Claude Opus 4.8

Claude Opus 4.8 is Anthropic’s flagship Claude-family model released on May 28, 2026, succeeding Claude Opus 4.7. Standard pricing matches the predecessor ($5/$25 per million input/output tokens), while fast mode is three times cheaper than on Opus 4.7 and 4.6 ($10/$50 per million tokens) at 2.5× the generation speed.

Anthropic reports that Opus 4.8 is roughly four times less likely than its predecessor to let flaws in its own code pass unremarked, and the alignment assessment shows substantially lower rates of misaligned behavior (e.g., deception) than Opus 4.7. The release ships alongside dynamic workflows in Claude Code (hundreds of parallel subagents) and an effort control (low/medium/high/extra/max) in claude.ai and Cowork.

The model is available via the claude-opus-4-8 identifier in the Claude API, in claude.ai apps (Free, Pro, Max, Team, Enterprise plans), and on partner cloud platforms.