Anthropic released Claude Opus 5 on July 17, 2025, positioning it as the most capable model in the Claude lineup and a direct competitor to OpenAI's o3 and Google's Gemini 2.5 Pro. The model ships with a 200K token context window. Anthropic charges $15 per million input tokens and $75 per million output tokens, making it 5x Sonnet 4's input rate ($3/$15 per million tokens input/output) and 7.5x GPT-4.1's input rate ($2/$8). Haiku sits far below at $0.25/$1.25. Gemini 2.5 Pro is priced at $1.25/$10 per 1M tokens for prompts up to 200K tokens, and $2.50/$15 per 1M tokens for prompts above 200K tokens. The analysis targets intermediate developers weighing real performance gains against real costs. The marketing narrative claims better reasoning, stronger coding, and more reliable agentic workflows, but benchmark data from Anthropic and independent evaluations tells a more nuanced story. The goal is to determine where Opus 5 genuinely pulls ahead, where improvements are marginal, and when routing to a cheaper model delivers nearly identical results at a fraction of the price.