Anthropic's Sonnet 5 model has a pricing structure that includes a promotional rate expiring on August 31, 2026. After this date, prices will increase by 50%, from $2/$10 per million tokens to $3/$15 per million tokens for input and output, respectively. Additionally, Sonnet 5 utilizes an updated tokenizer that can inflate token counts by 1.0x to 1.35x depending on the content type, potentially increasing costs further for users working with code, structured data, or non-English text. AI
IMPACT Users should be aware of potential cost increases for Sonnet 5 due to a scheduled price hike and an updated tokenizer that inflates token counts.
RANK_REASON Article details pricing and tokenizer changes for an existing model release, not a new frontier model.
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