LLM Models Overview - Unifically

Unifically provides access to leading language models from Cursor, OpenAI, and Anthropic through three compatible API formats. Every model listed below supports all three endpoints.

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

Use whichever API format fits your existing codebase. All three endpoints accept the same model IDs and return provider-compatible response formats.

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
`anthropic/claude-fable-5`	Anthropic	Claude Fable 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

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.

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