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Claude Sonnet 5 Is Now the Default for All Claude Users

Anthropic's Claude Sonnet 5 is now the default model for Free and Pro users, offering near-Opus performance at a steep discount.

AI Tutorials · 1 July 2026 · Updated 1 July 2026 · 3 min read

Quick answer

Anthropic launched Claude Sonnet 5 on June 30, 2026, and it is now the default model for every Free and Pro Claude user. It performs close to the flagship Opus 4.8 on coding, reasoning, and tool use, but costs 33-50% less via API. Introductory pricing runs at $2 per million input tokens through August 31.

product-launch

Claude Sonnet 5 Is Now the Default for All Claude Users

Anthropic has released Claude Sonnet 5, and as of today it is the default model for every Free and Pro user on claude.ai. The new model is the most capable Sonnet yet, closing the gap with Anthropic’s flagship Opus 4.8 while costing significantly less to run.

What Changed

Sonnet 5 is a substantial upgrade over its predecessor, Sonnet 4.6. According to Anthropic’s announcement, the model delivers major improvements in reasoning, tool use, coding, and knowledge work. It can make plans, use tools like browsers and terminals, and run autonomously at a level that previously required the larger and more expensive Opus models.

Anthropic also notes that Sonnet 5 shows a lower rate of undesirable behaviors than Sonnet 4.6, making it generally safer to use in agentic workflows where the model operates with less human oversight.

Pricing

For API users, Sonnet 5 launches with introductory pricing of $2 per million input tokens and $10 per million output tokens — available through August 31, 2026. After that, standard pricing moves to $3 input and $15 output. That is still well below Opus 4.8’s rates, making Sonnet 5 an attractive option for developers building AI agents and coding tools.

Free and Pro Claude users do not need to do anything. Sonnet 5 is already the default model in their conversations.

Why This Matters

The AI model market is increasingly competitive at the mid-tier. OpenAI’s GPT-5.4 Mini, Google’s Gemini 3.5 Flash, and now Sonnet 5 are all fighting for the sweet spot between performance and cost. For most everyday tasks — writing, analysis, coding assistance — these models are now close enough to their flagship counterparts that the price difference is hard to justify.

If you use Claude regularly, you are already on Sonnet 5. If you are building with the API, the introductory pricing makes it worth testing against whatever model you currently use. Check out our complete guide to Claude to get the most out of the new model, or learn how to use it for coding with Claude Code.

What This Means for You

If you are a casual Claude user, your experience just got noticeably better at no extra cost. If you are a developer, the combination of near-Opus performance and steep introductory pricing makes Sonnet 5 one of the best value propositions in the current AI landscape.

Frequently asked questions

What is Claude Sonnet 5?

Claude Sonnet 5 is Anthropic's newest mid-tier AI model. It is designed for agentic tasks like coding, research, and multi-step tool use, and performs close to the more expensive Opus 4.8 flagship model.

How much does Claude Sonnet 5 cost?

Introductory API pricing is $2 per million input tokens and $10 per million output tokens through August 31, 2026. After that, standard pricing is $3 input and $15 output. Free and Pro Claude users get access through their existing plans.

Is Claude Sonnet 5 better than Sonnet 4.6?

Yes. Anthropic says Sonnet 5 is a substantial improvement over Sonnet 4.6 on reasoning, tool use, coding, and knowledge work. It also has a lower rate of undesirable behaviors, making it safer for agentic use.

Can I still use other Claude models?

Yes. Max, Team, and Enterprise users can switch between models including Opus 4.8. Sonnet 5 is simply the new default for Free and Pro tiers.