Claude Haiku 4.5

by Anthropic

Claude Haiku 4.5 is a model from Anthropic, released on October 15, 2025. It has a 200K-token context window and can generate up to 64K output tokens. API pricing is $1 per 1M input tokens and $5 per 1M output tokens. It ranks #99 of 220 models by Intelligence Score with a score of 25.6.

Claude Haiku 4.5 is Anthropic's fastest, most cost-efficient model, matching Sonnet 4's performance on coding, computer use, and agent tasks. It offers similar performance to Sonnet 4 at one-third the cost and more than twice the speed, making it ideal for high-volume, latency-sensitive applications and multi-agent orchestration.

Key specs

ProviderAnthropic
Release date2025-10-15
Licenseproprietary
Context window200K tokens
Max output64K tokens
Input price$1 / 1M tokens
Output price$5 / 1M tokens
Intelligence Score25.6
Coding index19.4
Output speed327 tokens/s
Time to first token0.87 s

Quick answers

What is the context window of Claude Haiku 4.5?

Claude Haiku 4.5 has a context window of 200K tokens, with a maximum output of 64K tokens per response.

How much does Claude Haiku 4.5 cost?

Claude Haiku 4.5 costs $1 per 1M input tokens and $5 per 1M output tokens through the API.

Is Claude Haiku 4.5 open source?

No. Claude Haiku 4.5 is a proprietary model from Anthropic (proprietary license).

When was Claude Haiku 4.5 released?

Anthropic released Claude Haiku 4.5 on October 15, 2025.

How does Claude Haiku 4.5 compare to Claude Opus 5.5 (Reasoning)?

Claude Haiku 4.5 scores 25.6 on the Intelligence Score versus 60.5 for Claude Opus 5.5 (Reasoning), the current #1. Input pricing is $1 vs $4 per 1M tokens.

Compare on the AI leaderboard · All AI models

More models from Anthropic