GPT-5.1 Codex Mini

GPT-5.1 Codex mini is OpenAI's smaller, faster, and more cost-effective coding model in the Codex family, optimized for routine software-engineering tasks such as bug fixes, test generation, code review, and repo-aware agentic workflows. It accepts text and image inputs and is designed for high-frequency, CI-style developer automation at lower cost than the full GPT-5.1 Codex. Source: supabase.