Anthropic: Claude Opus 4.8 (Fast)

Claude Opus 4.8 (Fast) is Anthropic's multimodal model accepting text, image, and file inputs, with a context window of 1,000,000 tokens and a maximum output of 128,000 tokens. It supports tool use and reasoning, making it suitable for agentic workflows, long-document analysis, and multi-step tasks. Structured output support is unconfirmed based on available data. At $10.00 per million input tokens and $50.00 per million output tokens, this sits at a premium price point relative to many alternatives. Buyers who need the large context window alongside reasoning and tool capabilities have concrete reasons to evaluate it. However, there is currently no independent benchmark coverage to validate performance claims, so teams with rigorous quality requirements should treat it as unproven until third-party evaluations are available and plan their own internal testing before committing at scale.