Claude Code 2.1.319–2.1.323 adds MCP tasks, Code Mode, and cloud controls

Anthropic released Claude Code 2.1.319, 2.1.321, 2.1.322, and 2.1.323 between November 6 and 12, 2026. The changelog page has no 2.1.320 entry. Highlights include MCP tasks that continue in the background, Fable 5.2 as the default Fable model, fast mode on Vertex, and experimental Code Mode. (https://code.claude.com/docs/en/changelog)

Version 2.1.319: MCP tasks can continue in the background

Version 2.1.319, dated November 6, adds terminal support for MCP tasks. When a compatible MCP server runs a tool call as a task, Claude Code moves it to the background and gives Claude the result when it finishes. Set CLAUDE_CODE_DISABLE_MCP_TASK_BACKGROUND to make Claude Code wait for the task inside the tool call instead. The changelog also adds /tasks history for finished subagents, which can be reopened and messaged. (https://code.claude.com/docs/en/changelog)

Version 2.1.321: Fable 5.2 becomes the default Fable model

Version 2.1.321, dated November 9, adds claude-fable-5-2 as the default Fable model, with a 1M-token context window and listed pricing of $8/$40 per million tokens and $0.20 per million cache-read tokens. It also changes saved Fable 5.1 selections to move to Fable 5.2 under the plan conditions described in the changelog. Anthropic’s broader launch and standard model pricing are covered in our Claude Fable 5.1 and 5.2 update. (https://code.claude.com/docs/en/changelog)

Version 2.1.322: fast mode on Vertex

Version 2.1.322, dated November 10, adds fast mode on Vertex in the global, US, and EU regions. If Vertex refuses fast mode, Claude Code falls back to standard speed. (https://code.claude.com/docs/en/changelog)

Version 2.1.323: opt-in Code Mode and cloud-session changes

Version 2.1.323, dated November 12, adds experimental, opt-in Code Mode, in which Claude writes JavaScript to call its tools. The release also adds version constraints for plugins so a plugin outside its stated Claude Code version range is not installed, updated, or loaded. For Claude Code on the web, self-hosted environments gain a No repository option for new sessions. (https://code.claude.com/docs/en/changelog)

The same release changes the assumed context window for model IDs Claude Code does not recognize from 200K to 1M. Anthropic warns that sessions using other vendors’ models with smaller windows may fail once full unless the setting is disabled; set CLAUDE_CODE_DISABLE_1M_CONTEXT=1 to retain the previous assumption. Check the full changelog for security, provider, and platform-specific changes before updating managed environments. (https://code.claude.com/docs/en/changelog)

November 6: faster setup for cloud sessions

Anthropic’s official developer account also said Claude Code cloud sessions on Pro, Max, and Ultra can identify the dependencies, network access, and API keys a repository needs, then save the environment for later sessions. Anthropic said API keys are stored securely so Claude does not see them. This detail was announced on X; Claude Code’s cloud-environment documentation separately describes network secrets that let a session call an API without exposing the secret to Claude. (https://x.com/ClaudeDevs/status/2118795192090386454; https://code.claude.com/docs/en/cloud-environments)

Source

• Anthropic — Claude Code changelog (November 6–12, 2026): https://code.claude.com/docs/en/changelog
• ClaudeDevs on X — cloud-session setup for Pro, Max, and Ultra (November 6, 2026): https://x.com/ClaudeDevs/status/2118795192090386454
• Claude Code Docs — Configure cloud environments: https://code.claude.com/docs/en/cloud-environments