Claude Opus 4.5 vs INTELLECT-3: side-by-side summary

Claude Opus 4.5 and INTELLECT-3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Opus 4.5, from Anthropic, has a 200,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.

INTELLECT-3, from prime-intellect, has a 131,072-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Claude Opus 4.5: 200,000 tokens
• INTELLECT-3: 131,072 tokens

Price

• Claude Opus 4.5: $5/M tokens input, $25/M tokens output
• INTELLECT-3: Pricing varies by provider

Provided by

• Claude Opus 4.5: Anthropic
• INTELLECT-3: prime-intellect

• Claude Opus 4.5 model details, providers and pricing
• INTELLECT-3 model details, providers and pricing