What's free
$10 trial credit, valid 3 months
Rate limits
Jamba Large/Mini: 10 RPS / 200 RPM by default
The catch
Card not required for the trial credit itself, required once it expires
Quickstart — chat completions
from openai import OpenAI
client = OpenAI(base_url="https://api.ai21.com/studio/v1", api_key="<YOUR_FREE_API_KEY>")
resp = client.chat.completions.create(
model="<a-free-model>",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)…or with curl:
curl https://api.ai21.com/studio/v1/chat/completions \
-H "Authorization: Bearer $API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"<a-free-model>","messages":[{"role":"user","content":"Hello!"}]}'Appears in
Change history
How this free tier has changed since we started tracking it (2026-07-30) — generated from the git history of providers.json.
- 2026-08-14 Updated OpenAI compatibility
- 2026-07-30 Added to the hub