Claude 4.5 Sonnet is finally here and is the best coding model around. Bolt, Lovable, and Cursor have already announced they are rolling it out to developers. Claude 4.5 Sonnet is smarter than 4.1 Opus and 4 Sonnet. Even in max reasoning mode, it is cheaper to use for many tasks than Grok 4 and GPT-5 due to its token efficiency.
Anthropic’s new Claude 4.5 Sonnet is now the #4 most intelligent model, beats 4.1 Opus, and places Anthropic in the top 3 in the race for frontier intelligence
Claude 4.5 Sonnet offers a clear upgrade for Claude 4.1 Opus and Claude 4 Sonnet users, with greater intelligence at… pic.twitter.com/m36Up64SXY
— Artificial Analysis (@ArtificialAnlys) September 30, 2025
According to Artificial Analysis, Claude 4.5 Sonnet scores 61 on the Artificial Analysis Intelligence Index, 4 points higher than Claude 4 Sonnet Thinking. It is is only behind GPT-5 and Grok 4 at this point. Claude 4.5 Sonnet is priced the same as Claude 4 Sonnet at $3/$15 per 1M input/output tokens. Claude Code has also gotten an upgrade. Claude Agent SDK gives you access everything that powers it. Claude Code has an updated terminal and a VS code extension. With the checkpoints feature, you can undo the latest changes, which is quite handy.
Context management extends what agents can do:
– Context editing clears stale context when approaching token limits
– The memory tool stores information outside the context windowAgents can now handle longer, more complex tasks.
Read more:https://t.co/WGpHJZ8McY pic.twitter.com/RARW9zXniQ
— Claude (@claudeai) September 29, 2025
The Claude API also has context editing and memory tool, so you will be able to extend what agents can do. Context editing clears stale context when you are approaching limits.
[HT]
