Requirements](#requirements).
 * For Claude Code users on subscription plans (Pro/Max/Team/Enterprise), fast mode is available via usage credits only and not included in the subscription rate limits.
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 ## Toggle fast mode
 
-Toggle fast mode in either of these ways:
+In the CLI, toggle fast mode in either of these ways:
 
 * Type `/fast` and press Tab to toggle on or off
 * Set `"fastMode": true` in your [user settings file](/docs/en/settings)
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 If you run out of usage credits mid-session, Claude Code retries each rejected fast mode request at standard speed and pricing, so you keep working, and there is no cooldown. How you see the rejection depends on the session type:
 
 * In an interactive session, Claude Code shows a "Fast mode disabled · usage credits exhausted" notification and turns fast mode off for the rest of the session. Your saved fast mode preference doesn't change; run `/fast` to turn fast mode back on.
-* In [non-interactive mode](/docs/en/headless) with `--output-format stream-json`, and through the Agent SDK, Claude Code emits the same text on the message stream as a `system` message with subtype `notification`, once per turn while you're out of usage credits. Fast mode stays on.
+* In [non-interactive mode](/docs/en/headless) with `--output-format stream-json`, and through the Agent SDK, Claude Code emits the same text on the message stream as a `system` message with subtype `notification`, once per turn while you're out of usage credits. Fast mode stays on. Requires Claude Code v2.1.221 or later.
 
 ## Research preview