Available Models

The Zihin API supports 30+ models from 5 providers.

Providers

Provider	Models	Best For
OpenAI	GPT-5, GPT-4.1	General purpose, code
Anthropic	Claude Opus 4.5, Sonnet 4.5	Analysis, writing
Google	Gemini 2.5 Pro, Flash	Multimodal, speed
Grok	Grok 4.1, Grok Code	Real-time, code
OpenRouter	All providers	Flexibility

Model Tiers

Tier	Description	Cost
flagship	Best quality, highest capability	$$$
standard	Balanced quality and cost	$$
economical	Fast and cost-effective	$

OpenAI Models

Model	Context	Best For
gpt-5	128K	Complex reasoning
gpt-5-mini	128K	Balanced performance
gpt-4.1	128K	General tasks
gpt-4.1-mini	128K	Fast responses

Anthropic Models

Model	Context	Best For
claude-opus-4-5-20250514	200K	Deep analysis
claude-sonnet-4-5-20250514	200K	Balanced tasks
claude-3-haiku-20240307	200K	Fast, economical

Google Models

Model	Context	Best For
gemini-2.5-pro	1M	Long context
gemini-2.5-flash	1M	Speed

Grok Models

Model	Context	Best For
grok-4-1-fast-reasoning	2M	Code, real-time
grok-code-fast	128K	Code generation

Model Selection

Specify a Model

{
  "query": "Write a Python function",
  "model": "gpt-4.1",
  "provider": "openai"
}

Auto-Routing

Let the system choose the best model:

{
  "query": "Write a Python function",
  "model": "auto"
}

See Auto-Routing for details.

List Models API

Get all available models:

curl https://llm.zihin.ai/api/llm/models

Response:

{
  "success": true,
  "count": 30,
  "models": [
    {
      "id": "anthropic.claude-3-haiku-20240307",
      "name": "Claude 3 Haiku",
      "provider": "anthropic",
      "tier": "economical",
      "context": "200000",
      "pricing": {
        "input": 0.25,
        "output": 1.25
      },
      "capabilities": ["summarization", "classification"]
    }
  ]
}