LLM Models Overview - Unifically

Unifically provides access to leading language models from Cursor, OpenAI, Anthropic, Google, xAI, Moonshot AI, and DeepSeek through three compatible API formats. /v1/chat/completions works for every model below except Responses-only models. Support for /v1/messages and /v1/responses depends on the model.

Supported Endpoints

Endpoint	Format	Documentation
`POST /v1/chat/completions`	OpenAI Chat Completions	Chat Completions API
`POST /v1/responses`	OpenAI Responses	Responses API
`POST /v1/messages`	Anthropic Messages	Messages API

All three endpoints accept the same model IDs and return provider-compatible response formats. Start with /v1/chat/completions unless a model page says otherwise. Grok 4.20 Multi-Agent (xai/grok-4.20-multi-agent-0309) is Responses-only, and a model whose upstream does not serve the Responses API returns a 400 invalid_request_error on /v1/responses.

Available Models

Model	Provider	Name
`cursor/composer-2.5`	Cursor	Composer 2.5
`cursor/composer-2.5-fast`	Cursor	Composer 2.5 Fast
`openai/gpt-5.4-mini`	OpenAI	GPT 5.4 Mini
`openai/gpt-5.4-nano`	OpenAI	GPT 5.4 Nano
`openai/gpt-5.4`	OpenAI	GPT 5.4
`openai/gpt-5.5`	OpenAI	GPT 5.5
`openai/gpt-5.6-luna`	OpenAI	GPT 5.6 Luna
`openai/gpt-5.6-terra`	OpenAI	GPT 5.6 Terra
`openai/gpt-5.6-sol`	OpenAI	GPT 5.6 Sol
`openai/gpt-6-astra`	OpenAI	GPT 6 Astra
`openai/gpt-6-sol`	OpenAI	GPT 6 Sol
`openai/gpt-6-luna`	OpenAI	GPT 6 Luna
`openai/gpt-6.1-sol`	OpenAI	GPT 6.1 Sol
`anthropic/claude-sonnet-5-5`	Anthropic	Claude Sonnet 5.5
`anthropic/claude-haiku-5-5`	Anthropic	Claude Haiku 5.5
`anthropic/claude-opus-5-5`	Anthropic	Claude Opus 5.5
`anthropic/claude-fable-5-1`	Anthropic	Claude Fable 5.1
`anthropic/claude-fable-5`	Anthropic	Claude Fable 5
`anthropic/claude-opus-5`	Anthropic	Claude Opus 5
`anthropic/claude-haiku-4-5`	Anthropic	Claude Haiku 4.5
`anthropic/claude-opus-4-5`	Anthropic	Claude Opus 4.5
`anthropic/claude-sonnet-4-5`	Anthropic	Claude Sonnet 4.5
`anthropic/claude-sonnet-5`	Anthropic	Claude Sonnet 5
`anthropic/claude-sonnet-4-6`	Anthropic	Claude Sonnet 4.6
`anthropic/claude-opus-4-6`	Anthropic	Claude Opus 4.6
`anthropic/claude-opus-4-7`	Anthropic	Claude Opus 4.7
`anthropic/claude-opus-4-8`	Anthropic	Claude Opus 4.8
`google/gemini-3.5-flash`	Google	Gemini 3.5 Flash
`google/gemini-3.6-flash`	Google	Gemini 3.6 Flash
`google/gemini-3.7-flash`	Google	Gemini 3.7 Flash
`google/gemini-3.8-flash`	Google	Gemini 3.8 Flash
`google/gemini-4-argon`	Google	Gemini 4 Argon
`xai/grok-4.5`	xAI	Grok 4.5
`xai/grok-4.6`	xAI	Grok 4.6
`xai/grok-4.7`	xAI	Grok 4.7
`xai/grok-4.3`	xAI	Grok 4.3
`xai/grok-build-0.1`	xAI	Grok Build 0.1
`xai/grok-4.20-0309-reasoning`	xAI	Grok 4.20 Reasoning
`xai/grok-4.20-0309-non-reasoning`	xAI	Grok 4.20 Non-Reasoning
`xai/grok-4.20-multi-agent-0309`	xAI	Grok 4.20 Multi-Agent
`moonshotai/kimi-k3.1-pro`	Moonshot AI	Kimi K3.1 Pro
`moonshotai/kimi-k3.1-pro-highspeed`	Moonshot AI	Kimi K3.1 Pro Highspeed
`moonshotai/kimi-k3`	Moonshot AI	Kimi K3
`deepseek/deepseek-flash`	DeepSeek	DeepSeek V4.1 Flash
`deepseek/deepseek-v4-pro`	DeepSeek	DeepSeek V4 Pro
`deepseek/deepseek-v4-flash`	DeepSeek	DeepSeek V4 Flash

Quick Start

curl -X POST https://api.unifically.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "anthropic/claude-sonnet-4-6",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

Authentication

All LLM endpoints use the same Bearer token authentication as the rest of the Unifically API. See Authentication for details.

Volume discounts are available for almost all models. Reach out at contact@unifically.com to discuss custom pricing.

​Supported Endpoints

​Available Models

​Quick Start

​Authentication

Supported Endpoints

Available Models

Quick Start

Authentication