What's free
$100/month of Serverless Inference credits on the Free plan (default spending cap; offer for a limited time)
Rate limits
No RPM/TPM published; default cap of $100/month on the Free tier; concurrency limits per project/user
The catch
Serverless Inference credits come with Free, Pro and Academic plans for a limited time; when credits run out, Free accounts must activate pay-as-you-go on the Billing tab or upgrade. OpenAI-compatible endpoint at api.inference.wandb.ai/v1 with any W&B API key.
Free models · sample
deepseek-ai/DeepSeek-V4-Flashmeta-llama/Llama-3.3-70B-Instructmeta-llama/Llama-3.1-8B-InstructMiniMaxAI/MiniMax-M3openai/gpt-oss-120bopenai/gpt-oss-20bzai-org/GLM-5.2google/gemma-4-31B-itnvidia/NVIDIA-Nemotron-3-Ultra-550B-A55BA sample of models reachable on the free tier — the live catalog changes. Pull the current set with GET https://api.inference.wandb.ai/v1/models.
Quickstart — chat completions
from openai import OpenAI
client = OpenAI(base_url="https://api.inference.wandb.ai/v1", api_key="<YOUR_FREE_API_KEY>")
resp = client.chat.completions.create(
model="deepseek-ai/DeepSeek-V4-Flash",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)…or with curl:
curl https://api.inference.wandb.ai/v1/chat/completions \
-H "Authorization: Bearer $API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"deepseek-ai/DeepSeek-V4-Flash","messages":[{"role":"user","content":"Hello!"}]}'Appears in
Change history
How this free tier has changed since we started tracking it (2026-08-14) — generated from the git history of providers.json.
- 2026-08-14 Added to the hub