How to Get a Free ai21-labs API Key (2026)
0 free models available — credit card may be required. Get your ai21-labs API key → Test free models →
ai21-labs FreeLLM Score
All Free ai21-labs Models — Context Windows & Rate Limits
| Model | Context | Max Output | Modality | Rate Limit | Released | Status |
|---|
What is ai21-labs?
Jamba models with 256K context — 200 RPM, 10 RPS free tier.
AI21 Labs provides free API access to its Jamba family of models (Large 1.7 and Mini 2), offering a generous 256K context window — among the widest of any free tier — and 200 RPM / 10 RPS rate limits. The API uses AI21's proprietary format (not OpenAI-compatible by default), and no credit card is required.
- 256K context window on all free models
- 200 RPM, 10 RPS — generous rate limits
- Jamba Large 1.7 + Jamba Mini 2
- No credit card required
API Compatibility: AI21 REST API (not OpenAI-compatible by default)
How to Get a ai21-labs API Key
- 1 Sign up at studio.ai21.com Email or Google/GitHub login. No credit card.
- 2 Go to Account → API Keys
- 3 Create a new API key
- 4 Choose a model Jamba Large 1.7 for complex tasks. Jamba Mini 2 for speed.
- 5 Configure client Base URL: https://api.ai21.com/studio/v1. Uses AI21's own API format, not OpenAI-compatible by default.
ai21-labs Free Tier Limits & Pricing
ai21-labs API Setup Tutorial & Tools
ai21-labs is fully compatible with popular AI coding assistants like Cursor, Claude Code, and more. To see step-by-step API configuration instructions for your favorite tool, please visit our Global Configuration Guide →
Use Cases
What ai21-labs's free models are best for, based on aggregated model capabilities:
Limitations & Caveats
- Not OpenAI-compatible by default — requires adapter layer
- Limited model selection (2 models)
- Smaller provider vs Groq/OpenRouter ecosystem
Frequently Asked Questions
What makes Jamba models different from Llama or Qwen?
Jamba uses a hybrid Mamba-Transformer architecture that reduces memory usage for long-context tasks. The 256K context window is 2-8× larger than most free tier models, making it excellent for document analysis and long conversations.
Is the AI21 API compatible with OpenAI SDK?
Not by default — AI21 uses its own REST API format. You'll need to use the AI21 SDK or an adapter library. Some community projects provide OpenAI-compatible wrappers.
What's the difference between Jamba Large 1.7 and Jamba Mini 2?
Jamba Large 1.7 is the full-size model for complex tasks. Jamba Mini 2 is a distilled, faster version suitable for simpler use cases. Both share the 256K context window and free tier limits.