Anthropic released Claude Opus 5 on July 24, 2026, and made it available on all paid Claude plans. Coverage of the launch highlighted an “effort” control that lets you decide how much thinking the model puts into an answer, along with API pricing of $5 per million input tokens and $25 per million output tokens. If you are new to Claude or upgrading from older models, this beginner-friendly guide explains what’s new, how the effort setting works and gives you ready-to-use prompts for writing, research and small business tasks.
What’s New in Claude Opus 5
- Stronger reasoning for complex, multi-step tasks such as analysis, planning and coding.
- Effort control: choose lighter, faster responses or deeper, more thorough work.
- Long documents: analyse large PDFs, spreadsheets and reports in one conversation.
- Better tool use: work with files, search and connected apps where your plan allows.
Opus 5 vs Sonnet 5: Which Should You Use?
Anthropic offers several models. Sonnet 5, released in June 2026, is designed to be fast and capable for everyday work. Opus 5 is the most capable option for demanding tasks.
| Task | Suggested model |
|---|---|
| Quick emails and short rewrites | Faster model (e.g., Sonnet) |
| Long reports, research, strategy | Opus 5 |
| Coding projects and debugging | Opus 5 |
| Brainstorming many ideas fast | Faster model |
The Effort Setting Explained
Think of effort like asking a colleague for a “quick take” or a “thorough review”.
- Low effort: fast answers for simple questions and edits.
- Medium effort: a good default for most writing and analysis.
- High effort: best for complex problems, careful research and code where mistakes are expensive.
Higher effort usually takes longer and, on the API, may use more tokens. Start at medium and increase only when the answer is not good enough.
How to Write Great Prompts for Claude Opus 5
Claude responds very well to clear context. Use this structure:
- Background: who you are and the situation.
- Task: exactly what you want.
- Constraints: length, tone, audience, what to avoid.
- Format: headings, table, bullet points, word count.
- Examples: paste a sample of the style you like.
You can also put long reference material inside clear labels, such as “<article> … </article>”, and then ask questions about it.
Prompts for Writing
- “You are an editor for a beginner-friendly tech blog. Rewrite this draft so each section starts with a direct answer, sentences are under 20 words and jargon is explained. Keep my examples.”
- “Create a detailed outline for a 1,500-word article on [topic] for small business owners in India. Include H2s, H3s, a comparison table idea and five FAQs.”
- “Here are three paragraphs I wrote. Describe my writing style in five bullet points, then write the next section in the same style.”
- “Give me ten headline options under 60 characters. Mark which ones are most likely to get clicks without sounding like clickbait.”
Prompts for Research and Analysis
- “Read the attached report and list the five most important findings, each with the page number it came from.”
- “Compare these two supplier quotes in a table: price, delivery time, warranty, risks. Then recommend one and explain why.”
- “Analyse this sales spreadsheet. What are the trends by month and product? What questions should I investigate next?”
- “Play devil’s advocate: what are the strongest arguments against my plan below?”
Prompts for Small Businesses
- “Write a standard operating procedure for handling customer refunds, step by step, for a team of three.”
- “Draft a friendly WhatsApp message announcing our Diwali offer, under 60 words.”
- “Create a 30-day social media plan for a home bakery, with post ideas and captions.”
- “Turn this customer complaint into a calm, helpful reply that offers a solution.”
Prompts for Learning
- “Explain how compound interest works using a simple example with ₹10,000, then quiz me with three questions.”
- “Teach me the basics of Excel pivot tables in five steps, with a practice dataset.”
Free vs Pro Access
Claude has a free plan with limited usage. Opus 5 is available on paid plans such as Pro, Max, Team and Enterprise, with higher limits on higher tiers. Check the Claude pricing page for current details in your country.
API Pricing for Developers
At launch, Opus 5 API pricing was reported at $5 per million input tokens and $25 per million output tokens. Developers can reduce costs with prompt caching, batching and by using lighter models for simple steps.
Frequently Asked Questions
Is Claude Opus 5 free?
It is available on paid plans; the free plan uses other models with limits.
What is the effort dial?
A setting that controls how much reasoning the model applies — lower for speed, higher for depth.
Is Opus 5 good for SEO writing?
It is strong at structured long-form content, but always add your own experience, check facts and edit before publishing.
Can Claude read PDFs and spreadsheets?
Yes, you can upload files and ask questions about them.
Final Thoughts
Claude Opus 5 is a powerful assistant for writing, research and business tasks. Give it clear context, choose the right effort level, and use the prompts above as templates. As with any AI, review its work before you rely on it.
