diff --git a/lua/ogpt/api.lua b/lua/ogpt/api.lua
index 0b25c93..27594af 100644
--- a/lua/ogpt/api.lua
+++ b/lua/ogpt/api.lua
@@ -17,6 +17,8 @@ function Api.chat_completions(custom_params, cb, should_stop, opts)
   local ctx = {}
   -- add params before conform
   ctx.params = params
+  local _model = params.model
+  params.model = nil
   if stream then
     params = Utils.conform_to_ollama(params)
     local raw_chunks = ""
@@ -30,7 +32,7 @@ function Api.chat_completions(custom_params, cb, should_stop, opts)
         "--silent",
         "--show-error",
         "--no-buffer",
-        Api.CHAT_COMPLETIONS_URL,
+        Utils.update_url_route(Api.CHAT_COMPLETIONS_URL, _model),
         "-H",
         "Content-Type: application/json",
         "-H",
@@ -275,8 +277,8 @@ function Api.setup()
   loadApiHost("OLLAMA_API_HOST", "OLLAMA_API_HOST", "api_host_cmd", function(value)
     Api.OLLAMA_API_HOST = value
     Api.MODELS_URL = ensureUrlProtocol(Api.OLLAMA_API_HOST .. "/api/tags")
-    Api.COMPLETIONS_URL = ensureUrlProtocol(Api.OLLAMA_API_HOST .. "/api/generate")
-    Api.CHAT_COMPLETIONS_URL = ensureUrlProtocol(Api.OLLAMA_API_HOST .. "/api/generate")
+    Api.COMPLETIONS_URL = ensureUrlProtocol(Api.OLLAMA_API_HOST .. "/")
+    Api.CHAT_COMPLETIONS_URL = ensureUrlProtocol(Api.OLLAMA_API_HOST .. "/")
   end, "http://localhost:11434")
 
   loadApiKey("OLLAMA_API_KEY", "OLLAMA_API_KEY", "api_key_cmd", function(value)
diff --git a/lua/ogpt/config.lua b/lua/ogpt/config.lua
index 0eda46a..838b29a 100644
--- a/lua/ogpt/config.lua
+++ b/lua/ogpt/config.lua
@@ -165,16 +165,16 @@ function M.defaults()
     },
 
     api_params = {
-      model = "mistral:7b",
+      model = "mixtral-8-7b-moe-instruct-tgi-predictor-ai-factory",
       temperature = 0.8,
-      top_p = 1,
+      top_p = 0.9,
     },
     api_edit_params = {
       model = "mistral:7b",
       frequency_penalty = 0,
       presence_penalty = 0,
       temperature = 0.5,
-      top_p = 1,
+      top_p = 0.9,
     },
     use_openai_functions_for_edits = false,
     actions = {
diff --git a/lua/ogpt/flows/actions/chat/init.lua b/lua/ogpt/flows/actions/chat/init.lua
index a74d423..dc0ac55 100644
--- a/lua/ogpt/flows/actions/chat/init.lua
+++ b/lua/ogpt/flows/actions/chat/init.lua
@@ -34,8 +34,9 @@ local STRATEGY_QUICK_FIX = "quick_fix"
 function ChatAction:init(opts)
   self.super:init(opts)
   self.params = opts.params or {}
-  self.system = opts.system or ""
-  self.template = opts.template or "{{input}}"
+  self.system = type(opts.system) == "function" and opts.system() or opts.system or ""
+  self.template = type(opts.template) == "function" and opts.template() or opts.template or "{{input}}"
+  -- self.instruction = type(opts.instruction) == "function" and opts.instruction() or opts.instruction or ""
   self.variables = opts.variables or {}
   self.strategy = opts.strategy or STRATEGY_APPEND
   self.ui = opts.ui or {}
@@ -52,7 +53,11 @@ function ChatAction:render_template()
   data = vim.tbl_extend("force", {}, data, self.variables)
   local result = self.template
   for key, value in pairs(data) do
-    result = result:gsub("{{" .. key .. "}}", value)
+    if type(value) == "function" then
+      value = value()
+    end
+    local escaped_value = Utils.escape_pattern(value)
+    result = string.gsub(result, "{{" .. key .. "}}", escaped_value)
   end
   return result
 end
@@ -66,7 +71,7 @@ function ChatAction:get_params()
   table.insert(messages, message)
   return vim.tbl_extend("force", Config.options.api_params, self.params, {
     messages = messages,
-    system = self.system,
+    system = self.system and "" == self.system and nil or self.system,
   })
 end
 
diff --git a/lua/ogpt/utils.lua b/lua/ogpt/utils.lua
index 378d192..d41a538 100644
--- a/lua/ogpt/utils.lua
+++ b/lua/ogpt/utils.lua
@@ -186,15 +186,15 @@ end
 
 function M._conform_to_ollama_api(params)
   local ollama_parameters = {
-    "model",
-    "prompt",
-    "format",
-    "options",
-    "system",
-    "template",
-    "context",
+    -- "model",
+    "inputs",
+    -- "format",
+    "parameters",
+    -- "system",
+    -- "template",
+    -- "context",
     "stream",
-    "raw",
+    -- "raw",
   }
 
   -- https://github.com/jmorganca/ollama/blob/main/docs/api.md#show-model-information
@@ -207,9 +207,9 @@ function M._conform_to_ollama_api(params)
       params[key] = nil
     end
   end
-  local _options = vim.tbl_extend("keep", param_options, params.options or {})
+  local _options = vim.tbl_extend("keep", param_options, params.parameters or {})
   if next(_options) ~= nil then
-    params.options = _options
+    params.parameters = _options
   end
   return params
 end
@@ -218,8 +218,8 @@ function M.conform_to_ollama(params)
   if params.messages then
     local messages = params.messages
     params.messages = nil
-    params.system = params.system or ""
-    params.prompt = params.prompt or ""
+    -- params.system = params.system or ""
+    params.inputs = params.inputs or ""
     for _, message in ipairs(messages) do
       if message.role == "system" then
         params.system = params.system .. "\n" .. message.content .. "\n"
@@ -228,7 +228,7 @@ function M.conform_to_ollama(params)
 
     for _, message in ipairs(messages) do
       if message.role == "user" then
-        params.prompt = params.prompt .. "\n" .. message.content .. "\n"
+        params.inputs = params.inputs .. "\n" .. message.content .. "\n"
       end
     end
   end
@@ -277,4 +277,27 @@ function M.tableToString(tbl, indent)
   return str
 end
 
+function M.update_url_route(url, new_route)
+  -- Extract the base URL parts
+  local base_url_parts = { url:match("^(https?://([^/]*))") }
+  local base_protocol = base_url_parts[1]
+  local base_domain = base_url_parts[2]
+
+  -- Construct the new URL
+  local new_url = base_protocol .. "://" .. new_route .. "." .. base_domain
+
+  -- Preserve any path, query string, or fragment from the original URL
+  local path_and_query = url:match("^https?://[^/]*(/.*)$")
+  if path_and_query then
+    new_url = new_url .. path_and_query
+  end
+
+  return new_url
+end
+
+function M.escape_pattern(text)
+  -- https://stackoverflow.com/a/34953646/4780010
+  return text:gsub("([^%w])", "%%%1")
+end
+
 return M