Models & Providers

Frontman supports multiple AI providers. The available models depend on your provider and how you authenticate. See API Keys & Providers for setup instructions.

Provider overview

Provider	Auth methods	Models
OpenRouter	API key, env variable, free tier	GPT-5.x, Claude family, Gemini, Kimi, Minimax, and more
Anthropic	OAuth, API key, env variable	Claude Opus 4.6, Sonnet 4.5, Opus 4.5, Haiku 4.5, Sonnet 4, Opus 4
OpenAI (ChatGPT)	OAuth	GPT-5.4, GPT-5.3 Codex, GPT-5.2, GPT-5.1 Codex variants
Google	API key	Gemini 3 Pro/Flash, Gemini 2.5 Pro (via OpenRouter)
xAI	API key	Grok models (via OpenRouter)

OpenRouter

OpenRouter gives access to the widest range of models through a single API key. It’s also the provider behind Frontman’s free tier.

Default model: Gemini 3 Flash Preview Auth: API key, environment variable, or free tier Get a key: openrouter.ai/keys

Full model list (own key)

Model	ID
GPT-5.4 Pro	`openai/gpt-5.4-pro`
GPT-5.4	`openai/gpt-5.4`
GPT-5.3 Codex	`openai/gpt-5.3-codex`
GPT-5.2	`openai/gpt-5.2`
GPT-5.1	`openai/gpt-5.1`
GPT-5	`openai/gpt-5`
GPT-5 mini	`openai/gpt-5-mini`
GPT-5 Chat	`openai/gpt-5-chat`
GPT-4.1	`openai/gpt-4.1`
o3	`openai/o3`
o4-mini	`openai/o4-mini`
Claude Opus 4.6	`anthropic/claude-opus-4.6`
Claude Sonnet 4.5	`anthropic/claude-sonnet-4.5`
Claude Opus 4.5	`anthropic/claude-opus-4.5`
Claude Haiku 4.5	`anthropic/claude-haiku-4.5`
Gemini 3 Pro Preview	`google/gemini-3-pro-preview`
Gemini 3 Flash Preview	`google/gemini-3-flash-preview`
Gemini 2.5 Pro	`google/gemini-2.5-pro`

Free tier models

Available without an API key. Limited to 10 requests per user — no sign-up required.

Model	ID
Gemini 3 Flash	`google/gemini-3-flash-preview`
Claude Haiku 4.5	`anthropic/claude-haiku-4.5`
Kimi K2.5	`moonshotai/kimi-k2.5`
Minimax M2.5	`minimax/minimax-m2.5`

Anthropic

Direct access to Claude models via API key, environment variable, or OAuth with your Claude Pro/Max subscription.

Default model: Claude Sonnet 4.5 Auth: OAuth, API key, environment variable Get a key: console.anthropic.com/settings/keys

Model	ID
Claude Opus 4.6	`claude-opus-4-6`
Claude Sonnet 4.5	`claude-sonnet-4-5`
Claude Opus 4.5	`claude-opus-4-5`
Claude Haiku 4.5	`claude-haiku-4-5`
Claude Sonnet 4	`claude-sonnet-4-20250514`
Claude Opus 4	`claude-opus-4-20250514`

OpenAI (ChatGPT)

Access GPT models by connecting your ChatGPT Pro/Plus subscription via OAuth.

Default model: GPT-5.4 Auth: OAuth only

Model	ID
GPT-5.4	`gpt-5.4`
GPT-5.3 Codex	`gpt-5.3-codex`
GPT-5.2 Codex	`gpt-5.2-codex`
GPT-5.2	`gpt-5.2`
GPT-5.1 Codex Max	`gpt-5.1-codex-max`
GPT-5.1 Codex Mini	`gpt-5.1-codex-mini`

Google

Google Gemini models are available through OpenRouter with an OpenRouter API key. You can also use a Google API key directly.

Auth: API key Get a key: aistudio.google.com/apikey

Google models available through OpenRouter are listed in the OpenRouter section above.

xAI

Grok models are available through OpenRouter with an OpenRouter API key. You can also use an xAI API key directly.

Auth: API key Get a key: console.x.ai

How defaults are chosen

When multiple providers are available, Frontman picks the default model from the highest-priority provider:

OpenAI (priority 10)
Anthropic (priority 20)
OpenRouter (priority 30)
Google (priority 40)
xAI (priority 50)

For example, if you have both an Anthropic API key and an OpenRouter key, Frontman defaults to Claude Sonnet 4.5 (Anthropic). You can always switch models from the dropdown in the chat header.

Tiers

Each provider has a full tier (all models, available with your own key or OAuth) and some have a free tier (limited models, using Frontman’s built-in server key):

Full — Own key or OAuth → access to all models listed above
Free — No key needed → limited to the free tier models (OpenRouter only)