I’m currently a ChatGPT 5x Pro user and on the Claude 20x plan . I use Claude Opus 5 Max for most of my coding work, and while I really like it, it’s honestly fucking slow. Fast Mode also isn’t included in the subscription, so using fast mode is very expensive. My Claude plan expires this week, which also lines up with the end of their 50% extra usage promo , so I’m seriously considering switching to the Codex 20x plan especially now that Codex offers up to 800k context on the subscription plan. My main concern is usage. I’ve had some bad experiences with Codex where my weekly allowance seemed to drain surprisingly fast. For example, I used Sol xhigh on a single task in Standard Mode. The conversation didn’t even reached and compacted on 280k context , but that task still consumed roughly 1% of my weekly usage . That makes me wonder how Codex compares with Claude in real-world heavy usage, not just benchmarks. For people who regularly use both Codex and Claude at the higher tiers : How does Codex 20x usage actually compare with Claude 20x? Does Codex burn through the weekly allowance quickly on large coding tasks? How good is Sol xhigh vs. Opus 5 for difficult coding, debugging, refactoring, and long-running agentic tasks? Which one is more reliable when working with very large codebases/context windows? I’m especially interested in opinions from people who have used both heavily , rather than people judging from benchmarks or occasional use. Thanks! submitted by /u/Effective_Tap_9786
Originally posted by u/Effective_Tap_9786 on r/ClaudeCode
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