A Continuation of the Opus 4.8 vs. GPT-5.5 Rematch In the last round I compared Opus 4.8 in Claude Code with GPT-5.5 in Codex on the same 3D maze runner challenge I had used before. Both did well. GPT-5.5 was faster, Opus 4.8 handled the player mode better, and both were already far ahead of the older Opus 4.5 vs. Kimi 2.5 run. But the model I originally wanted to test in that rematch was Fable. I missed it by a day. So this is the follow-up: the same challenge, this time with Fable 5. Fable 5 This run was slower than the previous two, but also more methodical. Fable 5 spent more time up front planning and testing, and that became the defining difference. Timeline: 01:50 - Implementation plan ready. 05:35 - First code and config files written. 06:15 - npm dependencies installing. 08:23 - Test cases being created. 09:01 - Unit testing starts. 09:12 - Unit tests complete. 09:14 - Browser tests start. 10:06 - Playwright browser window appears. 11:11 - Code update, then Pla...