Week 30 · July 20–24, 2026 changedwhats-new/2026-w30
Nearest release: v2.1.301, published 4 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
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33> Opus 5 becomes the default Opus model, Claude Code Desktop adds an iOS Simulator pane, and the Claude Security plugin scans your code for vulnerabilities.
44
5Releases [v2.1.214 → v2.1.219](/docs/en/changelog#2-1-214)
5Releases [v2.1.214 → v2.1.219](/docs/en/changelog.md#2-1-214)
663 features · July 20–24
77
88Claude Opus 5
99new model
1010
11Claude Opus 5 is the new default Opus model in Claude Code. It's the default on Max, Team Premium, Enterprise pay-as-you-go, and the Anthropic API, and on Claude Platform on AWS, Amazon Bedrock, and Google Cloud's Agent Platform. On the Anthropic API and on Max, Team, and Enterprise plans, Opus 5 runs with a [1M-token context window](/docs/en/model-config#extended-context); on Amazon Bedrock and Google Cloud's Agent Platform, select the 1M model variant. Fast mode moves to Opus 5 at \$10/\$50 per MTok. Requires v2.1.219 or later.
11Claude Opus 5 is the new default Opus model in Claude Code. It's the default on Max, Team Premium, Enterprise pay-as-you-go, and the Anthropic API, and on Claude Platform on AWS, Amazon Bedrock, and Google Cloud's Agent Platform. On the Anthropic API and on Max, Team, and Enterprise plans, Opus 5 runs with a [1M-token context window](/docs/en/model-config.md#extended-context); on Amazon Bedrock and Google Cloud's Agent Platform, select the 1M model variant. Fast mode moves to Opus 5 at \$10/\$50 per MTok. Requires v2.1.219 or later.
1212
1313<video autoPlay muted loop playsInline src="https://mintcdn.com/claude-code/N3yEaTYPXMXFrF6k/images/whats-new/opus-5.mp4?fit=max&auto=format&n=N3yEaTYPXMXFrF6k&q=85&s=8536b1cb3180e539008f39930403e47b" />
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1818> /model claude-opus-5
1919```
2020
21[Model configuration](/docs/en/model-config#available-models)
21[Model configuration](/docs/en/model-config.md#available-models)
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2323iOS Simulator in Claude Code Desktop
2424Desktop
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3333> Build the app and run it in the simulator to check the onboarding flow.
3434```
3535
36[Test iOS apps in the simulator](/docs/en/desktop-ios-simulator#run-your-app-in-the-simulator)
36[Test iOS apps in the simulator](/docs/en/desktop-ios-simulator.md#run-your-app-in-the-simulator)
3737
3838Claude Security plugin
3939plugin
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4646> /plugin install claude-security@claude-plugins-official
4747```
4848
49[Scan and fix your codebase](/docs/en/claude-security#scan-and-fix-your-codebase)
49[Scan and fix your codebase](/docs/en/claude-security.md#scan-and-fix-your-codebase)
5050
5151Other wins
5252
53[`/code-review`](/docs/en/code-review-local) now runs as a background subagent with its own context window, so review work stays out of your conversation and the findings arrive when it completes`/verify`, `/code-review`, and `/deep-research` run only when you invoke them; Claude no longer launches them on its own[Emoji shortcodes](/docs/en/interactive-mode#emoji-shortcodes) autocomplete in the prompt input: type `:heart:` to insert an emoji, or two or more characters after `:` for suggestions; turn it off with `emojiCompletionEnabled`Skills with `context: fork` [run in the background](/docs/en/skills#run-skills-in-a-subagent) by default, and `background: false` in the skill's frontmatter waits for the result in the same turnA session runs up to 20 subagents concurrently by default; change the [limit](/docs/en/sub-agents#concurrent-subagent-limit) with `CLAUDE_CODE_MAX_CONCURRENT_SUBAGENTS``--max-budget-usd` now enforces the cap on subagents: once spend reaches it, Claude can't start more and running background subagents stopNew [`sandbox.filesystem.disabled`](/docs/en/sandboxing#disable-filesystem-isolation) setting skips filesystem isolation while keeping network egress controlIn auto mode, the checks for dangerous `rm` commands, background jobs, and suspicious Windows paths no longer open permission dialogs; the auto-mode classifier adjudicates them insteadBash permission checks fail closed on more shell forms, including file-descriptor redirects, Zsh variable subscripts in `[[ ]]` comparisons, `help` and `man` invocations that could run unsafe options, and commands over 10,000 characters[Fast mode](/docs/en/fast-mode) no longer supports Opus 4.7: `/fast` now applies to Opus 5 and Opus 4.8Long-running tool calls emit a periodic progress heartbeat instead of going silent
53[`/code-review`](/docs/en/code-review-local) now runs as a background subagent with its own context window, so review work stays out of your conversation and the findings arrive when it completes`/verify`, `/code-review`, and `/deep-research` run only when you invoke them; Claude no longer launches them on its own[Emoji shortcodes](/docs/en/interactive-mode.md#emoji-shortcodes) autocomplete in the prompt input: type `:heart:` to insert an emoji, or two or more characters after `:` for suggestions; turn it off with `emojiCompletionEnabled`Skills with `context: fork` [run in the background](/docs/en/skills.md#run-skills-in-a-subagent) by default, and `background: false` in the skill's frontmatter waits for the result in the same turnA session runs up to 20 subagents concurrently by default; change the [limit](/docs/en/sub-agents.md#concurrent-subagent-limit) with `CLAUDE_CODE_MAX_CONCURRENT_SUBAGENTS``--max-budget-usd` now enforces the cap on subagents: once spend reaches it, Claude can't start more and running background subagents stopNew [`sandbox.filesystem.disabled`](/docs/en/sandboxing#disable-filesystem-isolation) setting skips filesystem isolation while keeping network egress controlIn auto mode, the checks for dangerous `rm` commands, background jobs, and suspicious Windows paths no longer open permission dialogs; the auto-mode classifier adjudicates them insteadBash permission checks fail closed on more shell forms, including file-descriptor redirects, Zsh variable subscripts in `[[ ]]` comparisons, `help` and `man` invocations that could run unsafe options, and commands over 10,000 characters[Fast mode](/docs/en/fast-mode.md) no longer supports Opus 4.7: `/fast` now applies to Opus 5 and Opus 4.8Long-running tool calls emit a periodic progress heartbeat instead of going silent
5454
55[Full changelog for v2.1.214–v2.1.219 →](/docs/en/changelog#2-1-214)
55[Full changelog for v2.1.214–v2.1.219 →](/docs/en/changelog.md#2-1-214)
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