Did you give Qwen3.8-27B-FP8 a try?

I haven’t, it seems like I can’t do this with my current Vulkan setup, but I’ll do some exploration.

I’m also waiting for the nixos support for glm 5.3 flash

Hey, thanks for the reply, the speed is actually pretty good!

So it’s running on llama.cpp (llama-server) b10408, Vulkan/RADV, behind llama-swap.

Your questions made me realize i also had a mismatch in my pi model config, the contextWindow and maxTokens had drifted apart pretty significantly so I just fixed that now.

/etc/nixos/configuration.nix

  services.llama-swap = {
    enable = true;
    package = pkgs.llama-swap;
    listenAddress = "0.0.0.0";
    port = 8080;
    openFirewall = true;

    settings = {
      # 63 GB off NVMe cold is slow. The default 120s will time out.
      healthCheckTimeout = 600;
      logLevel = "info";

      models = {
        "glm-flash" = {
          # Keep "local" as an alias so existing clients keep working
          # without touching their base URL or model name.
          aliases = [ "local" "fast" ];
          ttl = 1800;
          cmd = ''
            ${lib.getExe' pkgs.llama-cpp-vulkan "llama-server"}
            --port ''${PORT}
            -m /srv/llm/models/GLM-4.7-Flash-Q8_0.gguf
            -ngl 999 --flash-attn on -c 131072 -np 1
            --jinja --no-webui
            --reasoning-format auto --reasoning-preserve
            --temp 1.0 --top-p 0.95 --repeat-penalty 1.0
            --cors-origins "http://optimus.local:8080,http://localhost:8080/"
          '';
        };

        "gpt-oss-120b" = {
          aliases = [ "smart" ];
          ttl = 1800;
          cmd = ''
            ${lib.getExe' pkgs.llama-cpp-vulkan "llama-server"}
            --port ''${PORT}
            -m /srv/llm/models/gpt-oss-120b/gpt-oss-120b-MXFP4.gguf
            -ngl 999 --flash-attn on -c 65536 -np 1
            --jinja --no-webui --reasoning-format auto
            --temp 1.0 --top-p 1.0 --top-k 0 --min-p 0.0
            --cors-origins "http://optimus.local:8080,http://localhost:8080/"
          '';
        };
      };
    };
  };

~/.pi/agent/models.json (fixed)

{
  "providers": {
    "optimus": {
      "baseUrl": "http://localhost:8080/v1",
      "api": "openai-completions",
      "apiKey": "ollama",
      "models": [
        {
          "id": "local",
          "name": "GLM-4.7-Flash Q8_0 (optimus)",
          "aliases": ["fast", "glm-flash"],
          "reasoning": true,
          "contextWindow": 131072,
          "maxTokens": 32768,
          "cost": { "input": 0, "output": 0, "cacheRead": 0, "cacheWrite": 0 }
        },
        {
          "id": "smart",
          "name": "GPT-OSS-120B (optimus)",
          "aliases": ["gpt-oss-120b", "oss"],
          "reasoning": true,
          "contextWindow": 65536,
          "maxTokens": 16384,
          "cost": { "input": 0, "output": 0, "cacheRead": 0, "cacheWrite": 0 }
        }
      ]
    }
  }
}