Anthropic变身性价比屠夫，新模型匹敌Sonnet 4，成本仅1/3

Core Insights - Anthropic has launched a new inference model, Claude Haiku 4.5, which is smaller, cheaper, and faster than its predecessor Claude Sonnet 4, offering similar programming performance at one-third the cost and more than double the speed [1][5]. Pricing and Availability - Claude Haiku 4.5 is available for free users and can be accessed via Claude API for developers, priced at $1 per million tokens for input and output [3][5]. - The pricing structure for Claude models shows that Haiku models are typically one-third the cost of Sonnet models, which are one-fifth the cost of Opus models [5]. Performance Metrics - In benchmark tests, Claude Haiku 4.5 outperformed Claude Sonnet 4 in multiple tasks, indicating its enhanced utility in applications like the Claude for Chrome browser agent [6]. - The model's performance on the SWE-bench Verified test set is comparable to Claude Sonnet 4 and OpenAI's GPT-5 [1][7]. Model Features - Claude Haiku 4.5 incorporates a hybrid reasoning model that allows for quick responses while also offering an "extended thinking mode" for more complex queries, a feature not present in its predecessor [8]. - The model has improved context awareness and can provide precise information about context window usage, enhancing its reasoning capabilities [8]. Safety and Compliance - Safety assessments indicate that Claude Haiku 4.5 has a high harmless response rate of 99.38%, comparable to other models in the Claude series [11]. - The model shows a low refusal rate for benign requests at 0.02%, significantly lower than its predecessor Claude Haiku 3.5 [13]. Competitive Positioning - Anthropic is currently valued at $183 billion and is serving over 300,000 enterprise customers, with an annual revenue run rate nearing $7 billion [18]. - Despite its advancements, Anthropic is still working to catch up with competitors like Google and OpenAI, as indicated by the rapid release cycle of its models [18].