AI model comparison

Claude Sonnet 5 vs Claude Haiku 4.5

Side by side comparison of Claude Sonnet 5 and Claude Haiku 4.5 on pricing, benchmark scores, context window, and more.

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work.

Input / 1M: $2
Output / 1M: $10
Context: 1M

Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models.

Input / 1M: $1
Output / 1M: $5
Context: 200K

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At a glance

Quick verdict

How the two models stack up on the things people ask about most.

Lower price

Claude Haiku 4.5

2x cheaper for a typical chat

Higher intelligence score

Not available

Not enough benchmark data

Larger context window

Claude Sonnet 5

1M vs 200K tokens

Newer release

Claude Sonnet 5

Released June 30, 2026

Benchmarks

Benchmark scores

Independent scores from Artificial Analysis. Higher is better.

Intelligence index

Claude Sonnet 5Not available

Claude Haiku 4.5Not available

Coding index

Claude Sonnet 571.5

Claude Haiku 4.543.9

Agentic index

Claude Sonnet 543.6

Claude Haiku 4.58

Pricing

Claude Sonnet 5 vs Claude Haiku 4.5 API pricing

Per-token API rates. Cheaper option highlighted.

Metric	Claude Sonnet 5	Claude Haiku 4.5
Input tokensPer 1M tokens	$2	$1
Output tokensPer 1M tokens	$10	$5
Cached input (read)Per 1M tokens	$0.20	$0.10
Cache writePer 1M tokens	$2.50	$1.25
Web searchPer request	$0.01	$0.01

What it costs in practice

Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.

Chat message

2K in, 500 out

Claude Sonnet 5$9

Claude Haiku 4.5$4.50

Coding task

30K in, 4K out

Claude Sonnet 5$100$46 cached

Claude Haiku 4.5$50$23 cached

Long document summary

150K in, 2K out

Claude Sonnet 5$320$50 cached

Claude Haiku 4.5$160$25 cached

Specs

Context window and capabilities

How much each model can read, how much it can write, and what it accepts as input.

Metric	Claude Sonnet 5	Claude Haiku 4.5
Context window	1M tokens	200K tokens
Max output	128K tokens	64K tokens
Input types	File, Image, Text	File, Image, Text
Output types	Text	Text
Reasoning effort levels	Max, Extra high, High, Medium, Low, None	Not available
Default reasoning effort	High	Not available
Release date	June 30, 2026	October 15, 2025

Features

Supported features

API features available for each model.

Metric	Claude Sonnet 5	Claude Haiku 4.5
Tool calling	Supported	Supported
Structured outputs	Supported	Supported
JSON mode	Supported	Supported
Reasoning	Supported	Supported
Temperature	Not supported	Supported
Stop sequences	Supported	Supported
Deterministic seed	Not supported	Not supported
Verbosity control	Supported	Not supported

Our take

Claude Haiku 4.5 is 2x cheaper for a typical chat. Claude Sonnet 5 has the larger context window (1M vs 200K tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.

FAQ

Frequently asked questions

Is Claude Sonnet 5 or Claude Haiku 4.5 cheaper?

Claude Haiku 4.5 is cheaper for a typical chat (2K input tokens and 500 output tokens). Claude Haiku 4.5 costs $1 per 1M input tokens and $5 per 1M output tokens, while Claude Sonnet 5 costs $2 per 1M input tokens and $10 per 1M output tokens.

Which has a bigger context window, Claude Sonnet 5 or Claude Haiku 4.5?

Claude Sonnet 5 supports up to 1M tokens of context, compared with 200K for Claude Haiku 4.5.

Can I use Claude Sonnet 5 and Claude Haiku 4.5 at the same time?

Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Claude Sonnet 5 and Claude Haiku 4.5 answer side by side and keep the better response.

Why choose? Ask both.

Send one prompt to Claude Sonnet 5 and Claude Haiku 4.5 at the same time. Compare the answers side by side and keep the best one.

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