Yesterday, Anthropic quietly flipped a switch that changes the daily experience for every Claude user — free, Pro, and paid alike.
Anthropic released Claude Sonnet 5, a more powerful and agentic version of the lab's midsize model.
That alone would be news. But here's the part that actually matters to you:
starting Tuesday, Claude Sonnet 5 is the default model for free and Pro plans and is available for every subscription.
You don't have to upgrade. You don't have to find a settings toggle. It's just there.
So what does "more agentic" actually mean in practice? It means Claude can now do things in one shot that used to require babysitting.
Anthropic says it "can make plans, use tools like browsers and terminals, and run autonomously at a level that, just a few months ago, required larger and more expensive models."
One real-world example:
testers handed Sonnet 5 a two-part job — update Salesforce account tiers, then send a launch announcement to enterprise contacts — and it finished end to end.
That kind of multi-step, cross-tool workflow used to stall. Now it completes.
On the benchmark side, the numbers are genuinely interesting.
Sonnet 5 scores 63.2% on agentic coding, compared to Opus 4.8's 69.2% and Sonnet 4.6's 58.1%.
Close to the flagship. And
it edges past Opus 4.8 on knowledge work.
That's not a small thing — it means for research, writing, and analysis tasks, the free-tier model is now arguably *better* than what used to sit above it.
For developers wondering about cost:
Sonnet 5 is priced at $2 per million input tokens and $10 per million output tokens through August 31, after which the price will jump to $3 per million input tokens and $15 per million output tokens.
Get in now.
This launch is part of a very busy week for Anthropic. The same day Sonnet 5 dropped,
Anthropic also announced Claude Science, expanding its AI offerings into the science space — designed to speed up scientific research by making it easier for researchers to access the information they need.
It isn't a new model but rather what Anthropic calls a "workbench" that researchers can use to bring in data from disparate sources and work on it in one place.
The honest take: Sonnet 5 becoming the universal default is the kind of move that quietly raises the floor for everyone. Free users woke up Tuesday with a meaningfully better AI than they had Monday — no announcement email, no paywall nudge. That's worth noticing. If you've been sleeping on Claude because you assumed the free tier was watered-down, that assumption is now out of date.
Whether you're automating workflows, doing research, or just trying to get more done, this is a good week to open [claudecraft.ca](https://claudecraft.ca) and see what you can build.
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**Sources:**
- https://techcrunch.com/2026/06/30/anthropic-launches-claude-sonnet-5-as-a-cheaper-way-to-run-agents/
- https://finance.yahoo.com/technology/article/anthropic-launches-claude-science-in-bid-to-expand-revenue-streams-ahead-of-ipo-170000823.html
- https://releasebot.io/updates/anthropic/claude-code
- https://claudefa.st/blog/models
- https://platform.claude.com/docs/en/about-claude/models/overview