GPT-5.1-Codex vs Qwen3 Embedding 4B: side-by-side summary

GPT-5.1-Codex and Qwen3 Embedding 4B 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.

Qwen3 Embedding 4B, from Qwen, has a 32,768-token context window and is priced at $0.02/M tokens on OpenRouter.

Context window

• GPT-5.1-Codex: 400,000 tokens
• Qwen3 Embedding 4B: 32,768 tokens

Price

• GPT-5.1-Codex: $1.25/M tokens input, $10/M tokens output
• Qwen3 Embedding 4B: $0.02/M tokens

Provided by

• GPT-5.1-Codex: OpenAI
• Qwen3 Embedding 4B: Qwen

• GPT-5.1-Codex model details, providers and pricing
• Qwen3 Embedding 4B model details, providers and pricing