Update model alias and multiplier inventories for 2026-05-25

[Copilot]

Daily inventory surfaced three alias gaps (gpt-5.5, gpt-5.2, gemini-3.5-flash) and several missing multiplier keys for snapshot/legacy model IDs. This PR aligns built-in alias and multiplier registries with currently discovered provider model identifiers while preserving historical entries.

• Alias map updates (pkg/workflow/data/model_aliases.json)

  • Added dedicated aliases:
    • gpt-5.5 → copilot/openai gpt-5.5*
    • gpt-5.2 → copilot/openai gpt-5.2*
    • gemini-3.5-flash → copilot/google/gemini gemini-3.5*flash*

• Multiplier registry updates

  • Added missing dated GPT-4o snapshot IDs:
    • gpt-4o-2024-05-13, gpt-4o-2024-08-06, gpt-4o-2024-11-20 (0.33)
    • gpt-4o-mini-2024-07-18 (0.33)
  • Added legacy Copilot-exposed IDs:
    • gpt-4-o-preview, gpt-4-0613 (1.0)
    • gpt-3.5-turbo, gpt-3.5-turbo-0613 (0.0)
  • Applied in both runtime data sources:
    • pkg/cli/data/model_multipliers.json
    • actions/setup/js/model_multipliers.json

• Regression coverage

  • Extended alias expectations and explicit pattern assertions in pkg/workflow/model_aliases_test.go.
  • Added TestModelMultipliersInventoryUpdate20260525 in pkg/cli/effective_tokens_test.go for newly introduced multiplier keys.

• Release metadata

  • Added .changeset/patch-model-inventory-2026-05-25.md.

{
  "gpt-5.5": ["copilot/gpt-5.5*", "openai/gpt-5.5*"],
  "gpt-5.2": ["copilot/gpt-5.2*", "openai/gpt-5.2*"],
  "gemini-3.5-flash": [
    "copilot/gemini-3.5*flash*",
    "google/gemini-3.5*flash*",
    "gemini/gemini-3.5*flash*"
  ]
}

[Copilot]

Pull request overview

Routine daily model inventory update adding new alias entries and multiplier registry keys discovered against live providers, with matching regression tests and a changeset.

Changes:

• Add gpt-5.5, gpt-5.2, and gemini-3.5-flash aliases in pkg/workflow/data/model_aliases.json and extend alias tests.
• Add new GPT-4o dated snapshots, legacy GPT-4 and GPT-3.5-turbo IDs to both Go and JS multiplier registries, with a new dated regression test.
• Add changeset metadata for the patch release.

Show a summary per file

File	Description
pkg/workflow/data/model_aliases.json	Adds three new built-in aliases for newer GPT/Gemini families.
pkg/workflow/model_aliases_test.go	Extends expected/vendor family lists and adds exact-pattern assertions for the new aliases.
pkg/cli/data/model_multipliers.json	Adds GPT-4o dated snapshot and legacy GPT-4/GPT-3.5 multiplier entries.
actions/setup/js/model_multipliers.json	Mirrors the Go-side multiplier registry update for the JS action runtime.
pkg/cli/effective_tokens_test.go	Adds TestModelMultipliersInventoryUpdate20260525 covering the new multiplier keys.
.changeset/patch-model-inventory-2026-05-25.md	Adds patch changeset describing the inventory update.

Copilot's findings

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• Files reviewed: 6/6 changed files
• Comments generated: 0