Alpha· Major · Confirmed
Ultra reasoning, OAuth-enabled plugin MCP, and remote-control pairing arrive
Codex added Ultra reasoning effort, OAuth for executor-routed HTTP MCP servers, and a daemon pairing command for remote control.
This was a broad capability window: model-control options expanded, selected plugins gained authenticated HTTP MCP support, and remote-control setup gained an explicit pairing flow.
Alpha release context: 4 official tags were published that UTC day (rust-v0.143.0-alpha.16, rust-v0.143.0-alpha.21, rust-v0.143.0-alpha.22, rust-v0.143.0-alpha.25). The full comparison contains 57 commits and at least 300 changed files.
Evidence
Codex adds Ultra as a reasoning-effort option.Why it matters: Users and integrations can request a higher reasoning setting where the selected model and environment support it.
Direct evidence · Confirmed
Supporting sources
- [codex] Add Ultra reasoning effort (#29899) commit · Official
- rust-v0.143.0-alpha.15 to rust-v0.143.0-alpha.25 comparison tag-compare · Official
Conflicting sources
No conflicting sources recorded.
HTTP MCP servers supplied by selected executor plugins can use OAuth.Why it matters: Plugin-provided remote MCP services can participate in an authenticated flow instead of being limited to unauthenticated HTTP connections.
Direct evidence · Confirmed
Supporting sources
- Support OAuth for HTTP MCP servers from selected executor plugins (#28529) commit · Official
- rust-v0.143.0-alpha.15 to rust-v0.143.0-alpha.25 comparison tag-compare · Official
Conflicting sources
No conflicting sources recorded.
Remote control gains a daemon pairing command.Why it matters: Remote-control clients get a dedicated setup path for pairing with the daemon.
Direct evidence · Confirmed
Supporting sources
- feat(remote-control): add daemon pairing command (#29913) commit · Official
- rust-v0.143.0-alpha.15 to rust-v0.143.0-alpha.25 comparison tag-compare · Official
Conflicting sources
No conflicting sources recorded.
Availability
Availability note: these sources establish repository and CLI release activity. They do not, by themselves, prove that the same changes were live in Codex Desktop.
Availability by surface
| Surface | Status | Claim-level evidence |
|---|---|---|
| CLI | Prerelease · Documented · General |
|
| Desktop | Unknown · Unknown · Unknown |
|
| IDE | Unknown | No central-claim assertion recorded. |
| Cloud | Unknown | No central-claim assertion recorded. |
| Mobile | Unknown | No central-claim assertion recorded. |