An Overview of Claude Haiku 4.5

Introducing Claude Haiku 4.5

• 🚀 Anthropic has released Claude Haiku 4.5, their newest, smallest, and most affordable model, nearly a year after the last Haiku release.
• 💰 It is currently the cheapest Anthropic model at $1 per million input tokens and $5 per million output tokens, costing about a third of Sonnet.

Performance and Capabilities

• 💡 Haiku 4.5 matches the performance of Claude Sonnet 4 from five months prior, which was considered a very good model.
• 🧠 It includes an extended thinking mode for tackling harder problems and is proficient in coding tasks and computer use.
• ⚡ Early estimates suggest Haiku 4.5 is 2 to 5 times faster than Sonnet 4.5 for most use cases.

Recommended Use Cases

• ✅ Consider Haiku 4.5 for simpler coding tasks, implementation work, and scenarios requiring fast customer support interactions.
• 🎯 It is ideal for cost-sensitive applications and multi-agent systems needing numerous smaller, specialized agents.
• ⚠️ For complex coding tasks requiring deep reasoning or frontier model capabilities where quality is paramount, Sonnet 4.5 remains the recommended choice.

Letta Cloud Integration & Demo

• 💻 Claude Haiku 4.5 is now available within Letta Cloud, allowing users to select and configure it for agent creation.
• 🎨 A live demonstration showed Haiku 4.5 successfully generating an SVG image of a pelican riding a bicycle, a test popularized by Simon Willison.

Multi-Agent System Orchestration

• 🧩 Haiku 4.5 is well-suited for multi-agent systems, where a team of Haiku agents can complete subtasks in parallel.
• 🤝 Anthropic highlights the potential for Sonnet to orchestrate these multi-agent systems, with individual sub-agents leveraging Haiku 4.5.