What's new in Claude

Claude in Chrome is now generally available — background agents can now send desktop notifications and auto-create PRs. Also adds the new /dataviz skill and AWS gateway support for remote sessions.

Claude Sonnet 5 is now the default model in Claude Code, bringing a native 1M-token context window and introductory pricing of $2/$10 per MTok through August 31, 2026.

claude mcp login — authenticate a configured MCP server directly from the shell instead of the interactive /mcp menu; claude mcp logout clears stored credentials later.

Shell mode responds to command output — running ! npm test now automatically surfaces an explanation without needing a follow-up prompt.

/rewind across /clear — you can now rewind a conversation back to before /clear was run, recovering context that was previously lost.

Background subagent permission prompts — instead of auto-denying, background subagents now surface permission prompts up to the main session so you can approve them in place.

Claude Fable 5 and Mythos 5 restored — access to both models is back following a brief suspension. See Anthropic's statement for details on the redeployment.

Claude Sonnet 5 launched (claude-sonnet-5) — $2/$10 per MTok intro pricing through Aug 31 (standard $3/$15 after); 1M token context window; 128k max output. Adaptive thinking is now on by default; manual extended thinking removed. Uses a new tokenizer that produces ~30% more tokens for the same text.

Managed Agents: event deltas + session config overrides — stream partial agent message text before the full event arrives via event_deltas[]. Override any agent's model, system prompt, tools, or MCP servers for a single session with agent_with_overrides.

Managed Agents webhooks expanded — new events cover agent version publish, deployment pause, and scheduled run failures, so you no longer need to poll for lifecycle changes.

Fast mode removed for Claude Opus 4.6 — requests with speed: "fast" now run at standard speed and standard rates without error. Migrate to Opus 4.8 to keep using fast mode.

Claude Sonnet 5 is here. Top-tier performance on coding and tool use at Sonnet pricing, with a 1M context window. It's the new default in Claude Code for Pro users, and available everywhere on the Claude Platform, including the API and Managed Agents.

Introducing Claude Sonnet 5 — our most agentic Sonnet yet. Makes plans, uses tools like browsers and terminals, and runs autonomously on long tasks.