Aion-3.0-Mini vs Claude Opus 5 (Fast): side-by-side summary

Aion-3.0-Mini and Claude Opus 5 (Fast) are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Aion-3.0-Mini, from Aion Labs, has a 131,072-token context window and is priced at $0.70/M tokens input, $1.40/M tokens output on OpenRouter.

Claude Opus 5 (Fast), from Anthropic, has a 1,000,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.

Context window

• Aion-3.0-Mini: 131,072 tokens
• Claude Opus 5 (Fast): 1,000,000 tokens

Price

• Aion-3.0-Mini: $0.70/M tokens input, $1.40/M tokens output
• Claude Opus 5 (Fast): $10/M tokens input, $50/M tokens output

Provided by

• Aion-3.0-Mini: Aion Labs
• Claude Opus 5 (Fast): Anthropic

• Aion-3.0-Mini model details, providers and pricing
• Claude Opus 5 (Fast) model details, providers and pricing