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Claude Opus 4.8: Modest, but With Tangible Improvement

Claude Opus 4.8 is Anthropic’s flagship generative AI model, built on Opus 4.7 to deliver advanced performance at the same price tier. It is optimized for high-stakes workflows, complex reasoning and long-horizon tasks across major cloud platforms.

The model introduces sharper judgment, heightened honesty with four times reduction in unremarked code flaws and improved agentic autonomy.

Technical Specs of Claude Opus 4.8

• Context Window: 1 million tokens
• Knowledge Cutoff: January 2026
• Max Output: 128,000 tokens
• API Pricing Tier: $5.00 per million input tokens and $25.00 per million output tokens

Key Improvements of Claude Opus 4.8

Sharper Judgment and Honesty

Claude Opus 4.8 introduces a significant breakthrough in reliability. The model is roughly four times less likely than its predecessor, Opus 4.7, to let flaws in its written code pass by unremarked, aggressively lowering the rate of unsupportable claims and false positives.

Advanced Agentic Workflows

The model delivers a notable performance boost in agentic automation and reasoning tasks. In software environments like Claude Code, it orchestrates a new “dynamic workflows” framework that can deploy and manage hundreds of parallel subagents simultaneously.

Granular Capability and Cost Control

Users can access a flexible “effort control” setting to scale computational intensity up or down based on task difficulty, while an upgraded fast mode operates at 2.5× the standard speed at a cost rate 3 times cheaper than previous generations.

Claude Opus 4.8 vs Other Chat Models