language-models

Model listing and resolution for LLM providers. Fetches models from OpenRouter and resolves aliases to full model IDs.

Quick Start

import { resolve, list, search } from 'language-models'

// Resolve aliases to full model IDs
resolve('opus')        // 'anthropic/claude-opus-4.5'
resolve('gpt-4o')      // 'openai/gpt-4o'
resolve('llama-70b')   // 'meta-llama/llama-3.3-70b-instruct'
resolve('mistral')     // 'mistralai/mistral-large-2411'

// List all available models
const models = list()

// Search models
const claudeModels = search('claude')

API

`resolve(input: string): string`

Resolve an alias or partial name to a full model ID.

resolve('opus')                      // 'anthropic/claude-opus-4.5'
resolve('sonnet')                    // 'anthropic/claude-sonnet-4.5'
resolve('gpt')                       // 'openai/gpt-4o'
resolve('llama')                     // 'meta-llama/llama-4-maverick'
resolve('anthropic/claude-opus-4.5') // 'anthropic/claude-opus-4.5' (pass-through)

`list(): ModelInfo[]`

List all available models from OpenRouter.

`get(id: string): ModelInfo | undefined`

Get a model by exact ID.

`search(query: string): ModelInfo[]`

Search models by ID or name.

Available Aliases

Alias	Model ID
`opus`	anthropic/claude-opus-4.5
`sonnet`	anthropic/claude-sonnet-4.5
`haiku`	anthropic/claude-haiku-4.5
`claude`	anthropic/claude-sonnet-4.5
`gpt`, `gpt-4o`, `4o`	openai/gpt-4o
`o1`, `o3`, `o3-mini`	openai/o1, openai/o3, openai/o3-mini
`gemini`, `flash`	google/gemini-2.5-flash
`gemini-pro`	google/gemini-2.5-pro
`llama`, `llama-4`	meta-llama/llama-4-maverick
`llama-70b`	meta-llama/llama-3.3-70b-instruct
`mistral`	mistralai/mistral-large-2411
`codestral`	mistralai/codestral-2501
`deepseek`	deepseek/deepseek-chat
`r1`	deepseek/deepseek-r1
`qwen`	qwen/qwen3-235b-a22b
`grok`	x-ai/grok-3
`sonar`	perplexity/sonar-pro

Updating Models

Fetch the latest models from OpenRouter:

pnpm fetch-models

This updates data/models.json with all available models.