GPT-5.1-Codex vs Qwen Plus 0728: side-by-side summary

GPT-5.1-Codex and Qwen Plus 0728 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.1-Codex, from OpenAI, has a 400,000-token context window and is priced at $1.25/M tokens input, $10/M tokens output on OpenRouter.

Qwen Plus 0728, from Qwen, has a 1,000,000-token context window and is priced at $0.26/M tokens input, $0.78/M tokens output on OpenRouter.

Context window

• GPT-5.1-Codex: 400,000 tokens
• Qwen Plus 0728: 1,000,000 tokens

Price

• GPT-5.1-Codex: $1.25/M tokens input, $10/M tokens output
• Qwen Plus 0728: $0.26/M tokens input, $0.78/M tokens output

Provided by

• GPT-5.1-Codex: OpenAI
• Qwen Plus 0728: Qwen

• GPT-5.1-Codex model details, providers and pricing
• Qwen Plus 0728 model details, providers and pricing