Marathon Playground is live.
Interact with your favorite models and submit AI workloads through a sleek, built-in UI. No API keys to wire up, no external tools required.
Pick a model. Pick a completion window. Longer windows cost less: save up to ~65% at the longest window.
Your signup credit is meant for building, so we're protecting it.
Automated accounts were draining the free credit pool at scale. We've reset balances and added a one-click reclaim, keeping that credit with developers who are actually running jobs.
Open your dashboard and hit "Reclaim your credits." Your API keys and purchased credit are untouched.
Model="kimi-k3"
@Kimi_Moonshot K3 is live on Marathon.
Same OpenAI-compatible API, 1M context, and all four windows from the start: now, soon, later, anytime.
If your code already talks to Marathon, you are one line away.