AI article
Sonnet 5.5 Just Ate Opus. Anthropic Did It on Purpose.
Community description: Sonnet 5.5 scores 70.6% on Terminal-Bench — beating Opus 5.5's 66.4% — at half the price. Here's why Anthropic is cannibalizing its own premium tier.
Dev.to | Sep 30, 2026 | Max Quimby
Automated excerpt
Second, Sonnet 5. 5 and Opus 5. 5 are separated by single-digit margins on nearly every benchmark. At medium effort, Sonnet 5. 5 is dramatically cheaper. Both Sonnet 5. 5 and Opus 5. 5 charge $0. 20 per million cached tokens -- identical.
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