# Claude Code 2.1.219: Claude Opus 5 becomes the default Opus model

> Adds `claude-opus-5` with a 1M context window as the new default Opus model, priced at $10/$50 per Mtok in fast mode. Also raises the default subagent nesting depth from 1 to 3 and drops Opus 4.7 from fast mode, both of which change behavior for existing setups.

| | |
|---|---|
| **Tool** | Claude Code |
| **Version** | 2.1.219 |
| **Kind** | release |
| **Published** | 2026-07-24 |
| **Observed** | 2026-08-11 |
| **Significance** | 5/5 |
| **Breaking** | no |
| **Categories** | new-model, model-support, pricing, context-window, feature, fix |

## What changed


- Added Claude Opus 5 (`claude-opus-5`), now the default Opus model — 1M context, fast mode at $10/$50 per Mtok
- Removed Opus 4.7 from fast mode; `/fast` now applies to Opus 5 and Opus 4.8
- The `claude-api` skill now defaults to Claude Opus 5, with a migration path from Opus 4.8
- Subagents can spawn nested subagents up to depth 3 by default (was 1); set `CLAUDE_CODE_MAX_SUBAGENT_SPAWN_DEPTH=1` to disable nesting
- Added `sandbox.network.strictAllowlist` to deny non-allowlisted hosts for sandboxed commands without prompting
- Added a `DirectoryAdded` hook firing after `/add-dir` or the SDK `register_repo_root` control request
- Added `mcp_server_errors` to the headless stream-json init event, listing `--mcp-config` entries skipped by config validation
- Added nested subagent forwarding in stream-json for depth-2+ subagents under `--forward-subagent-text`
- Added the `workflowSizeGuideline` settings key; dynamic workflows now default to a medium size guideline (aim for fewer than 15 agents)
- `claude mcp list` and `/mcp` now show HTTP status and error text on connection failure
- Fixed `claude -p` dropping an already-produced answer when a turn dies on a mid-stream API error
- Fixed `CLAUDE_CODE_GIT_BASH_PATH` on Windows being used when the path isn't a bash/sh binary; it's now ignored with a warning


## Sources

- [changelog_md](https://github.com/anthropics/claude-code/blob/main/CHANGELOG.md) — retrieved 2026-08-11

## Community

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Canonical: https://changelogs.info/claude-code/2-1-219
Entity: https://changelogs.info/claude-code
Event ID: `evt_2026-07-24_claude-code_2-1-219`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.