GPT-5 Image Mini vs GPT-5.1-Codex: side-by-side summary

GPT-5 Image Mini and GPT-5.1-Codex are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5 Image Mini, from OpenAI, has a 400,000-token context window and is priced at $2.50/M tokens input, $2/M tokens output on OpenRouter.

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.

Context window

• GPT-5 Image Mini: 400,000 tokens
• GPT-5.1-Codex: 400,000 tokens

Price

• GPT-5 Image Mini: $2.50/M tokens input, $2/M tokens output
• GPT-5.1-Codex: $1.25/M tokens input, $10/M tokens output

Provided by

• GPT-5 Image Mini: OpenAI
• GPT-5.1-Codex: OpenAI

• GPT-5 Image Mini model details, providers and pricing
• GPT-5.1-Codex model details, providers and pricing