Head-to-head · Anthropic vs Anthropic
Claude Haiku 4.5 vs Claude Sonnet 5
Quick answer: Claude Haiku 4.5 stands out for cheapest way to use Claude at scale. Claude Sonnet 5 stands out for lower price than Sonnet 4.6 with newer capabilities. Reviewed September 2026.
Overview
Claude Haiku 4.5: Claude Haiku 4.5 is Anthropic's fast, low-cost model at $1 and $5 per million tokens. It suits high-volume tasks such as classification, extraction and short drafting, where response speed and cost matter more than deep reasoning.
Claude Sonnet 5: Claude Sonnet 5 is the mid-tier model in the Claude 5 family and the default choice for most professional work. Anthropic made its launch pricing of $2 and $10 per million tokens permanent, which makes it one of the best price-to-quality options in the lineup.
At a glance
| Dimension | Claude Haiku 4.5 | Claude Sonnet 5 |
|---|---|---|
| Vendor | Anthropic | Anthropic |
| Starting price | API: $1 in / $5 out per M tokens | API: $2 in / $10 out per M tokens |
| Pricing model | Paid | Paid |
| Free tier | No | No |
| Category | Generative AI | Generative AI |
Strengths and limits
Claude Haiku 4.5
- Cheapest way to use Claude at scale
- Good quality for classification and extraction
- Low latency
Watch out for
- Weaker on long, multi-step reasoning
- Haiku 5.5 is announced as coming soon
- Less reliable on complex tool chains
Claude Sonnet 5
- Lower price than Sonnet 4.6 with newer capabilities
- Fast enough for interactive use
- Handles most tasks that do not need Opus-level depth
Watch out for
- Below Opus on the hardest reasoning tasks
- Sonnet 5.5 is announced as coming soon
- Image generation is not built in
Key features
Claude Haiku 4.5
- Fast responses for interactive and high-volume use
- Lowest price in the current Claude lineup
- Tool use support
- Batch pricing at half the standard rate
Claude Sonnet 5
- Balanced speed and quality for everyday work
- Strong on drafting, analysis and code review
- Computer use and tool use
- Batch pricing at half the standard rate
- Available through Claude apps, the API and major clouds
Pricing compared
Claude Haiku 4.5 is priced by usage rather than by seat: API: $1 in / $5 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Claude Sonnet 5 is priced by usage rather than by seat: API: $2 in / $10 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Profession-fit verdict
8 roles where both tools are recommended. A higher relevance score means a better fit for that job.
| Profession | Claude Haiku 4.5 score | Claude Sonnet 5 score |
|---|---|---|
| Medical Coder | 7/10 | 8/10 |
| Insurance Agent | 7/10 | 8/10 |
| Auditor | 7/10 | 8/10 |
| Tax Preparer | 7/10 | 8/10 |
| Legal Secretary | 7/10 | 8/10 |
| IT Support | 7/10 | 8/10 |
| Recruiter | 7/10 | 8/10 |
| Customer Service Manager | 7/10 | 8/10 |
Frequently asked questions
Which is better, Claude Haiku 4.5 or Claude Sonnet 5?
It depends on the work. Claude Haiku 4.5 stands out for cheapest way to use Claude at scale. Claude Sonnet 5 stands out for lower price than Sonnet 4.6 with newer capabilities. Across 8 professions where both are rated, Claude Sonnet 5 ranks higher more often (8 roles).
How do Claude Haiku 4.5 and Claude Sonnet 5 compare on price?
Claude Haiku 4.5 is priced by usage rather than by seat: API: $1 in / $5 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing. Claude Sonnet 5 is priced by usage rather than by seat: API: $2 in / $10 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Is there a free option between Claude Haiku 4.5 and Claude Sonnet 5?
Neither lists a permanent free tier. Look for trials or usage-based pricing to test on real work first.