default is opus and auto switches to sonnet when you run out of "opus quota", which usually is pretty bad. Answer from InvestigatorKey7553 on reddit.com
🌐
DataCamp
datacamp.com › tutorial › claude-opus-4-claude-code
Claude Opus 4 with Claude Code: A Guide With Demo Project | DataCamp
May 23, 2025 - Copy the authentication code generated ... paste it into the Claude Code terminal. Once authenticated, Claude Code will be ready to use. For a more comprehensive walkthrough of Claude Code’s features and practical usage, check out our Claude Code guide with examples.
🌐
Claude
support.claude.com › en › articles › 11940350-claude-code-model-configuration
Claude Code Model Configuration | Claude Help Center
Enter the following commands (depending on the model you’d like to use for that session): For Opus 4.5: claude --model claude-opus-4-5-20251101 · For Haiku 4.5: claude --model claude-haiku-4-5-20251001 · For Sonnet 4.5: claude --model ...
🌐
The New Stack
thenewstack.io › home › claude opus 4 with claude code: a developer walkthrough
Claude Opus 4 With Claude Code: A Developer Walkthrough - The New Stack
May 31, 2025 - I know he likes detail, but I was slightly worried about the 200-line prompt file he was maintaining. (I later understood that Claude writes a lot of notes into its own file.) I was looking to use Claude Opus 4 with Claude Code (which I tried out last month) and had a specific idea of what I wanted to apply its agentic abilities to.
🌐
Apidog
apidog.com › blog › opus-4-5-claude-integration
How to use Claude 4.5 Opus with Cursor and Claude Code
1 month ago - By using Claude Opus 4.5, both Cursor and Claude Code can benefit from its deeper reasoning and memory — but which tool you choose depends on your workflow preferences. Switch models thoughtfully — Because Opus is powerful but more expensive, switch only when you need its reasoning strengths. Use planning mode in Claude Code — Have the agent plan out multi-step tasks before executing.
🌐
Anthropic
anthropic.com › claude › opus
Claude Opus 4.5
Claude Opus 4.5 delivers frontier reasoning within Lovable's chat mode, where users plan and iterate on projects. Its reasoning depth transforms planning—and great planning makes code generation even better.
Find elsewhere
🌐
Claude
support.claude.com › en › articles › 11145838-using-claude-code-with-your-pro-or-max-plan
Using Claude Code with your Pro or Max plan | Claude Help Center
Model access: Max plan subscribers can use Sonnet or Opus 4.5 on Claude Code (switch between them using the /model command). Best for: Everyday use with larger codebases, or power users.
🌐
DEV Community
dev.to › therealmrmumba › how-to-use-claude-4-opus-sonnet-with-cursor-windsurf-11np
How to Use Claude 4 Opus & Sonnet with Cursor & Windsurf - DEV Community
May 23, 2025 - If you’re writing production code, you don’t want to bounce between browser tabs or paste snippets into a chatbot. That’s where Cursor and Windsurf come in—two purpose-built tools that let you work with Claude inside your development flow, not around it. This guide shows you how to combine Claude 4 (Opus and Sonnet) with Cursor and Windsurf, including setup steps, prompt patterns, and smart usage tips for faster, cleaner code.
🌐
CometAPI
cometapi.com › how-to-use-claude-opus-4-5-via-cursor-and-claude-code
How to use Claude Opus 4.5 with Cursor and Claude Code — a in-depth guide - CometAPI - All AI Models in One API
2 weeks ago - Anthropic’s Claude Opus 4.5 is the company’s newest flagship model focused on coding, agentic workflows, and advanced “computer use.” This article explains what Opus 4.5 is, how it performs on public benchmarks, and — step by step — how to use it inside two developer-focused surfaces: Cursor (an AI-powered IDE) and Claude Code (Anthropic’s command-line agentic coding tool).
🌐
Claude
code.claude.com › docs › en › model-config
Model configuration - Claude Code Docs
In plan mode - Uses opus for complex reasoning and architecture decisions · In execution mode - Automatically switches to sonnet for code generation and implementation This gives you the best of both worlds: Opus’s superior reasoning for planning, and Sonnet’s efficiency for execution.
🌐
Vps-commander
vps-commander.com › blog › claude-opus-4-5-setup-2025
How to Set Up Claude Opus 4.5 & Claude Code - Step-by-Step Guide 2025
Watch the Thinking Blocks: Opus 4.5 will preserve its reasoning context. You can see it planning, checking files, and self-correcting. Approve Changes: Claude will present a diff. Press Enter to apply or R to reject/refine. Opus 4.5 has enhanced "Computer Use" capabilities. It can now inspect ...
🌐
Eesel AI
eesel.ai › blog › claude-code-opus
Claude Code Opus: A developer's guide to features, costs, and limits - eesel AI
Claude Code Opus pairs Anthropic’s Opus 4.1 model with a CLI for deep codebase work. Explore features, use cases, costs, and business-ready alternatives like eesel AI.
🌐
Anthropic
anthropic.com › news › claude-opus-4-5
Introducing Claude Opus 4.5
Claude Opus 4.5 delivers frontier reasoning within Lovable's chat mode, where users plan and iterate on projects. Its reasoning depth transforms planning—and great planning makes code generation even better.
🌐
Anthropic
anthropic.com › news › claude-opus-4-1
Claude Opus 4.1
Windsurf reports Opus 4.1 delivers ... Sonnet 4. We recommend upgrading from Opus 4 to Opus 4.1 for all uses. If you’re a developer, simply use claude-opus-4-1-20250805 ......
🌐
Reddit
reddit.com › r/claudeai › claude opus 4.5 is now available in claude code for pro users
r/ClaudeAI on Reddit: Claude Opus 4.5 is now available in Claude Code for Pro users
3 weeks ago -

Claude Opus 4.5, our frontier coding model, is now available in Claude Code for Pro users. Pro users can select Opus 4.5 using the /model command in their terminal.

Opus 4.5 will consume rate limits faster than Sonnet 4.5. We recommend using Opus for your most complex tasks and using Sonnet for simpler tasks.

To get started:

* Run claude update
* /model opus

🌐
GitHub
github.com › anthropics › claude-code › issues › 5830
[BUG] Claude Pro users are not currently able to use Opus in Claude Code · Issue #5830 · anthropics/claude-code
August 15, 2025 - Claude Pro users should be able to access Opus 4.1 as stated on the official Anthropic website at https://www.anthropic.com/claude/opus which explicitly lists "available on Claude for Pro, Max, Team, and Enterprise users" and mentions availability ...
Published   Aug 15, 2025