Claude Haiku 4.5

About Claude Haiku 4.5

Claude Haiku 4.5 is Anthropic's fastest model in the Claude 4 generation, engineered for applications demanding instant responses. The model delivers impressive capability at remarkably low latency, often responding in under a second. Claude Haiku 4.5 features a substantial context window and supports vision inputs for multimodal applications. It excels at real-time chat, content moderation, data extraction, and high-throughput processing. Despite its focus on speed, Haiku maintains strong performance on reasoning and coding tasks. For developers building responsive AI experiences where every millisecond matters, Claude Haiku 4.5 offers the best combination of speed, capability, and affordability in Anthropic's lineup.

Model Specifications

💰 Real-World Cost Examples

Estimated monthly costs for common use cases

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🚀 Quick Start

Get started with Claude Haiku 4.5 API

import anthropic

client = anthropic.Anthropic()

message = client.messages.create(
    model="anthropic/claude-4.5-haiku-20251001",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(message.content[0].text)

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