Anthropic、「Claude Haiku 5.5」公開 「Haiku 4.5」から大幅性能向上で利用コスト約75%減
Anthropicは、小型AIモデル「Claude Haiku 5.5」を発表した。前世代から性能を大きく引き上げつつ、コストを約75%削減。推論の深さを調整するeffort設定に初対応し、コンピュータ操作や大量の定型処理、上位モデルのサブエージェント向けに全プラットフォームで即日提供された。

Anthropic has released the latest version of its small AI model, Claude Haiku 5.5, which offers significant performance improvements and a 75% reduction in costs compared to its predecessor, Claude Haiku 4.5.
What happened
Anthropic announced the release of Claude Haiku 5.5, a small AI model with significant performance improvements and a 75% reduction in costs compared to its predecessor. The model includes an 'effort' setting for adjusting reasoning depth and is optimized for cost-sensitive tasks.
Why it matters
The release of Claude Haiku 5.5 offers businesses and developers a cost-effective solution for tasks requiring high throughput and efficiency, such as customer support and data processing. Its performance improvements and cost reduction can enhance operational efficiency and reduce expenses.
- Claude Haiku 5.5 offers significant cost savings and performance improvements over its predecessor.
- The 'effort' setting provides flexibility in balancing cost and accuracy for different tasks.
- It is optimized for tasks requiring high throughput and efficiency, making it suitable for a wide range of applications.
The bigger picture
The model's cost reduction and performance improvements can lead to more efficient use of AI in cost-sensitive applications, potentially increasing adoption and reducing operational costs for businesses.
Anthropic's release of Claude Haiku 5.5 marks a significant advancement in small AI models, offering improved performance and reduced costs, making it a valuable tool for businesses and developers focused on cost-effective AI solutions.
Technical details
- 'Effort' setting: Adjusts the depth of reasoning, allowing users to choose between cost and accuracy.
- Support for computer and browser use via updated SDKs (Python and TypeScript).
- Benchmark results showing improvements over Haiku 4.5 in tasks like OSWorld 2.1 and reduced prompt injection vulnerability.
FAQ
What is Claude Haiku 5.5?
Claude Haiku 5.5 is the latest version of Anthropic's small AI model, offering improved performance and a 75% reduction in costs compared to its predecessor, Haiku 4.5.
What are the key features of Claude Haiku 5.5?
Key features include an 'effort' setting for adjusting reasoning depth, cost reduction, and optimization for tasks like summarization and data processing.
How does Claude Haiku 5.5 compare to previous models?
It offers significant performance improvements over Haiku 4.5 and is optimized for cost-sensitive tasks, though it may not match the capabilities of larger models like Opus 5.5 and Sonnet 5.5 for complex tasks.
This summary and analysis were generated with AI from the original article and may contain errors. Read the original for the full story.
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Originally published by ITmedia AI - Japan on Oct 7, 2026.
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