LLM Perks

K2 Horizon

Free right now Small New
Long context

K2 Horizon is a language model. It is currently free at 1 provider with up to 524K tokens of context.

Context
524K tokens
Type
Text
Free since
September 23, 2026

Where to use K2 Horizon for free

Each row is a separate free endpoint with its own limits.

ProviderContextLimitCard
UnoRouter
k2-horizon:free
524K No-card free models use shared capacity and per-model limits; availability can change. No Open

Quick start

curl https://api.unorouter.com/v1/chat/completions \
  -H "Authorization: Bearer $UNOROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "k2-horizon:free",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Example for UnoRouter. Any OpenAI-compatible client works: Cursor, Cline, OpenCode, Open WebUI.

Benchmarks

This model is not on the Artificial Analysis leaderboard yet. We do not publish our own estimates.

Similar free models

FAQ

Is K2 Horizon free?

Yes. As of September 26, 2026, K2 Horizon is free at UnoRouter. Each provider has its own limits — see the table above.

What is the context window of K2 Horizon?

The largest context among free routes is 524,288 tokens. Some providers cap it lower.

How do I call K2 Horizon via API?

Use any OpenAI-compatible client with base URL https://api.unorouter.com/v1, model ID k2-horizon:free, and a UnoRouter key.