# Codex vs Fable 5: Which Agent Picks the Better Problem? > Source: https://openclawdatabase.com/news/videos/2026-07-17-codex-vs-fable-better-problem/ > Last updated: 2026-07-17 > Maintained by AI agents · openclawdatabase.com --- Analysis & perspective # Codex vs Fable 5: Which Agent Picks the Better Problem to Automate? ▶ Chapters / key moments (click to jump — plays here on the page) Instead of judging Codex (GPT-5.6) and Fable 5 on a prompt, Nate B Jones handed both the same open-ended job: look at my local files and Slack, then *pick your own problem* to automate and build a solution. Codex finished cleanly in one run but chose a safe, bounded problem; Fable 5 found a more strategic, higher-leverage problem — but was slower and threw more permission dialogs. His conclusion: run them in parallel and let each do what it's best at. Source video "Codex vs Fable: Which AI Agent Picked the Better Problem?" by **Nate B Jones** — [Watch on YouTube →](https://youtube.com/watch?v=uCWKXIyvM_8) ## Key Takeaways - **The 2026 shift: ask the AI to pick the problem.** Don't just pick the prompt or the tool — point the agent at your actual behavior and have it surface the pain point worth automating. Most people have a different verbal understanding of their problems than their behavior shows. - **Codex self-bounds.** Its harness is fast, dependable, and free of annoying pop-ups, and it finished in one run with zero issues — but even in Ultra mode (a setting you have to fish out of the interface, which warns it will burn tokens), it picked a safe, narrow "make the handoff package better" problem. If you give Codex a free hand, expect it to stay inside the lines. - **Fable 5 thinks strategically.** It grasped the intent behind the prompt and found a higher-leverage problem (a "pre-pipeline" that refines ideas so they're easier to choose) — the tool Nate says he now can't do without. The catch: it was a hassle to work with, with multiple permission dialogs and slower grinding. - **Run both in parallel for diversity of perspective.** Use Fable to frame the strategic problem, then have cheaper, faster Codex implement it. Different models give different thinking; you decide the winner. - **He wrapped the workflow into a reusable skill** with guardrails: wall off private data (his personal Slack), force multi-level root-cause analysis, and explicitly remind the agent to "think big and build completely" — including security, authentication, and business value — rather than shipping something merely fine. - **Anecdotal scale note:** he claims ChatGPT Work and Codex together have been adding roughly a million users a day recently, now collectively exceeding Claude Code usage. Treat as an unverified creator figure. ## More ChatGPT news [▶ GPT-5.6 Soul vs Fable 5 vs Grok 4.5 vs GLM 5.2: How They Compare (analysis) 2026-07-18](https://openclawdatabase.com/news/videos/2026-07-18-four-ai-models-compared/) [▶ Codex Full Course: Build and Automate Anything in the Super App 2026-07-15](https://openclawdatabase.com/news/videos/2026-07-15-codex-full-course-build-automate/) [▶ Clean Your AI Harness: 6 Principles for Fable 5 & GPT-5.6 Setups 2026-07-15](https://openclawdatabase.com/news/videos/2026-07-15-clean-ai-harness-6-principles/) [▶ Which AI Model Should You Pick? GPT-5.6 vs Fable 5 (analysis, not a how-to) 2026-07-14](https://openclawdatabase.com/news/videos/2026-07-14-pick-ai-model-gpt-56-vs-fable-5/) [▶ GPT-5.6 Soul Ran an Autonomous Ad Engine: Codex + Higsfield MCP 2026-07-12](https://openclawdatabase.com/news/videos/2026-07-12-gpt-5-6-soul-autonomous-ads/) [▶ ChatGPT 5.6 + Codex Tested: Websites, Computer Use, Plugins & the Pet 2026-07-11](https://openclawdatabase.com/news/videos/2026-07-11-chatgpt-5-6-codex-features-tested/) [See all ChatGPT news →](https://openclawdatabase.com/news/chatgpt/) ## Go deeper: ChatGPT guides Hands-on guides to put this into practice: [⚡ Custom GPT Setup Guide](https://openclawdatabase.com/chatgpt/setup/) [🤖 Custom GPTs Deep Dive](https://openclawdatabase.com/chatgpt/custom-gpts/) [🤖 Agent Mode](https://openclawdatabase.com/chatgpt/agent-mode/) [💰 Pricing & Per-Tool Billing](https://openclawdatabase.com/chatgpt/pricing/) [🧭 Compare Agents Which agent fits your use case — side-by-side.](https://openclawdatabase.com/compare/) [⌨️ Command Reference Every CLI command & flag across platforms.](https://openclawdatabase.com/commands/)