Anthropic launches Claude Opus 5 to rival OpenAI's GPT-5.6
Anthropic has launched Claude Opus 5, an AI model for coding, research and agent tasks that rivals OpenAI's GPT-5.6. It sits below Fable 5 but claims to approach its performance at half the API cost, priced at $5 per million input and $25 per million output tokens. Opus 5 adds adjustable effort levels and a one-million-token context window across Claude's paid plans.