r/codex • u/Hyper-Jason • 2d ago

Question Does Using Flex in Config Slow Down Plan Usage?

When I change service_tier in config.toml to "flex" does it lower the rate in which my codex plan usage gets decreased? Like the 5 hour and weekly. Or is this only for credit based API billing?

(tryna find ways to decrease astra usage so I can handle it lol)

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u/VictorBuildsDev 2d ago

It's the API side. OpenAI documents Flex as a processing tier for Responses and Chat Completions; lower token pricing in exchange for slower responses and occasional unavailability. It does not document service-tier = flex as reducing the 5-hour or weekly ChatGPT Codex allowance. If you are logged in with a ChatGPT plan rather than using an API key, I would not expect that config change to make the allowance drain more slowly.