[Claude Code Launches Fast Mode Research Preview, Supporting Lower Latency Code Interaction] According to Claude Code Docs, Anthropic has launched a Fast Mode research preview for Claude Code, allowing for lower latency at higher costs on the Opus 4.7 and 4.6 models. Users can activate it by entering '/fast,' with pricing set at $30 per million tokens for input and $150 per million tokens for output. Pay-as-you-go billing must be enabled. This mode is primarily designed for high-interaction scenarios such as rapid code iteration and real-time debugging and is not suitable for batch processing or cost-sensitive tasks. The feature is disabled by default for Team and Enterprise accounts and requires manual activation by an administrator. When the independent rate limit is reached, the system will automatically revert to standard mode.