How much does the Claude Haiku 4.5 API cost?

Claude Haiku 4.5 costs $1 per million input tokens and $5 per million output tokens, with cached input at $0.1 per million. A workload of 10M input and 1.5M output tokens per month costs about $17.50.

What is the context window of Claude Haiku 4.5?

Claude Haiku 4.5 supports a context window of 200,000 tokens (200K), with up to 64K output tokens per response.

Is Claude Haiku 4.5 open source?

No — Claude Haiku 4.5 is a proprietary model available through Anthropic's API and partner platforms.

What are the best alternatives to Claude Haiku 4.5?

The closest alternatives by overall capability are Qwen3-Max, GPT-5.5, Gemini 3 Pro, Gemini 2.5 Pro. See the comparison pages for detailed head-to-head breakdowns.

Claude Haiku 4.5

Name: Claude Haiku 4.5
Price: 1 USD
Author: Anthropic

Anthropic·Oct 2025reasoningproprietary

Claude Haiku 4.5 delivers what was frontier coding performance five months prior at a third of the cost — it scores 73.3% on SWE-bench Verified, ahead of many flagship models from early 2025. It is the standard pick for sub-agents in multi-agent systems, high-volume chat, and latency-sensitive products built on the Claude stack. It was also the first Haiku with extended thinking.

Benchmark results

Where it shines

Near-frontier coding at budget pricing
Low latency — ideal for sub-agents and parallel task fan-out
Extended thinking support in the fast tier

Alternatives to Claude Haiku 4.5

Qwen3-Max

Alibaba's trillion-parameter API flagship — frontier-adjacent quality with strong agentic tool use at mid-tier prices.

GPT-5.5

OpenAI's flagship reasoning model with a 1M-token context window, built for hard coding, science and long-horizon agentic work.

Gemini 3 Pro

Google's November 2025 frontier breakout — 91.9% GPQA Diamond and 37.5% HLE made it the reasoning leader of its generation.

Gemini 2.5 Pro

Google's 2025 workhorse flagship — first mainstream thinking model with a 1M context, still widely deployed.

Frequently asked questions

How much does the Claude Haiku 4.5 API cost?: Claude Haiku 4.5 costs $1 per million input tokens and $5 per million output tokens, with cached input at $0.1 per million. A workload of 10M input and 1.5M output tokens per month costs about $17.50.
What is the context window of Claude Haiku 4.5?: Claude Haiku 4.5 supports a context window of 200,000 tokens (200K), with up to 64K output tokens per response.
Is Claude Haiku 4.5 open source?: No — Claude Haiku 4.5 is a proprietary model available through Anthropic's API and partner platforms.
What are the best alternatives to Claude Haiku 4.5?: The closest alternatives by overall capability are Qwen3-Max, GPT-5.5, Gemini 3 Pro, Gemini 2.5 Pro. See the comparison pages for detailed head-to-head breakdowns.