Anthropic ↗Released October 1, 2025

Claude Haiku 4.5

#15 Arena RankUndisclosed parameters

Context

200K

Input

$1.00

Key Specifications

🏆

Arena Rank

#15

📐

Context Window

200K

📥

Input Price

per 1M tokens

$1.00

📤

Output Price

per 1M tokens

$5.00

🧠

Parameters

Undisclosed

🔒

Open Source

No

Best For

Fast responsesclassificationextraction

About Claude Haiku 4.5

Claude Haiku 4.5 is Anthropic's fastest and most affordable model in the Claude family, designed for high-throughput applications where speed and cost-efficiency are paramount. Despite being the lightest model in the lineup, it delivers surprisingly strong performance on classification, extraction, summarization, and simple reasoning tasks. With a 200K context window and pricing at just $1.00 per million input tokens, it's ideal for processing large volumes of data quickly — from customer support triage to content moderation to data extraction. Haiku 4.5 responds in milliseconds, making it suitable for real-time applications where users expect instant responses. It's the go-to choice for builders who need Claude's safety and quality characteristics at scale.

Built byAnthropic↗

Pricing per 1M tokens

Input Tokens

$1.00

Output Tokens

$5.00

Compare Claude Haiku 4.5

See how Claude Haiku 4.5 stacks up against other leading AI models

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Frequently Asked Questions

What is Claude Haiku 4.5?▾
Claude Haiku 4.5 is Anthropic's fastest and most affordable model in the Claude family, designed for high-throughput applications where speed and cost-efficiency are paramount. Despite being the lightest model in the lineup, it delivers surprisingly strong performance on classification, extraction, summarization, and simple reasoning tasks. With a 200K context window and pricing at just $1.00 per million input tokens, it's ideal for processing large volumes of data quickly — from customer support triage to content moderation to data extraction. Haiku 4.5 responds in milliseconds, making it suitable for real-time applications where users expect instant responses. It's the go-to choice for builders who need Claude's safety and quality characteristics at scale.
How much does Claude Haiku 4.5 cost?▾
Claude Haiku 4.5 costs $1.00 per 1 million input tokens and $5.00 per 1 million output tokens. Pricing is based on token usage, making it cost-effective for both small and large-scale applications.
What is Claude Haiku 4.5's context window?▾
Claude Haiku 4.5 has a context window of 200K tokens. This determines how much text the model can process in a single request — larger context windows allow the model to handle longer documents, maintain more conversation history, and reason over bigger codebases.
Is Claude Haiku 4.5 open source?▾
No, Claude Haiku 4.5 is a proprietary model available through Anthropic's API. Proprietary models are typically accessible via API endpoints and offer managed infrastructure, support, and regular updates from the provider.
What is Claude Haiku 4.5 best for?▾
Claude Haiku 4.5 is best suited for: Fast responses, classification, extraction. These use cases leverage the model's specific strengths in terms of capability, speed, and cost-effectiveness within Anthropic's model lineup.