OpenAI's Codex now lets you plug in DeepSeek, Claude, and local models
OpenAI just turned its Codex coding agent into a model-agnostic platform, letting developers plug in any third-party model compatible with its Responses API. By tweaking a config.toml file, you can now run Codex on DeepSeek, Gemini, or offline via local Ollama models. Why it matters: OpenAI is loosening ecosystem lock-in, giving developers the freedom to balance cost, performance, and privacy.