Model
Claude Opus 4.8
Anthropic's most capable model, improving on Opus 4.7 for long-horizon agentic coding, reasoning-effort calibration, and tool triggering.
Closed sourcereasoningClaude Opusgenerally availableReleased 2026-05-281M context128K max outputAnthropicOfficial page
Model metadata
Modalities: text, imageInput: $5/MTokOutput: $25/MTokAPI ID: claude-opus-4-8