| title | Models Reference |
|---|
This page lists models that expose structured output, reasoning, text
verbosity, tokenization modality support, and built-in Anthropic web tools
(web_search / web_fetch) where available. Model names prefer aliases where
available; otherwise the table shows the minimal model string (including
provider prefix when required). The provider column reflects the default
provider used by fast-agent (models may become available with multiple
providers in the future).
Anthropic-on-Vertex is exposed as a separate provider using model strings such
as anthropic-vertex.claude-sonnet-4-6. With google.vertex_ai.enabled, the
native Google provider can also pass Vertex partner model ids such as
google.claude-sonnet-4-6 through unchanged. The table below still shows the
default provider for each base model id; Vertex-specific routes are documented
on LLM Providers.
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