AI Stack Registry — Models Index

- canonical: https://aistackregistry.com/snapshots/2026-04-15/models/index.md
- text: https://aistackregistry.com/snapshots/2026-04-15/models/index.txt
- json: https://aistackregistry.com/snapshots/2026-04-15/models/index.json
- as_of: 2026-04-15T03:14:05+00:00
- providers: 4
- models: 8

Browse
- providers_index_markdown: https://aistackregistry.com/snapshots/2026-04-15/models/providers/index.md
- providers_index_text: https://aistackregistry.com/snapshots/2026-04-15/models/providers/index.txt
- providers_index_json: https://aistackregistry.com/snapshots/2026-04-15/models/providers/index.json

Catalog
- provider=anthropic models=2 canonical=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/index.json browse_markdown=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/index.md browse_text=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/index.txt
- provider=anthropic model_id=claude-opus-4-6 canonical=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/claude-opus-4-6/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/claude-opus-4-6/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/claude-opus-4-6/recommended_defaults.json
- provider=anthropic model_id=claude-sonnet-4-6 canonical=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/claude-sonnet-4-6/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/claude-sonnet-4-6/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/anthropic/claude-sonnet-4-6/recommended_defaults.json
- provider=google models=3 canonical=https://aistackregistry.com/snapshots/2026-04-15/models/google/index.json browse_markdown=https://aistackregistry.com/snapshots/2026-04-15/models/google/index.md browse_text=https://aistackregistry.com/snapshots/2026-04-15/models/google/index.txt
- provider=google model_id=gemini-3.1-flash-image-preview canonical=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-flash-image-preview/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-flash-image-preview/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-flash-image-preview/recommended_defaults.json
- provider=google model_id=gemini-3.1-flash-lite-preview canonical=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-flash-lite-preview/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-flash-lite-preview/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-flash-lite-preview/recommended_defaults.json
- provider=google model_id=gemini-3.1-pro-preview canonical=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-pro-preview/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-pro-preview/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/google/gemini-3.1-pro-preview/recommended_defaults.json
- provider=openai models=1 canonical=https://aistackregistry.com/snapshots/2026-04-15/models/openai/index.json browse_markdown=https://aistackregistry.com/snapshots/2026-04-15/models/openai/index.md browse_text=https://aistackregistry.com/snapshots/2026-04-15/models/openai/index.txt
- provider=openai model_id=gpt-5.4 canonical=https://aistackregistry.com/snapshots/2026-04-15/models/openai/gpt-5.4/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/openai/gpt-5.4/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/openai/gpt-5.4/recommended_defaults.json
- provider=xai models=2 canonical=https://aistackregistry.com/snapshots/2026-04-15/models/xai/index.json browse_markdown=https://aistackregistry.com/snapshots/2026-04-15/models/xai/index.md browse_text=https://aistackregistry.com/snapshots/2026-04-15/models/xai/index.txt
- provider=xai model_id=grok-4-1-fast-non-reasoning canonical=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-non-reasoning/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-non-reasoning/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-non-reasoning/recommended_defaults.json
- provider=xai model_id=grok-4-1-fast-reasoning canonical=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-reasoning/model.json spec=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-reasoning/spec.json defaults=https://aistackregistry.com/snapshots/2026-04-15/models/xai/grok-4-1-fast-reasoning/recommended_defaults.json

Notes
- Start from this snapshot-local index JSON and follow returned URLs directly.
- Browse models via markdown/text variants when a human needs the full catalog without JSON parsing.