Introducing GPT-5.3-Codex. Learn More
Steer mode is now stable and enabled by default, so Enter sends immediately during running tasks while Tab explicitly queues follow-up input. (#10690)

Bug Fixes

Fixed resumeThread() argument ordering in the TypeScript SDK so resuming with local images no longer starts an unintended new session. (#10709)
Fixed model-instruction handling when changing models mid-conversation or resuming with a different model, ensuring the correct developer instructions are applied. (#10651, #10719)
Fixed a remote compaction mismatch where token pre-estimation and compact payload generation could use different base instructions, improving trim accuracy and avoiding context overflows. (#10692)
Cloud requirements now reload immediately after login instead of requiring a later refresh path to take effect. (#10725)

Chores

Restored the default assistant personality to Pragmatic across config and related tests/UI snapshots. (#10705)
Unified collaboration mode naming and metadata across prompts, tools, protocol types, and TUI labels for more consistent mode behavior and messaging. (#10666)

#10709 fix: ensure resume args precede image args @cryptonerdcn
#10705 chore(config) Default Personality Pragmatic @dylan-hurd-oai
#10651 fix(core) switching model appends model instructions @dylan-hurd-oai
#10666 Sync collaboration mode naming across Default prompt, tools, and TUI @charley-oai
#10690 Make steer stable by default @aibrahim-oai
#10692 Fix remote compaction estimator/payload instruction small mismatch @charley-oai
#10725 Reload cloud requirements after user login @xl-openai
#10719 fix(core,app-server) resume with different model @dylan-hurd-oai