
OpenAI Codex in March 2026: What's New and What It Can Do Now
March 2026 was the month Codex started making sense as a full agent system rather than a loose collection of surfaces. GPT-5.4 became the new core model, GPT-5.4 mini changed cheaper task routing, Codex Security entered research preview, and the app made parallel agents, worktrees, skills, and automations much easier to use.




![Nano Banana 2 API Proxy Comparison: Price, Stability & True Cost Analysis [2026]](/posts/en/nano-banana-2-api-proxy-comparison/img/cover.png)
















































![OpenClaw Doctor and Gateway Restart: Complete Troubleshooting Guide [2026]](/posts/en/openclaw-doctor-gateway-restart/img/cover.png)


















![Nano Banana 2 API Pricing Explained: Official vs Proxy Cost Comparison [2026]](/posts/en/nano-banana-2-api-pricing-guide/img/cover.png)















































![Fix Gemini 3 Pro Image 503 Overloaded: Complete Troubleshooting Guide [2026]](/posts/en/fix-gemini-3-pro-image-503-overloaded/img/cover.png)















































![Fix OpenClaw context_length_exceeded: Complete Troubleshooting Guide [2026]](/posts/en/openclaw-context-length-exceeded/img/cover.png)




![Fix OpenClaw Rate Limit Exceeded (429): Complete Troubleshooting Guide [2026]](/posts/en/openclaw-rate-limit-exceeded-429/img/cover.png)
![Fix OpenClaw Invalid Beta Flag Error: Complete Guide [2026]](/posts/en/openclaw-invalid-beta-flag/img/cover.png)

![Fix OpenClaw Anthropic API Key Error: Complete Guide [2026]](/posts/en/openclaw-anthropic-api-key-error/img/cover.png)

![Gemini 3 Complete Comparison: Pro, Flash, Nano Banana Pro Full Guide [2026 Update]](/posts/en/gemini-3-comparison/img/cover.png)






