Claude Haiku 4.5
Overview
Claude Haiku 4.5 is a language model developed by Anthropic, released on October 15, 2025. It is designed to offer near-frontier performance with enhanced speed and cost efficiency compared to its predecessor, Claude Sonnet 4.5. The model features a 200,000-token context window and supports up to 64,000 tokens in output, accommodating complex tasks that require extensive context. It is optimized for low-latency applications, making it suitable for real-time tasks such as chatbots, customer support automation, and rapid coding iteration. In terms of technical specifications, Claude Haiku 4.5 is available through multiple providers, including Amazon Bedrock, Microsoft Azure AI, and Google Vertex AI, with pricing starting at $1.00 per million input tokens and $5.00 per million output tokens. The model supports multiple input modalities, including text, image, and PDF, and outputs text. Its knowledge cutoff is in July 2025, and it is scheduled for deprecation on October 15, 2026. Benchmark performance varies across different tasks, with the model achieving an Intelligence Index of 31.0 and a Coding Index of 29.6. However, it has been observed to exhibit higher hallucination rates compared to some peers, with a rate of 4.62% in generating non-existent package names.