Head-to-head · Anthropic vs Anthropic
Claude Haiku 4.5 vs Claude Opus 5.5
Quick answer: Claude Haiku 4.5 stands out for cheapest way to use Claude at scale. Claude Opus 5.5 stands out for matches Claude Fable 5.1 on most work at a much lower price. 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 Opus 5.5: Claude Opus 5.5, released on 22 September 2026, is Anthropic's newest Opus model. Anthropic reports it performs at the level of Claude Fable 5.1 on most work while costing about 40% less to run than Opus 5, with a focus on agentic coding, computer use and knowledge work.
At a glance
| Dimension | Claude Haiku 4.5 | Claude Opus 5.5 |
|---|---|---|
| Vendor | Anthropic | Anthropic |
| Starting price | API: $1 in / $5 out per M tokens | API: $4 in / $20 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 Opus 5.5
- Matches Claude Fable 5.1 on most work at a much lower price
- Faster output than Opus 5
- Strong on coding and knowledge work such as financial analysis
Watch out for
- Newest release, so fewer independent long-term evaluations
- Output still costs $20 per million tokens
- Sonnet or Haiku are cheaper for routine tasks
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 Opus 5.5
- 1M-token context window at standard pricing
- Agentic coding, code review and bug detection
- Computer use and complex multi-step tasks
- Clearer, more direct communication style
- Available in Claude apps, the API, Claude Code, AWS, Google Cloud and Microsoft Azure
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 Opus 5.5 is priced by usage rather than by seat: API: $4 in / $20 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 Opus 5.5 score |
|---|---|---|
| Medical Coder | 7/10 | 9/10 |
| Insurance Agent | 7/10 | 9/10 |
| Auditor | 7/10 | 9/10 |
| Tax Preparer | 7/10 | 9/10 |
| Legal Secretary | 7/10 | 9/10 |
| IT Support | 7/10 | 9/10 |
| Recruiter | 7/10 | 9/10 |
| Customer Service Manager | 7/10 | 9/10 |
Frequently asked questions
Which is better, Claude Haiku 4.5 or Claude Opus 5.5?
It depends on the work. Claude Haiku 4.5 stands out for cheapest way to use Claude at scale. Claude Opus 5.5 stands out for matches Claude Fable 5.1 on most work at a much lower price. Across 8 professions where both are rated, Claude Opus 5.5 ranks higher more often (8 roles).
How do Claude Haiku 4.5 and Claude Opus 5.5 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 Opus 5.5 is priced by usage rather than by seat: API: $4 in / $20 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 Opus 5.5?
Neither lists a permanent free tier. Look for trials or usage-based pricing to test on real work first.