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fix(copilot): add gpt-5.3-codex fallback model#13172

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hyf0 wants to merge 3 commits intoanomalyco:devfrom
hyf0:fix/copilot-gpt-5-3-codex
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fix(copilot): add gpt-5.3-codex fallback model#13172
hyf0 wants to merge 3 commits intoanomalyco:devfrom
hyf0:fix/copilot-gpt-5-3-codex

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@hyf0 hyf0 commented Feb 11, 2026

Summary

  • add a Copilot-side fallback that injects gpt-5.3-codex when models.dev has not rolled it out yet
  • align fallback metadata with model release (release_date/last_updated = 2026-02-05)
  • preserve existing Copilot behavior for costs and npm provider wiring

Upstream model catalog PR: anomalyco/models.dev#857

Closes #12954

Copilot AI review requested due to automatic review settings February 11, 2026 16:19
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The following comment was made by an LLM, it may be inaccurate:

No duplicate PRs found.

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Pull request overview

This PR adds a client-side fallback mechanism for the gpt-5.3-codex model in the GitHub Copilot plugin, ensuring the model is available even before the upstream models.dev catalog includes it. The implementation creates a fallback model by copying properties from existing Codex models (prioritizing gpt-5.2-codex, then 5.1-codex-max, 5.1-codex, and 5.1-codex-mini) and overriding key fields.

Changes:

  • Added ensureGpt53Codex function to inject gpt-5.3-codex model when missing from provider catalog
  • Integrated the fallback into the Copilot auth loader to ensure model availability
  • Aligned release date with official model announcement (2026-02-05)

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hyf0 commented Feb 12, 2026

anomalyco/models.dev#857 is merged. Guess we could just wait for its release.

@hyf0 hyf0 closed this Feb 12, 2026
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[FEATURE]: 5.3 Codex for Github Copilot provider

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