Codex Knowledge Base
Open-Weight Models for Codex CLI: Choosing the Right Local Coding Agent in 2026
The open-weight model landscape for agentic coding has shifted dramatically in the past six months.
NVIDIA OpenShell and Codex CLI: Kernel-Level Sandboxing for Autonomous Coding Agents
Codex CLI ships with its own sandbox — a two-axis model combining approval policies and execution constraints .
GPT-5.5 Migration Cookbook: Effort Tuning, Cost Comparison, Prompt Adjustments
GPT-5.5 — codenamed Spud — landed on 23 April 2026, less than two months after GPT-5.4. It is already the recommended model for most Codex tasks.
DeepSeek V4 as a Codex CLI Provider: Frontier-Class Coding at a Fraction of the Cost
DeepSeek V4 landed today — 24 April 2026 — and the numbers deserve attention. V4-Pro scores 80.6% on SWE-bench Verified while charging $3.48 per million.
Cross-Agent Usage Analytics: Unified Monitoring for Your Mixed Coding Agent Stack
The average senior developer in 2026 runs two to five coding agents daily — Codex CLI for deep implementation, Claude Code for exploration.
Community Workflow Frameworks for Codex CLI: Superpowers, GSD, gstack, Spec Kit, OMX, and Compound Engineering Compared
Codex CLI ships with a deliberately minimal orchestration layer: an agent loop, a sandbox, hooks, and skills.
Community Framework Decision Guide: Which Workflow Framework Fits Your Team
If you have used Codex CLI for anything beyond single-shot prompts, you have almost certainly hit the now what? moment: your tasks need parallelism.
The Codex Subscription API: Programmatic Access to GPT-5.5 Through Your ChatGPT Plan
When OpenAI launched GPT-5.5 on 23 April 2026, a curious limitation accompanied the announcement: the model is available only through ChatGPT subscription.
Codex Labs and the GSI Network: What Enterprise-Scale Codex Deployment Means for CLI Power Users
On 21 April 2026, OpenAI announced Codex Labs alongside partnerships with seven Global Systems Integrators (GSIs) — Accenture, Capgemini, CGI, Cognizant.
The Codex CLI Speed Stack: Fast Mode, Reasoning Effort, Spark, and Performance Tuning
Codex CLI now ships four independent speed levers, each with its own trade-off envelope. This article maps every lever — Fast service tier, reasoning.