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Claude Haiku 4.5 - Anthropic's latest small AI model

Claude Haiku 4.5 is Anthropic's latest high-performance, low-cost small AI model. Its coding performance is comparable to the previous flagship model, Claude Sonnet 4, and it performs even better in certain tasks...

What is Claude Haiku 4.5?

Claude Haiku 4.5 is Anthropic's latest high-performance, low-cost, small AI model. Its coding performance is comparable to the previous flagship model, Claude Sonnet 4, and even surpasses it in some tasks, at only one-third the cost and more than twice the speed. The model boasts excellent alignment and security, achieving an AI Safety Level 2 (ASL-2) rating. It supports deployment via the Claude API, Amazon Bedrock, and Google Cloud's Vertex AI, making it suitable for real-time, low-latency tasks such as chat assistants, customer service agents, and programming assistance.

Main features of Claude Haiku 4.5

  • Coding abilityIt performs well in programming tasks, supports multiple programming languages, generates high-quality code, and is suitable for rapid prototyping and multi-agent collaborative projects.
  • Real-time interactionSuitable for low-latency tasks such as chat assistants, customer service agents, and pair programming, with fast response speed and a smooth user experience.
  • MultitaskingIt supports working with the flagship model Claude Sonnet 4.5 to break down complex problems into multiple subtasks for parallel processing, significantly improving efficiency.
  • High securityAfter thorough security and alignment testing, it exhibits a low rate of undesirable behavior and is one of Anthropic's most secure models to date.
  • Cost-effectivenessThe price is only one-third of that of Claude Sonnet 4, with $1 per million input tokens and $5 per million output tokens, making it extremely cost-effective.

Claude Haiku 4.5 performance

  • Programming skills:
    • SWE-bench VerifiedIt achieved an accuracy rate of 73.3%, comparable to Claude Sonnet 4 (72.7%), and close to the industry's top level.
    • Terminal-BenchWith a score of 41.0%, it outperformed Claude Sonnet 4 (36.4%).
    • OSWorldWith a score of 50.7%, significantly higher than Claude Sonnet 4 (42.2%), it performed exceptionally well in computer usage tasks.
  • Mathematical ability:
    • Python tool supportAchieving an accuracy rate of 96.3% demonstrates excellent performance.
    • No tool supportIt achieved an accuracy of 80.7%, which is lower than that of models with tool support, but still higher than many large models.
  • Multilingual ability:
    • MMMLUThe average accuracy rate was 73.3% across 14 non-English languages, demonstrating good multilingual comprehension capabilities.

Claude Haiku 4.5 project address

  • Project official websitehttps://www.anthropic.com/news/claude-haiku-4-5

Application Scenarios of Claude Haiku 4.5

  • Programming AssistantIt provides developers with code generation, debugging suggestions, and rapid prototyping support, improving programming efficiency and is suitable for multi-agent collaborative projects.
  • Chat AssistantUsed to build chatbots that respond in real time, quickly process user requests, and provide a smooth interactive experience.
  • Customer service agentIt helps customer service staff quickly answer customer questions, provide accurate information support, and improve customer satisfaction.
  • Pair programmingIt assists programmers in writing code and optimizing logic, providing real-time feedback and improvement suggestions to enhance programming quality.
  • Educational guidanceIt provides students with programming learning guidance, helps them understand complex concepts, and generates practice questions and solutions.
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