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Topics: AI / ML Full archive →

The Wire · Showcase

CODEX HOTFIX CORRECTS GPT-5.6 CONTEXT WINDOWS AFTER BUNDLED INSTRUCTION REFRESH

By RepoJournal · Filed · About OpenAI

copyberry github-actions[bot]
2 people shipped this
copyberry @copyberry 4 cited github-actions[bot] @github-actions[bot] 1 cited

Codex 0.144.6 shipped overnight to fix context window mismatches across GPT-5.6 Sol, Terra, and Luna after bundled instruction metadata got out of sync with the models themselves.

The hotfix [1] is a critical catch for anyone running inference against the latest GPT-5.6 variants in production. Those three models now correctly report 272,000 token context windows instead of the inflated figures that shipped in 0.144.5, which means your prompt caching and token budgeting will no longer silently exceed actual limits. In parallel, the team landed four substantial feature additions across realtime and tool integrations. You can now seed realtime V3 sessions with initial text items [2], which eliminates the cold-start delay for resuming conversations and gives you better control over session bootstrap. Audio output support is live for dynamic tools and code mode [3], converting MCP audio blocks into model input and providing helpers for inline data URLs. The legacy thread history pagination support [4] ensures clients using full-history resume work consistently across both paginated and non-paginated thread implementations. Finally, a performance win landed: TUI redraws during streaming now only trigger when the visible tail actually changes [5], cutting unnecessary screen flicker and reducing CPU overhead during long-running operations.

Action items

References

  1. [1] 0.144.6 ↗ openai/codex
  2. [2] Seed realtime V3 sessions with initial text items ↗ openai/codex
  3. [3] Add audio output support to dynamic tools and code mode ↗ openai/codex
  4. [4] Support legacy views for paginated thread history ↗ openai/codex
  5. [5] Avoid redundant TUI redraws while streaming ↗ openai/codex

Quick answers

What shipped in OpenAI on July 19, 2026?
Codex 0.144.6 shipped overnight to fix context window mismatches across GPT-5.6 Sol, Terra, and Luna after bundled instruction metadata got out of sync with the models themselves. In total, 8 commits, 8 pull requests, and 2 releases landed.
Who contributed to OpenAI on July 19, 2026?
2 developers shipped this update, including github-actions[bot] and copyberry.
What were the notable OpenAI updates?
0.144.6, Seed realtime V3 sessions with initial text items, and Add audio output support to dynamic tools and code mode.

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Codex made parent-controlled sub-agent threads read-only in the TUI to prevent rejected server operations, while the Node and Python SDKs are closing security holes across GitHub Actions permissions, error handling, and dependency chains.

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CODEX SHIPS PAGINATED HISTORY INHERITANCE FOR SUBAGENTS

Codex now preserves conversation context when spawning child agents, fixing a critical gap in multi-agent workflows where history was getting lost on fork.

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CODEX TIGHTENS MCP PLUMBING WHILE NODE SDK SHIPS ASYNC STREAMING

Codex is systematizing how agents talk to external tools: concurrent writes now serialize, tool catalogs cache across sessions, and failure details stick around through imports.

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CODEX FIXES GUARDIAN ALIGNMENT AND THREAD HISTORY DURABILITY

Codex shipped critical fixes for Guardian review configuration and SQLite projection recovery, ensuring conversation history stays consistent even when materializations fail.

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