# Anthropic upgrades Claude with new Sonnet 5 model, details here > Source: > Published: 2026-06-30 17:57:51+00:00 Anthropic is upgrading Claude Sonnet, replacing Sonnet 4.6 from February with Sonnet 5 as the best medium-sized model. ## Claude Sonnet 5 has arrived as ‘most agentic Sonnet model yet’ In Anthropic’s universe, Sonnet is Claude’s medium-sized AI model that sits between the smaller Haiku model and the larger Opus model. “Claude Sonnet 5 is built to be the most agentic Sonnet model yet. 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,” the company says. “Sonnet 5 narrows the gap: its performance is close to that of Opus 4.8, but at lower prices. It’s a substantial improvement over its predecessor, Sonnet 4.6, on important aspects of agentic performance like reasoning, tool use, coding, and knowledge work.” ## Sonnet 5 is the new default model for Claude free and pro users Anthropic says that today’s Sonnet 5 release is the default for both Free and Pro Claude users. The company also has special introductory pricing that runs through August 31. “Claude Sonnet 5 is available everywhere today at an introductory price of $2 per million input tokens and $10 per million output tokens through August 31, 2026,” the company says. “It then moves to standard pricing at $3 per million input tokens and $15 per million output tokens. We’ve increased rate limits across Chat, Cowork, Claude Code, and the Claude Platform to accommodate the higher token usage of higher effort levels; users can select whichever level makes sense for their particular project,” Anthropic adds. Anthropic also has its most capable Mythos 5 and Fable 5 models. Mythos 5 has fewer guardrails for select security researchers and platform owners. Fable 5 is the safer version that was briefly available for customers before being blocked by the U.S. government. Anthropic says it’s working on restoring access in the future. Claude Opus 4.8 [arrived](https://9to5mac.com/2026/05/28/anthropic-upgrades-claude-with-new-opus-4-8-model-heres-whats-new/) at the end of May. Claude [Fable 5 followed](https://9to5mac.com/2026/06/09/anthropic-just-released-public-mythos-class-ai-model-called-claude-fable-details-here/) a few days later [before being pulled](https://9to5mac.com/2026/06/12/anthropic-pulls-claude-mythos-5-and-claude-fable-5-following-us-government-directive/). Mythos 5 has [partially been restored](https://9to5mac.com/2026/06/26/anthropic-cleared-to-release-claude-mythos-5-to-over-100-us-institutions/) to select customers. Claude Sonnet 5 arrives four months after the previous [Sonnet 4.6](https://9to5mac.com/2026/02/17/claude-sonnet-4-6-model-brings-much-improved-coding-skills-and-upgraded-free-tier/) release. You can learn more about Claude Sonnet 5 [here](https://www.anthropic.com/news/claude-sonnet-5). **Related Anthropic stories:** [Anthropic launches Claude Tag enterprise collaborative tool for agentic workflows](https://9to5mac.com/2026/06/23/anthropic-launches-claude-tag-enterprise-collaborative-tool-for-agentic-workflows/)[Anthropic’s latest Claude release turns your Mac into a small business powerhouse](https://9to5mac.com/2026/05/13/anthropics-latest-claude-release-turns-your-mac-into-a-small-business-powerhouse/)[Claude just gained Spotify music and podcast integration, here’s what it can do](https://9to5mac.com/2026/04/23/claude-just-gained-spotify-music-and-podcast-integration-heres-what-it-can-do/) *Do more with your Apple products* [Apple AirTag 2 | Add Find My tracking to keys, bags, bikes, more](https://amzn.to/4vjNWN1) [AirPods 4 | Apple’s newest wireless headphones](https://amzn.to/43ndewV) [AirPods Pro 3 | Apple’s best wireless headphones](https://amzn.to/4ut3FYp) [Beats USB-A to USB-C Cable | The official CarPlay cable](https://amzn.to/4mpKs7K) *FTC: We use income earning auto affiliate links.* [More.](https://9to5mac.com/about/#affiliate) [our homepage](http://9to5mac.com/)for all the latest news, and follow 9to5Mac on [exclusive stories](https://9to5mac.com/feature/exclusive/), [reviews](https://9to5mac.com/guides/review/), [how-tos](https://9to5mac.com/guides/how-to/), and [subscribe to our YouTube channel](https://www.youtube.com/9to5mac)