#Responses API

2 guides

Codex config.toml defining a custom model provider

Configure a Custom Model Provider in Codex

Configure a custom Codex model provider safely, match its wire protocol and model catalog, protect credentials, and verify the provider before editing code.

MCSA Guru Team Aug 23, 2026 2 min read

Codex CLI using DeepSeek V4 Flash through the Responses API

AI Coding Tools & Models

Use DeepSeek V4 with Codex CLI on Windows or WSL

Connect Codex CLI, the Codex IDE extension, and the ChatGPT desktop app to DeepSeek V4 through the Responses API and a custom Codex model catalog.

MCSA Guru Team Jul 29, 2026 3 min read