2026

What's New

Game-changing features you should know about

Claude Code

GAME CHANGER

Agent Teams — Peer-to-Peer AI Collaboration

Multiple Claude agents can now communicate directly with each other, sharing context and coordinating complex tasks. Think code review → fix → re-review cycles, all autonomous.

MASSIVE

Hooks System — Event-Driven Automation

PreToolUse, PostToolUse, PreCompact, PostCompact hooks let you automate linting, security checks, and context preservation. Claude Code becomes programmable.

POWERFUL

Background Agents + Git Worktrees

Spawn agents that work in isolated git worktrees in the background. Start a refactor, keep coding — the agent creates a branch with its changes when done.

GPT Codex

GAME CHANGER

Layered AGENTS.md — Global to Local Repo Context

Codex now works best with an instruction chain: personal guidance, repo rules, and nested overrides. You can keep durable team conventions close to the code instead of repeating them in every task.

POWERFUL

Sandbox + Approval Policies — Fast Local Automation with Guardrails

Local Codex is most practical when sandbox mode and approval policy are tuned together. Workspace-write plus on-request gives you fast edits and test runs without handing over your whole machine.

REVOLUTIONARY

Cloud Environments — Setup Scripts, Offline Agents, Optional Internet

Cloud Codex separates setup from execution: install and bootstrap first, then run the agent in a tighter environment. Internet access stays off by default and can be narrowed with allowlists when needed.

Gemini CLI

SAFE

Plan Mode — Read-Only Design Sandbox

Before editing any code, use /plan to enter a strict read-only mode to explore and draft your architecture. Only approved plans get executed.

EFFICIENT

Sub-agents — Delegate to Experts

Offload batch refactoring to the Generalist and bug hunting to the Codebase Investigator. Save your main context window and maximize throughput.

POWERFUL

Agent Skills — Override Agent Behavior

Summon specialized workflows like security-review, or use skill-creator to teach the agent your team's unique deployment checklist.