AI Recommendation
Should you use Intern-S1?
Intern-S1 is listed for chat workloads and supports a 8K context window.
Use it when ModelScope's free tier is enough for evaluation, demos, or light production traffic.
Intern-S1 Free API on ModelScope
Free API Verified Catalog profile Profile provider catalog metadata
Intern-S1 is available through ModelScope with 8K context and OpenAI Chat Completions + OpenAI Responses API access.
Free APIOpenAI compatible
API Details
Copy-ready connection details
Base URL
https://api-inference.modelscope.cn/v1 Model ID
Shanghai_AI_Laboratory/Intern-S1 API format OpenAI Chat Completions + OpenAI Responses
Technical Details
Intern-S1 specifications
Context window 8K
Max output 4K
Status Online
Last updated Jun 29, 2026
Free listing since Jun 29, 2026
Input text
Output text
Best for
- Chat
Strengths & Weaknesses
Strengths
- Live API verification available
Watch outs
- Vision support is not listed
- Tool calling is not confirmed
Availability
Intern-S1 availability by provider
We only found this Intern-S1 listing on ModelScope in the current catalog. Use the related models section for nearby alternatives.
| Provider | Model listing | Access | Context | API | Limits |
|---|---|---|---|---|---|
| | Shanghai_AI_Laboratory/Intern-S1 | Free tier | 8K | Native | Varies |
Compare
Intern-S1 alternatives to consider
| Model | Provider | Context | Access |
|---|---|---|---|
| Qwen/Qwen3.5-35B-A3B | ModelScope | 131K | Check provider |
| Qwen/Qwen3.5-27B | ModelScope | 131K | Check provider |
| MiniMax-M2.5-highspeed | ModelScope | 205K | Check provider |
| Kimi K2.5 | ModelScope | 262K | Check provider |
| Qwen/Qwen-Image | ModelScope | 131K | Check provider |
Typical Use Cases
Intern-S1 use cases
Chat
Intern-S1 is tagged for chat in this catalog and works with OpenAI-compatible client libraries.
FAQ
Intern-S1 free API FAQ
Is Intern-S1 free to use?
Intern-S1 is listed with free API access on ModelScope, subject to the provider's quota and account policy.
What is the Intern-S1 model ID?
The model ID shown in this catalog is Shanghai_AI_Laboratory/Intern-S1.
What context window does Intern-S1 support?
The listed context window is 8K tokens with up to 4K output tokens.