Claude Sonnet 5.5

Reading Time: 6 minutesClaude Code version 2.1.284 promotes Claude Sonnet 5.5 — with a 1 million token context window — to the default Sonnet model on the Anthropic API, while adding real-time spend tracking to the gateway status line and fixing dozens of error-handling, plugin, and MCP reliability issues. Non-technical users and team leads benefit most from the new cost visibility and cleaner failure recovery, though several improvements only activate once the Claude apps gateway is also updated to this version.