OpenAI Codex Hidden Trick: Enabling Max Reasoning Slashes Costs

OpenAI Codex users discovered that manually enabling the default-off Max reasoning effort option significantly reduces costs. This mode allows the Luna model to match Opus-level performance while cutting costs by 83%.

2026-07-31 ~ 2026-08-01 · 2 related posts

• Codex Users: Enable Max Reasoning for Opus-Level Performance at 1/6 the Cost — daniel_mac8 · 2026-07-31
• OpenAI Codex Tip: Enable Max Reasoning for Luna at 1/6th the Cost — daniel_mac8 · 2026-08-01