OpenAI staffer reach_vb notes that after updating Codex and selecting Astra, enabling [features.context_management] experimental_mode = true in ~/.codex/config.toml lets the agent keep notes across context windows and search earlier messages and tool outputs (including details missing from its notes)—useful for long debugging and large refactors. Requires ChatGPT Plus, Pro, or Pro Lite.

Key Takeaways

  • ✓Enable: update Codex, select Astra, set experimental_mode = true in ~/.codex/config.toml.
  • ✓Capability: notes across context windows plus search over earlier messages/tool outputs.
  • ✓Access: ChatGPT Plus/Pro/Pro Lite; aimed at long debugging and large refactors.
⚡

Key Decision Metrics at a Glance

TL;DR Verdict
🏆 Benchmark RankRank
See how it ranks on the leaderboard
Full Leaderboard→
💰 Cost & PlansCompare
GPT-5.6 Sol · in: $5 / out: $30
Compare Plans↗
🛠️ Ecosystem & IDERules
Codex · Astra · context_management
Setup IDE Rules↗
🧭

Turn your technical choice into a development budget

Compare 40 dev plans & simulate token costs vs $20/mo subscriptions

⚔️ Compare Model→💰 Compare plans & limits↗
Action HubReady to adopt this in production?

Benchmark side-by-side against alternatives, or calculate monthly token cost vs subscription break-even.

⚔️ Launch VS Compare→💳 View Plans↗
Up NextOpenAI Astra quality fixes + same-day reset: skill misfires, context experiment, bad engines
Read Now→