Anthropic's extravagant tokenizer complicates AI pricing

Claude looks substantially more token-hungry than OpenAI's GPT-5.x, thanks to the new tokenizer that Anthropic shipped with ...
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Anthropic releases Claude Sonnet 5, narrowing the gap with its flagship model

Introductory pricing runs through Aug. 31; a new tokenizer changes how usage is counted. Anthropic has released Claude ...
MIT Technology Review

GPT-4o’s Chinese token-training data is polluted by spam and porn websites

The problem, which is likely due to inadequate data cleaning, could lead to hallucinations, poor performance, and misuse. Soon after OpenAI released GPT-4o on Monday, May 13, some Chinese speakers ...
Memeburn

Claude Sonnet 5 Launched With Near-Opus Performance at Half the Price

Anthropic launched Claude Sonnet 5 on June 30, 2026, with introductory API pricing at $2/$10 per million tokens and agentic ...