customer-support-chat changedabout-claude/use-case-guides/customer-support-chat
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188188The choice of model depends on the trade-offs between cost, accuracy, and response time.
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190For customer support chat, Claude Opus 5 is well suited to balance intelligence, latency, and cost, including the most complex support scenarios that require deep reasoning across long, multi-step conversations. However, for instances where you have conversation flow with multiple prompts including RAG, tool use, or long-context prompts, Claude Haiku 4.5 may be more suitable to optimize for latency.
190For customer support chat, Claude Opus 5 is well suited to balance intelligence, latency, and cost, including the most complex support scenarios that require deep reasoning across long, multi-step conversations. However, for instances where you have conversation flow with multiple prompts including RAG, tool use, or long-context prompts, Claude Haiku 5.5 may be more suitable to optimize for latency. [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) is its main control for speed: `low` is the fastest level, suited to chat and short tool tasks.
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192192### Build a strong prompt
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