INTELLECT-3 vs Qwen3.5 Plus 2026-02-15: side-by-side summary

INTELLECT-3 and Qwen3.5 Plus 2026-02-15 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

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

Qwen3.5 Plus 2026-02-15, from Qwen, has a 1,000,000-token context window and is priced at $0.26/M tokens input, $1.56/M tokens output on OpenRouter.

Context window

• INTELLECT-3: 131,072 tokens
• Qwen3.5 Plus 2026-02-15: 1,000,000 tokens

Price

• INTELLECT-3: Pricing varies by provider
• Qwen3.5 Plus 2026-02-15: $0.26/M tokens input, $1.56/M tokens output

Provided by

• INTELLECT-3: prime-intellect
• Qwen3.5 Plus 2026-02-15: Qwen

• INTELLECT-3 model details, providers and pricing
• Qwen3.5 Plus 2026-02-15 model details, providers and pricing