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homelabstack/stacks/llm/llama-swap-config.yaml
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# llama-swap model menu for the Hermes backend (single P100, 16GB).
# llama-swap presents every model below via /v1/models and hot-swaps on demand —
# only one fits in VRAM at a time, so selecting a different model triggers a
# brief reload. Default is chosen by Hermes (model.default = gpt-oss-20b).
#
# All four serve 64k context (Hermes' minimum). Args are the validated Pascal
# config: q8_0 KV (q4_0 V-cache is pathological on GP100), flash-attn on,
# --parallel 1 so one sequence gets the full 64k. gpt-oss/gemma4 are natively
# >=128k so no YaRN/override-kv needed.
#
# Excluded: qwen3-30b-a3b-2507 (Q3) — OOMs at 64k in 16GB, so it can't meet
# Hermes' 64k minimum on this GPU.
healthCheckTimeout: 300
logLevel: info
macros:
# --jinja applies each model's embedded chat template (REQUIRED for gpt-oss'
# harmony format, else content comes back empty; harmless/correct for gemma4).
common: "-ngl 99 --parallel 1 --ctx-size 65536 --flash-attn on --cache-type-k q8_0 --cache-type-v q8_0 --jinja"
models:
"gpt-oss-20b":
# MoE ~3.6B active. Fastest prefill (~365 tok/s) -> ~45s cold start on Hermes' 16k prompt.
cmd: >
/app/llama-server --port ${PORT} --host 0.0.0.0
-m /models/gpt-oss-20b-mxfp4.gguf --alias gpt-oss-20b
${common}
"gemma-4-26b-a4b":
# gemma4 MoE, 4B active / 26B total (UD-Q3_K_M). Quality-leaning; ~147 tok/s prefill.
cmd: >
/app/llama-server --port ${PORT} --host 0.0.0.0
-m /models/gemma-4-26B-A4B-it-UD-Q3_K_M.gguf --alias gemma-4-26b-a4b
${common}
"gemma-4-12b":
# Dense 12B (Q4_K_M). ~85 tok/s prefill.
cmd: >
/app/llama-server --port ${PORT} --host 0.0.0.0
-m /models/gemma-4-12b-it-Q4_K_M.gguf --alias gemma-4-12b
${common}
"gemma-4-e4b":
# Small dense ~4B (Q4_K_M). Lots of VRAM headroom; ~173 tok/s prefill.
cmd: >
/app/llama-server --port ${PORT} --host 0.0.0.0
-m /models/gemma-4-E4B-it-Q4_K_M.gguf --alias gemma-4-e4b
${common}