Anthropic Launches Claude Sonnet 5.5, 30% Faster and Cheaper

Anthropic has released Claude Sonnet 5.5 on September 28.
The company says it runs more than 30 percent faster and costs about 30 percent less per task, thanks to fewer tokens used. Pricing stays at $2 per million input tokens and $10 per million output tokens.
It scored 70.6 percent on Terminal-Bench, up from 10.3 percent for its predecessor. The model even beat the classic game Pokémon Red from screenshots alone.
Opus 5.5 remains the stronger choice for complex work. Developers get the model through the Anthropic API and partner platforms.
The company says the speed gains help real-time coding assistants. Early testers praised its reliability on long tasks.
Anthropic plans further efficiency updates this year.
Anthropic said Sonnet 5.5 uses fewer tokens per task, which drives the cost saving. The model is available through the company’s API and cloud partners. Developers said the speed boost is noticeable in coding assistants. Anthropic said safety evaluations were completed before launch.
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