Claude Opus 4
Hybrid reasoning model for coding, advanced reasoning, and AI agents
Claude Opus 4 is a specific Anthropic model release introduced in May 2025 as part of the Claude 4 generation. Anthropic describes it as a hybrid reasoning large language model focused on coding, advanced reasoning, and AI agent workflows; the API model name was claude-opus-4-20250514 and it is now retired on Anthropic-operated platforms.
Pricing
Official pricing table states Claude Opus 4 is retired except on Google Cloud. It also lists 5-minute cache writes at $18.75/MTok and 1-hour cache writes at $30/MTok; MTok means million tokens.
Anthropic's official Claude pricing documentation lists Claude Opus 4 (retired except on Google Cloud) at $15/MTok base input, $1.50/MTok cache hits & refreshes, and $75/MTok output. All prices are stated in USD per million tokens.