The fastest, most affordable coding model
Anthropic just unveiled Claude Haiku 4.5, its fastest and most efficient small model yet. Haiku 4.5 matches the coding performance of Claude Sonnet 4, once a frontier model, but now runs 2x faster and costs one-third as much. I
Haiku 4.5 delivers near-frontier coding quality at one-third the cost of Sonnet 4 and more than twice the speed, making it ideal for real-time, low-latency applications like chat assistants and customer service agents that need responsive interactions without high operational costs
Haiku 4.5 enables cost-effective parallel processing of subtasks; frontier models like Sonnet 4.5 can break down complex problems into plans and orchestrate teams of multiple Haiku 4.5 instances to complete work in parallel, reducing overall latency and cost
Haiku 4.5's combination of high intelligence and remarkable speed makes it ideal for IDE integrations like GitHub Copilot and development environments where instantaneous responsiveness and real-time feedback loops are essential for user experience
Haiku 4.5 achieves 90% of Sonnet 4.5's coding performance while running 4-5x faster, enabling developers to use it for pair programming, rapid prototyping, and code generation tasks where speed and responsiveness are critical
At $1/$5 per million input/output tokens, Haiku 4.5 provides similar coding performance to Claude Sonnet 4 at one-third the cost, allowing developers and organizations to accomplish more within usage budgets while maintaining premium model quality