>Between Opus aand GPT-5, it's not clear there's a substantial difference in software development expertise.
If there's no substantial difference in software development expertise then GPT-5 absolutely blows Opus out of the water due to being almost 10x cheaper.
Does OpenAI provide a $200/month option that lets me use as much GPT-5 I want inside of Codex?
Because if not, I'd still go with Opus + Claude Code. I'd rather be able to tell my employer, "this will cost you $200/month" than "this might cost you less than $200/month, but we really don't know because it's based on usage"
Is this actually true? Last I checked (a week ago?) Codex the agents were free at some tiers in a preview capacity (with future rate limits based on tier), but codex cli was not. With codex cli you can log in but the purpose of that is to link it to an API key where you pay per use. The sub tiers give one time credits you would burn through quickly.
> Availability and access
> GPT‑5 is starting to roll out today to all Plus, Pro, Team, and Free users, with access for Enterprise and Edu coming in one week. Pro, Plus, and Team users can also start coding with GPT‑5 in the Codex CLI (opens in a new window) by signing in with ChatGPT.
I just asked codex to copy a file and it took almost a minute to think about it and cost $0.05. This is something Claude Code would have done in seconds.
If there's no substantial difference in software development expertise then GPT-5 absolutely blows Opus out of the water due to being almost 10x cheaper.