From 5517e10843b40775d468c2a7a8ce13427b66e338 Mon Sep 17 00:00:00 2001
From: Vladimir Kolchurin <18503099+kolchurinvv@users.noreply.github.com>
Date: Wed, 1 Apr 2026 17:21:50 +0200
Subject: [PATCH 1/3] providers - no top_p n and temperature for -codex gpt
 models

---
 lua/CopilotChat/config/providers.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lua/CopilotChat/config/providers.lua b/lua/CopilotChat/config/providers.lua
index 548f6abd..1a450d11 100644
--- a/lua/CopilotChat/config/providers.lua
+++ b/lua/CopilotChat/config/providers.lua
@@ -278,6 +278,8 @@ end
 ---@return table
 local function prepare_chat_input(inputs, opts)
   local is_o1 = vim.startswith(opts.model.id, 'o1')
+  local regex = vim.regex('codex')
+  local is_codex = regex.match_str(regex, opts.model.id) ~= nil
 
   inputs = vim.tbl_map(function(input)
     local output = {
@@ -324,7 +326,7 @@ local function prepare_chat_input(inputs, opts)
     end, opts.tools)
   end
 
-  if not is_o1 then
+  if not is_o1 and not is_codex then
     out.n = 1
     out.top_p = 1
     out.temperature = opts.temperature

From 80795c048dc0d06590e3a49efe5fea27f333c4a3 Mon Sep 17 00:00:00 2001
From: Tomas Slusny <slusnucky@gmail.com>
Date: Thu, 16 Apr 2026 10:38:38 +0200
Subject: [PATCH 2/3] Update lua/CopilotChat/config/providers.lua

---
 lua/CopilotChat/config/providers.lua | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lua/CopilotChat/config/providers.lua b/lua/CopilotChat/config/providers.lua
index 1a450d11..e8592794 100644
--- a/lua/CopilotChat/config/providers.lua
+++ b/lua/CopilotChat/config/providers.lua
@@ -278,7 +278,6 @@ end
 ---@return table
 local function prepare_chat_input(inputs, opts)
   local is_o1 = vim.startswith(opts.model.id, 'o1')
-  local regex = vim.regex('codex')
   local is_codex = regex.match_str(regex, opts.model.id) ~= nil
 
   inputs = vim.tbl_map(function(input)

From dffe515dd02a56ad2215e90b135357c520f6cbd9 Mon Sep 17 00:00:00 2001
From: Tomas Slusny <slusnucky@gmail.com>
Date: Thu, 16 Apr 2026 10:38:45 +0200
Subject: [PATCH 3/3] Update lua/CopilotChat/config/providers.lua

---
 lua/CopilotChat/config/providers.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lua/CopilotChat/config/providers.lua b/lua/CopilotChat/config/providers.lua
index e8592794..fce20e3f 100644
--- a/lua/CopilotChat/config/providers.lua
+++ b/lua/CopilotChat/config/providers.lua
@@ -278,7 +278,7 @@ end
 ---@return table
 local function prepare_chat_input(inputs, opts)
   local is_o1 = vim.startswith(opts.model.id, 'o1')
-  local is_codex = regex.match_str(regex, opts.model.id) ~= nil
+  local is_codex = opts.model.id:find('codex') ~= nil
 
   inputs = vim.tbl_map(function(input)
     local output = {