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Model Aliases

Aliases let you reference models with short, memorable names instead of full model identifiers like claude-sonnet-4-20250514.

Concept​

An alias is a short name that maps to a full model name:

fast   ->  claude-3-5-haiku-latest
smart  ->  claude-sonnet-4-20250514
best   ->  claude-opus-4-20250514

This means you can use fast anywhere you would use claude-3-5-haiku-latest.

Commands​

List Aliases​

View all configured aliases:

viben model aliases list

Output:

Model Aliases:
  fast   -> claude-3-5-haiku-latest
  smart  -> claude-sonnet-4-20250514
  best   -> claude-opus-4-20250514
  gpt    -> gpt-4-turbo

For JSON output:

viben model aliases list --json

Create Alias​

Create a new alias:

viben model aliases create -n <alias> -f <model>

Examples:

# Create speed-focused aliases
viben model aliases create -n fast -f claude-3-5-haiku-latest
viben model aliases create -n quick -f gpt-4o-mini

# Create quality-focused aliases
viben model aliases create -n smart -f claude-sonnet-4-20250514
viben model aliases create -n best -f claude-opus-4-20250514

# Create purpose-specific aliases
viben model aliases create -n code -f claude-sonnet-4-20250514
viben model aliases create -n chat -f claude-3-5-haiku-latest
viben model aliases create -n reasoning -f o1-preview

# Create provider-specific aliases
viben model aliases create -n gpt -f gpt-4-turbo
viben model aliases create -n claude -f claude-sonnet-4-20250514
viben model aliases create -n gemini -f gemini-1.5-pro

Remove Alias​

Remove an existing alias:

viben model aliases remove -n <alias>

Example:

viben model aliases remove -n old-alias

Configuration File​

Aliases are stored in ~/.viben/models.yaml:

# ~/.viben/models.yaml
version: 1

default: claude-sonnet-4-20250514

aliases:
  # Speed-focused
  fast: claude-3-5-haiku-latest
  quick: gpt-4o-mini

  # Quality-focused
  smart: claude-sonnet-4-20250514
  balanced: gpt-4o

  # Maximum capability
  best: claude-opus-4-20250514
  powerful: gpt-4-turbo

  # Purpose-specific
  code: claude-sonnet-4-20250514
  chat: claude-3-5-haiku-latest
  reasoning: o1-preview

  # Provider-specific
  gpt: gpt-4-turbo
  claude: claude-sonnet-4-20250514
  gemini: gemini-1.5-pro

By Performance​

AliasDescriptionExample Model
fastFastest response timeclaude-3-5-haiku-latest
quickQuick responsesgpt-4o-mini
balancedBalanced speed/qualitygpt-4o
smartHigh qualityclaude-sonnet-4-20250514
bestMaximum qualityclaude-opus-4-20250514
powerfulMost capablegpt-4-turbo

By Use Case​

AliasDescriptionExample Model
codeCode generation/reviewclaude-sonnet-4-20250514
chatCasual conversationclaude-3-5-haiku-latest
reasoningComplex reasoningo1-preview
analysisData analysisclaude-opus-4-20250514
creativeCreative writingclaude-opus-4-20250514

By Provider​

AliasDescriptionExample Model
claudeDefault Claude modelclaude-sonnet-4-20250514
gptDefault GPT modelgpt-4-turbo
geminiDefault Gemini modelgemini-1.5-pro
localLocal Ollama modelllama3

Using Aliases​

Once configured, use aliases anywhere you specify a model:

# Set default model using alias
viben model set-default -n fast

# Use in agent configuration
viben agent config -n my-agent set model smart

Updating Aliases​

To update an alias to point to a different model, simply create it again:

# Update 'fast' to point to a different model
viben model aliases create -n fast -f gpt-4o-mini

This will overwrite the existing alias.

Best Practices​

Use Semantic Names​

Choose alias names that describe the use case, not the specific model:

# Good - semantic naming
viben model aliases create -n fast -f claude-3-5-haiku-latest
viben model aliases create -n best -f claude-opus-4-20250514

# Less ideal - model-specific naming
viben model aliases create -n haiku -f claude-3-5-haiku-latest
viben model aliases create -n opus -f claude-opus-4-20250514

Semantic names allow you to swap out the underlying model without changing your workflows.

Standardize Across Team​

If working in a team, agree on a standard set of aliases:

aliases:
  # Team standards
  fast: claude-3-5-haiku-latest    # For quick operations
  default: claude-sonnet-4-20250514 # Default for most tasks
  premium: claude-opus-4-20250514   # When quality matters most

Keep Aliases Minimal​

Too many aliases can be confusing. Stick to a small set of commonly used ones:

# Good - focused set
aliases:
  fast: claude-3-5-haiku-latest
  smart: claude-sonnet-4-20250514
  best: claude-opus-4-20250514

# Less ideal - too many aliases
aliases:
  fast: ...
  quick: ...
  speedy: ...
  rapid: ...
  # etc.

JSON Output​

viben model aliases list --json
{
  "success": true,
  "data": {
    "aliases": {
      "fast": "claude-3-5-haiku-latest",
      "smart": "claude-sonnet-4-20250514",
      "best": "claude-opus-4-20250514",
      "gpt": "gpt-4-turbo"
    }
  }
}

Next Steps​