Claude Code v2.1.293 - Haiku 5.5 Added and Stability Improvements

Anthropic released Claude Code v2.1.293. The new Claude Haiku 5.5 model (1M token context, $0.10/$0.50/Mtok) has been added as the default Haiku model. A bug wh

Claude Code · Release v2.1.293 · 2026-10-07

Anthropic released Claude Code v2.1.293. The new Claude Haiku 5.5 model (1M token context, $0.10/$0.50/Mtok) has been added as the default Haiku model. A bug where Claude would re-execute or retract completed tasks after context compression has been fixed. Multiple stability issues including message loss when sessions move to background, MCP connection memory leaks, and permission rule violations have been resolved.

weltiq perspective: weltiq users can leverage the more affordable Haiku 5.5 model when automating strategy development and backtesting through the Claude API, and improved session stability increases reliability for long-running tasks.

Release Notes Excerpt

What's changed Added Claude Haiku 5.5 ( claude-haiku-5-5 ), now the default Haiku model on the Anthropic API — 1M context, $0.10/$0.50 per Mtok ($0.50/$2.50 for prompts over 100K) Added agentType to the subagentStatusLine payload, so scripts can tell custom subagent types apart Added isDeferred to $.tool.register for mods: false lists the tool's schema in the prompt from the start instead of behind tool search Fixed Claude sometimes treating its own last actions before a context compaction as done after it, and retracting or redoing finished work Fixed a memory leak where an HTTP MCP connection kept every request it had sent until it closed Fixed a message sent while Claude was working being…

Source: https://github.com/anthropics/claude-code/releases/tag/v2.1.293