Claude Opus vs Sonnet: What Is the Difference?
Opus is the more capable of the two, suited to harder reasoning, complex code and in-depth analysis; it is slower and usually has a higher credit price per use. Sonnet balances speed and capability and is the better fit for everyday writing, coding and document work. When in doubt, start with Sonnet and switch to Opus if it gets stuck.
Models you can use on CherryChat
| Model | Price | Plan | Context |
|---|---|---|---|
| Claude Opus 5.5 | Input 2 · Output 10 credits/1K tokens | 200k | |
| Claude Sonnet 4.6 Think | Input 0.6 · Output 3 credits/1K tokens | Unlimited with subscription | 200k |
| Claude Sonnet 5 | Input 0.8 · Output 4 credits/1K tokens | 200k | |
| Claude Sonnet 5.5 | Input 0.8 · Output 4 credits/1K tokens | 200k |
Which one for what
- Hard reasoning, proofs and complex analysis: Opus is the stronger of the two and is usually more patient and less error-prone on hard problems.
- Large code changes and architecture decisions: When a change touches many parts and needs a big-picture view, Opus keeps track of the whole better.
- Everyday writing, editing and reports: Sonnet writes naturally and quickly, which is plenty for everyday writing.
- Everyday coding and bug fixes: Sonnet handles most coding questions and answers faster.
- Organizing material and summarizing long documents: Sonnet reads quickly and summarizes clearly, which helps when there are many documents.
- Simple questions where speed matters most: Either can answer, but the lighter Haiku is faster still.
How Opus, Sonnet and Haiku differ
Claude comes in several tiers, and CherryChat offers Opus, Sonnet and Haiku. Of these three, Opus is the most capable, positioned by Anthropic as a daily driver for agentic coding and enterprise work; Sonnet balances speed and capability and covers most work; Haiku is the lightest and fastest, good for everyday questions, summaries and translation. Each tier gets its own new generations, and newer ones are usually stronger within the same tier.
Thinking and speed
Newer Claude models can think before answering complex questions, which makes answers more reliable but slower. On CherryChat, some Claude models let you adjust the thinking effort and some let you switch thinking off; the model details on the Models page show which. When speed matters, Sonnet and Haiku are the better fit.
Choosing on CherryChat
One CherryChat account gives you Opus, Sonnet and Haiku. Start with Sonnet, and if it struggles, switch to Opus and ask the same question again. Some Claude models are included in the Unlimited plan for featured models and the rest use credits; the table below shows the current status.
FAQ
Is Claude Opus better than Sonnet?
Opus is more capable and suits the hardest tasks; Sonnet is faster and enough for most everyday work. Stronger is not always better; it depends on how hard the task is.
Should I use Opus or Sonnet for coding?
Use Sonnet for everyday coding questions, and switch to Opus for large changes that need a big-picture view or bugs that keep coming back.
What is Claude Haiku good for?
Haiku is the lightest and fastest tier, good for everyday questions, summaries, translation and organizing information.
One account covers both, so you can ask the same question to each and compare.
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