# Claude Opus 4.8: AI model fact sheet

- **Provider:** anthropic
- **Released:** 2026-05-28
- **Context window:** 1,000,000 tokens
- **API pricing:** $5.00 / 1M input, $25.00 / 1M output
- **OpenRouter ID:** anthropic/claude-opus-4.8
- **Capabilities:** conversation, reasoning, code-generation, analysis, tool-use

Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, offers reasoning support, and has a 1M-token context window. Built for highly autonomous agents, long-horizon agentic work, and memory-driven tasks where coherence over extended sessions matters, it is particularly strong on multi-step reasoning, complex coding, and end-to-end project orchestration across large codebases, multi-stage debugging, and long-running asynchronous agent pipelines. Beyond coding, it handles knowledge work such as drafting documents, building presentations, and analyzing data while maintaining quality across very long outputs.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/claude-opus-4.8