# Intern S2

> Intern-S2-Preview is InternLM's 35B scientific multimodal foundation model for research agents, multimodal understanding, and scientific workflows. AIHubMix serves it as a free-tier text-and-image chat model with a 262K context window.

**ID**: `intern/intern-s2-free`  
**Creator**: intern  
**Category**: multimodal  
**Context**: 262K tokens  
**Input**: $0  
**Output**: $0  
**Released**: 2026-05-14  
**Web page**: https://anyrouter.dev/model/intern/intern-s2-free

**Input modalities**: text, image  
**Output modalities**: text  

**Tokenizer**: Intern

**Capabilities**: chat, streaming, agentic, coding, vision

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "intern/intern-s2-free",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| aihubmix-byok | $0 | $0 |

## Source

- Upstream docs: https://aihubmix.com/model/intern-s2-free