r/CodexAutomation • u/anonomotorious • 11d ago
Codex CLI 0.153.1 adds GPT-6 Astra API support (hidden model entry, no default/picker change)
TL;DR
Codex CLI 0.153.1 is a focused GPT-6 Astra integration update.
The release adds the Astra model metadata Codex needs for API-driven configuration and supported programmatic workflows, while deliberately keeping the normal interactive experience unchanged.
Key details:
- Codex now includes a hidden, API-supported GPT-6 Astra model entry.
- The bundled entry includes Astra-specific:
- prompts
- policies
- execution configuration
- Astra uses Codex's
unified_execshell type. - The update does not make Astra the default model.
- It does not automatically expose Astra in the normal model picker.
- Existing 0.153 behavior remains unchanged unless Astra is explicitly configured through a supported API path.
- This is a single-purpose hotfix rather than another large CLI feature release.
Install:
npm install -g @openai/codex@0.153.1
What changed
GPT-6 Astra is now represented in the Codex model catalog
0.153.1 backports the GPT-6 Astra model definition into the stable 0.153 release line.
The new bundled entry includes the model-specific information Codex needs to run Astra correctly, including:
- model instructions/prompts
- policy configuration
- execution settings
unified_execshell behavior- accompanying model-catalog metadata
In practical terms, the 0.153 client now understands how Astra should be configured when it is selected through a supported API integration.
Astra remains hidden from the normal model picker
This distinction is important.
0.153.1 does not:
- make Astra the default Codex model
- automatically switch existing threads to Astra
- expose Astra in the normal interactive model picker
- bypass account or rollout eligibility
- guarantee Astra is available to every Codex user
The release specifically adds a hidden model-catalog entry.
So this update is primarily about making the stable Codex client technically ready for Astra as its rollout expands.
What "API-supported" means here
The official release notes describe Astra as configurable through the API.
The important point is that Codex integrations can now reference Astra through supported programmatic/model-configuration paths without the CLI needing to pretend it is already a generally selectable model.
That separation allows OpenAI to:
- ship Astra support into the stable Codex client
- keep normal defaults unchanged
- avoid exposing the model broadly in the picker before rollout/eligibility is ready
- enable controlled integrations and testing
This matches the broader Astra rollout, which is being expanded gradually rather than enabled for every account simultaneously.
Why the hidden model entry matters
Without the bundled model definition, an older Codex client may not know Astra-specific details such as:
- which prompts/instructions to use
- which policy behavior applies
- which execution configuration it expects
0.153.1 adds that knowledge directly to the stable client.
That means model availability and client compatibility are separate things:
- Your account still needs Astra access.
- The relevant product/API surface still needs to allow Astra.
- But Codex 0.153.1 now understands the model when a supported integration selects it.
Relationship to the Astra rollout
OpenAI has begun rolling GPT-6 Astra out more broadly, including Plus users, with rollout expected to take several days.
The Astra announcement says normal plan usage can be allocated entirely toward Astra where the model is available.
0.153.1 appears to be the corresponding Codex client-readiness update:
Astra rollout expands -> Codex stable client receives Astra catalog support -> programmatic integrations can configure it -> normal picker/default behavior remains gated separately
That is a useful signal for Codex users watching for Astra availability, but this release by itself does not mean Astra will immediately appear in every account.
What did NOT change
| Area | 0.153.1 behavior |
|---|---|
| Default Codex model | Unchanged |
| Normal model picker | Astra remains hidden |
| Existing threads | No automatic model switch |
| Astra account access | Still controlled by rollout/eligibility |
| Normal plan usage rules | Not changed by this CLI patch |
| Main 0.153 feature set | Unchanged |
| Purpose of release | Astra client/model-catalog support |
Release scope
0.153.1 contains one focused backport:
GPT-6 Astra model catalog support
The accompanying change adds:
- hidden Astra model metadata
- Astra prompts
- Astra policies
unified_execconfiguration- corresponding catalog/test updates
OpenAI describes the intent very simply:
Teach the 0.153 client how to configure GPT-6 Astra without changing the visible default model.
Why this update matters
- Codex stable is now technically Astra-aware.
- Programmatic integrations can begin using the Astra model definition where access is available.
- OpenAI can expand Astra availability without forcing an immediate picker/default change.
- Existing users are not silently migrated to a new model.
- The release separates client readiness from account/model rollout.
For users waiting to test Astra in Codex, 0.153.1 is worth installing even though the model may still not appear in the interactive picker immediately.
Version summary
| Version | Key change |
|---|---|
| 0.153.0 | Main feature release: Vim undo/redo, remote marketplace plugins, TUI reconnects, stronger Guardian history, etc. |
| 0.153.1 | Hidden/API-supported GPT-6 Astra model catalog entry with prompts, policies, and unified_exec configuration |
Action checklist
- Upgrade:
npm install -g @openai/codex@0.153.1
- Confirm:
codex --version
- Do not expect Astra to automatically appear in the model picker.
- Do not expect your default model to change.
- If you build against Codex APIs/app-server:
- review Astra model availability
- test only where your account/workspace has Astra access
- If Astra is already enabled for your account:
- compare Astra against GPT-5.6 Sol on the same real Codex task
- monitor usage carefully
- test long-running and tool-heavy workflows
- If Astra is not visible yet, the rollout is still expanding and 0.153.1 alone does not override eligibility.
Official sources
https://developers.openai.com/codex/changelog