Anthropic Sonnet 5.5 Outperforms Opus 5.5 on Terminal-Bench 4.0 at Half the Cost

Key Info

Anthropic's Sonnet 5.5 beats Opus 5.5 on Terminal-Bench 4.0 at half the cost, using far fewer tokens to achieve the same work, cutting costs by up to 30% per task and generating output 30% faster than its predecessor. It is showcased in the new Cline desktop app alongside free model promos like DeepSeek V4.1 Flash.

Highlights

• Sonnet 5.5 tops Terminal-Bench 4.0 over Opus 5.5 at roughly half the price.
• Uses substantially fewer tokens to accomplish identical tasks, reducing per-task costs by up to 30%.
• Generates outputs 30% faster than prior Sonnet models, now the fastest Sonnet to date.
• Integrated into the latest Cline desktop app, with free-model promotions including DeepSeek V4.1 Flash.