Anthropic, a rival to OpenAI, has emerged as a significant concern for the AI leader due to its rapid growth in key areas like automatic code writing. According to reports, Anthropic's progress has caused rising tensions with OpenAI, particularly as Anthropic secures enterprise customers like Airtable and LexisNexis, with its AI model, Claude, powering 60% of AI features for these clients. OpenAI, with a projected $4 billion in revenue for 2024 and a $157 billion valuation, is facing competition from Anthropic, which is expected to reach $1 billion in annual recurring revenue (ARR) by the end of 2024 with an $18 billion valuation.