Claude Opus 4.8 (Fast)Archive and alternatives
Claude Opus 4.8 (Fast) is no longer available on OpenRouter. Explore a current alternative below.
Released May 27, 2026
Specifications
Claude Opus 4.8 (Fast) at a glance
Context
1M tokens
Max output
128K tokens
Input
Text, Image, File
Output
Text
Input price
$10.00 / 1M
Output price
$50.00 / 1M
Capabilities
What it is good at
Catalog capabilities
- Accepts image input
- Generates text responses
- Supports tool calling
- Supports structured outputs
Good for
Compare
Compare Claude Opus 4.8 (Fast)
Claude Opus 4.8 (Fast) vs Claude Opus 5 (Fast)
Fast-mode variant of Opus 5 - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5. Learn more in Anthropic's docs:
Open comparisonClaude Opus 4.8 (Fast) vs Claude Sonnet 4.6 (batch)
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work.
Open comparisonClaude Opus 4.8 (Fast) vs Claude Sonnet 5 (batch)
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work.
Open comparisonFAQ
Questions about Claude Opus 4.8 (Fast)
Clear answers based on the model catalog and Krater access.