What's new in Claude

Claude Sonnet 5 sessions no longer use the mid-conversation system role for harness reminders, simplifying session structure.

AskUserQuestion dialogs no longer auto-continue by default — opt into an idle timeout via /config — and the default permission mode is now "Manual" across all interfaces.

claude mcp login — authenticate a configured MCP server directly from your shell instead of the interactive /mcp menu, and clear stored credentials with claude mcp logout.

Shell mode responds to command output — running ! npm test now gets an explanation from Claude without needing a second prompt.

/rewind across /clear — you can now resume a conversation from before a /clear was run, recovering context you thought was gone.

Background subagent permission prompts — permission requests from background subagents now surface in the main session instead of being auto-denied, so you stay in control without babysitting.

Claude Fable 5 & Mythos 5 restored — both models are available again globally following new classifier deployment targeting cybersecurity tasks; some routine coding tasks may be affected in the near term.

Claude Sonnet 5 launched — claude-sonnet-5 with 1M context window and 128k max output at introductory pricing of $2/$10 per MTok through August 31 (standard $3/$15 thereafter). Note: adaptive thinking is now on by default, manual extended thinking is removed, and the new tokenizer produces ~30% more tokens.

Managed Agents event deltas — session event streams now support streaming deltas, letting you preview agent message text as it's generated before the complete event arrives. Opt in with the event_deltas[] query parameter.

Fast mode removed from Opus 4.6 — requests to claude-opus-4-6 with speed: "fast" now run at standard speed and standard billing. Migrate to Opus 4.8 to continue using fast mode.

Claude Code weekly limits are increasing 50%, now through July 13. Live now for all Pro, Max, Team, and seat-based Enterprise users. Also: Artifacts in Claude Code now available on Pro and Max plans — ask for an artifact, Claude writes the code, publishes it live to claude.ai, and updates it in real time.

Announcing "Built with Claude: Life Sciences" — a global virtual hackathon with a $100k prize pool in credits for building with Claude Science and Claude Code, in partnership with the Gladstone Institute. Also: Claude Fable 5 restored globally on July 1 after updated classifiers were deployed.

"Artifacts in Claude Code have been life changing. Excited to expand to Pro and Max!" — Boris Cherny, creator of Claude Code, reacting to the Artifacts expansion announcement.

Noted that Claude Fable 5 will come off subscriptions after July 7 due to capacity constraints, but Anthropic aims to restore it as a standard part of subscriptions as soon as capacity allows.