Claude Haiku 4.5

// Overview

Claude Haiku 4.5 is Anthropic's fastest and most cost-efficient model, delivering near-frontier intelligence for real-time and high-volume applications. Released October 15, 2025, it matches Claude Sonnet 4's performance on coding, computer use, and agent tasks at a fraction of the cost.

It is the first Haiku model to include extended thinking, computer use, and context awareness, with controllable reasoning depth and a 128K thinking budget. It supports a 200K-token context window, up to 64K output tokens, and accepts both text and image input.

Pricing is $1 per million input tokens and $5 per million output tokens, with cache reads at $0.10 per million. Its speed and price make it well suited to sub-agents, parallelized execution, and scaled deployment.

// Benchmarks

1. SWE-bench Verified73.3%
2. Terminal-Bench41.75%

Scores on a 0–100 scale (25-point gridlines); higher is better. Each benchmark links to its published source.

// Pricing

Pricing source ↗

// Strengths

• Fastest Claude model with the lowest per-token price ($1/$5)
• Coding performance matching Claude Sonnet 4 at about one-third the cost
• Strong agentic coding (73.3% on SWE-bench Verified)
• First Haiku model with extended thinking and computer use
• Ideal for high-throughput sub-agents and parallelized execution

// Best for

• Reach for it when you need low-latency, high-volume inference such as real-time chat or large fan-out agent fleets.
• Reach for it as a cost-efficient sub-agent or worker model inside a larger Opus/Sonnet-orchestrated system.
• Reach for it for coding and computer-use tasks where speed and cost matter more than absolute frontier capability.

// How to access

// Claude Haiku — every version

The full lineage of the Claude Haiku line, newest first. Every version has its own page — click any to compare specs, benchmarks and pricing.