Implementation Plan: T5-P4-A5-WP1 Replace three-way gpt-5.5 collision in CODEX_MODEL_ALIASES#4097
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Trecek merged 3 commits intoJun 12, 2026
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Replace the degenerate three-way gpt-5.5 collision in CODEX_MODEL_ALIASES with three distinct real OpenAI model IDs aligned with CODEX_EFFORT_MAPPING semantics: - gpt-5.5 (opus/xhigh) - gpt-5.4 (sonnet/high) - gpt-5.4-mini (haiku/medium) Add a model_class() utility function for cross-backend opus/sonnet/haiku tier resolution via suffix stripping, identity check on CLAUDE_MODEL_ALIASES keys, and reverse-map on CODEX_MODEL_ALIASES values. Thread the new symbol through the re-export chain and add architecture and unit tests. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Guard against silent silent-drop in _CODEX_MODEL_REVERSE dict comprehension when duplicate values in CODEX_MODEL_ALIASES would cause one alias to become unreachable via model_class(). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…nst TypeError Backends that cannot be default-constructed would raise TypeError rather than a meaningful assertion failure. Skip such backends with an explanatory message so the test degrades gracefully instead of masking the real invariant. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Trecek
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t5-p4-a5-wp1-replace-the-three-way-gpt-5-5-collision-in-code/4022
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Summary
Replace the degenerate three-way
gpt-5.5collision inCODEX_MODEL_ALIASESwith three distinct real OpenAI model IDs aligned withCODEX_EFFORT_MAPPINGsemantics:gpt-5.5(opus/xhigh),gpt-5.4(sonnet/high),gpt-5.4-mini(haiku/medium). Implement amodel_class()utility function for cross-backend opus/sonnet/haiku tier resolution via suffix stripping, identity check onCLAUDE_MODEL_ALIASESkeys, and reverse-map onCODEX_MODEL_ALIASESvalues. Thread the new symbol through the re-export chain and add architecture and unit tests.Implementation Plan
Plan file:
/home/talon/projects/autoskillit-runs/impl-20260612-150756-734470/.autoskillit/temp/make-plan/t5_p4_a5_wp1_replace_gpt55_collision_plan_2026-06-12_151500.mdCloses #4022
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Token Usage Summary
* Step used a non-Anthropic provider; caching behavior may differ.
Token Efficiency
Model Usage Breakdown