Key Info

OpenRouter has added Kev 4B, a small open-weight System One model by Jared Palmer, priced at $0.042 per million input tokens with $0 output and 8K context. It uses the same API as Jev, so existing callers can switch by changing the model field.

Highlights

  • Kev 4B accepts state and typed questions, returning typed answers
  • Priced at $0.042/M input tokens, $0 output, 8K context
  • Same API as Jev; switch by setting "model":"jaredpalmer/kev-4b"
  • Built as a LoRA adapter and pointer head on Qwen3.5-4B-Base; weights available on Hugging Face