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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.

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Supported Endpoints

EndpointFormatDocumentation
POST /v1/chat/completionsOpenAI Chat CompletionsChat Completions API
POST /v1/responsesOpenAI ResponsesResponses API
POST /v1/messagesAnthropic MessagesMessages API
Use whichever API format fits your existing codebase. All three endpoints accept the same model IDs and return provider-compatible response formats.

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Available Models

ModelProviderName
cursor/composer-2.5CursorComposer 2.5
cursor/composer-2.5-fastCursorComposer 2.5 Fast
openai/gpt-5.4-miniOpenAIGPT 5.4 Mini
openai/gpt-5.4-nanoOpenAIGPT 5.4 Nano
openai/gpt-5.4OpenAIGPT 5.4
openai/gpt-5.5OpenAIGPT 5.5
anthropic/claude-sonnet-4-6AnthropicClaude Sonnet 4.6
anthropic/claude-opus-4-6AnthropicClaude Opus 4.6
anthropic/claude-opus-4-7AnthropicClaude Opus 4.7
anthropic/claude-opus-4-8AnthropicClaude Opus 4.8

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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!"}
    ]
  }'

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Authentication

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