Available Models

The Zihin API supports 30+ models from 5 providers. Models are managed dynamically and can be updated without code changes.

Providers

Provider	Models	Best For
OpenAI	GPT-4.1, GPT-4.1-mini, GPT-4.1-nano	General purpose, code
Anthropic	Claude Opus 4.6, Sonnet 4.5, Haiku 4.5	Analysis, writing, reasoning
Google	Gemini 2.5 Pro, Gemini 2.5 Flash	Multimodal, long context, speed
Grok	Grok 3, Grok 3 Mini	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-4.1	1M	Complex reasoning, code
gpt-4.1-mini	1M	Balanced performance
gpt-4.1-nano	1M	Fast, economical

Anthropic Models

Model	Context	Best For
claude-opus-4-6	200K	Deep analysis, complex tasks
claude-sonnet-4-5-20250929	200K	Balanced tasks, code
claude-haiku-4-5-20251001	200K	Fast, economical

Google Models

Model	Context	Best For
gemini-2.5-pro	1M	Long context, multimodal
gemini-2.5-flash	1M	Speed, cost efficiency

Grok Models

Model	Context	Best For
grok-3	131K	General purpose
grok-3-mini	131K	Fast, economical

Selecting a Model

Specify Directly

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

Auto-Routing

Let Zihin choose the best model:

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

See Auto-Routing for details.

List Models API

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

{
  "success": true,
  "count": 30,
  "models": [
    {
      "id": "anthropic.claude-haiku-4-5-20251001",
      "name": "Claude Haiku 4.5",
      "provider": "anthropic",
      "tier": "economical",
      "context": "200000",
      "pricing": { "input": 0.80, "output": 4.00 },
      "capabilities": ["summarization", "classification", "code"]
    }
  ]
}