Anthropic launches Claude Haiku 4.5 with frontier-level performance

Investing.com -- Anthropic released Claude Haiku 4.5 on Wednesday, offering users a small AI model that delivers performance similar to the previous frontier model Claude Sonnet 4 but at one-third the cost and more than twice the speed.

The new model even surpasses Claude Sonnet 4 in certain capabilities, particularly when using computers, making applications like Claude for Chrome faster and more useful.

Claude Haiku 4.5 is designed for real-time, low-latency tasks such as chat assistants, customer service agents, and pair programming. Users of Claude Code will experience a more responsive coding environment, from multiple-agent projects to rapid prototyping.

While Claude Sonnet 4.5, released two weeks ago, remains Anthropic’s frontier model and what they describe as "the best coding model in the world," Haiku 4.5 provides a cost-efficient alternative with near-frontier performance.

The company suggests new ways of using their models together, such as having Sonnet 4.5 break down complex problems and orchestrate multiple Haiku 4.5 instances to complete subtasks in parallel.

Claude Haiku 4.5 is available immediately across all platforms. Developers can access it via the Claude API using "claude-haiku-4-5" with pricing at $1/$5 per million input and output tokens.

Safety evaluations show Claude Haiku 4.5 demonstrated low rates of concerning behaviors and improved alignment compared to its predecessor. According to Anthropic’s automated alignment assessment, it showed a statistically significantly lower rate of misaligned behaviors than both Claude Sonnet 4.5 and Claude Opus 4.1.

Due to limited risks related to the production of chemical, biological, radiological, and nuclear weapons, Anthropic released Haiku 4.5 under the AI Safety Level 2 standard, less restrictive than the ASL-3 classification used for Sonnet 4.5 and Opus 4.1.

The model is available on Claude Code, Anthropic’s apps, Amazon Bedrock, and Google Cloud’s Vertex AI, serving as a replacement for both Haiku 3.5 and Sonnet 4 at Anthropic’s most economical price point.

This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.