Anthropic Launches Haiku 5.5: Its Cheapest and Fastest Claude Model Yet

In brief

• Anthropic released Claude Haiku 5.5 at $0.10 per million input tokens and $0.50 per million output tokens for prompts up to 100,000 tokens, down from $1 and $5 for Haiku 4.5.
• Haiku 5.5 scored 72.4% on the OSWorld 2.1 offline subset and 39.2% on Terminal-Bench 4.0, ahead of OpenAI's GPT-6 Luna on both but well behind Sonnet 5.5's 70.6% on the coding test.
• Anthropic also halved Sonnet 5.5's cache-read price to $0.10 per million tokens and is adding monthly API credits for Max and Team subscribers this week.

Anthropic released Claude Haiku 5.5 on Wednesday, calling it the cheapest, fastest and most capable small model it has made. It targets high-volume chores such as summarizing documents and querying databases, plus speed-sensitive jobs like live customer support and operating a web browser for the user.

Developers who plug Claude into their own products pay $0.10 per million input tokens and $0.50 per million output tokens for prompts up to 100,000 tokens. Tokens are the small chunks of text, roughly three-quarters of a word, that AI models read and write—and they’re what big AI companies bill by. That matches the rate OpenAI set for GPT-6 Luna, its rival small model, when it launched on September 22.