Anthropic Launches Claude Sonnet 5 With Stronger Agentic Coding And Temporary Low Pricing

And Claude Sonnet 5 just launched.

Closes the gap with Opus 4.8, and is cheap until August.

This makes agentic AI much cheaper, with $2 input tokens and $10 output tokens per 1M through Aug-26. Price rises after 08-26 to $3 input and $15 output per 1M.

They call Sonnet 5 its “most agentic Sonnet model yet,”

Its coding score hit 63.2% on SWE-bench Pro, versus 58.1% for Sonnet 4.6.

Sonnet 5 gets 63.2% in agentic coding, while Opus 4.8 reaches 69.2% and Sonnet 4.6 hits 58.1%.

But in knowledge work, Sonnet 5 slightly beats Opus 4.8, even though Opus is known for tough judgment and deep research tasks.