LaunchAI ModelsJune 30, 2026
Introducing Claude Sonnet 5, Anthropic's most agentic Sonnet yet

Claude Sonnet 5 features a native 1M-token context window with promotional pricing of $2/$10 per Mtok through August 31. It ranks second only to Fable 5 on the AA-Briefcase agentic benchmark and is now available on AWS Bedrock, Perplexity, and Databricks.
15 sources
Introducing Claude Sonnet 5 on AWS: Anthropic’s most capable Sonnet modelaws.amazon.com
Working at the frontier: How Cognition trusts Claude Fable 5 to work through the nightclaude.com
2.1.201code.claude.com
v2.1.201github.com
Claude Fable 5 and Claude Mythos 5anthropic.com
RT @claudeai: Introducing Claude Sonnet 5, our most agentic Sonnet yet. It makes plans, uses tools...x.com
[AINews] Sonnet 5 today, and Fable 5 tomorrowlatent.space
Claude Fable 5 and Mythos 5: The System Cardthezvi.substack.com
What's new in Claude Sonnet 5simonwillison.net