Claude Opus 3.5
Most advanced version of Claude with enhanced capabilities.
Best for harder Claude tasks, after a faster model has already failed the draft.
Our take
Use the largest Claude tier when the document is long or the reasoning is expensive to get wrong, and use a faster tier for everything else. The name on this page may not match Anthropic’s current flagship. Pay for the capability, not for the version string.
What to use it for
Harder analysis
The case for this tier is a task the faster model muddled, not everyday email.
Long context
Still confirm the current limit if the document is a book, a repo, or a contract set.
Cost
A top-tier plan only pays off if those harder tasks are a weekly habit.
Check before you pay
- Confirm the live model name and the plan that includes it. Opus 3.5 is a directory label, not a promise.
- The price shown here can be stale. Read Anthropic’s pricing page.
How to decide
Run Claude Opus 3.5 on a few of your own tasks and compare the result with one alternative before you pay. Check how your data is handled, estimate a realistic month, and keep a person responsible for the output. The 5-question framework is the longer version of that test, and the safe-use checklist covers privacy and accuracy.
Similar tools
Claude Sonnet 3.5
Anthropic's fast, capable everyday AI assistant for writing, analysis and coding
Free tier available