Sonar Reasoning Pro vs Qwen3.8 Flash: side-by-side summary

Sonar Reasoning Pro and Qwen3.8 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Sonar Reasoning Pro, from Perplexity, has a 128,000-token context window and is priced at $2/M tokens input, $8/M tokens output on OpenRouter.

Qwen3.8 Flash, from Qwen, has a 1,000,000-token context window and is priced at $0.16/M tokens input, $0.47/M tokens output on OpenRouter.

Context window

• Sonar Reasoning Pro: 128,000 tokens
• Qwen3.8 Flash: 1,000,000 tokens

Price

• Sonar Reasoning Pro: $2/M tokens input, $8/M tokens output
• Qwen3.8 Flash: $0.16/M tokens input, $0.47/M tokens output

Provided by

• Sonar Reasoning Pro: Perplexity
• Qwen3.8 Flash: Qwen

• Sonar Reasoning Pro model details, providers and pricing
• Qwen3.8 Flash model details, providers and pricing