diff --git a/system-variables.md b/system-variables.md
index 27d4fec816dbc..c965574da83b9 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -4698,6 +4698,210 @@ SHOW WARNINGS;
 - Default value: `OFF`
 - This variable is used to control whether to allow `INSERT`, `REPLACE`, and `UPDATE` statements to operate on the `_tidb_rowid` column. This variable can be used only when you import data using TiDB tools.
 
+### tidb_opt_hash_agg_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_hash_join_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_index_join_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_index_lookup_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_index_merge_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_index_reader_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_index_scan_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_limit_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_merge_join_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_sort_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_stream_agg_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_table_full_scan_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_table_range_scan_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_table_reader_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_table_rowid_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_table_tiflash_scan_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
+### tidb_opt_topn_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
+
+> **Warning:**
+>
+> This variable is internally used in the [Cost Model](/cost-model.md), and it is **NOT** recommended to modify its value.
+
+- Scope: SESSION | GLOBAL
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
+- Type: Float
+- Range: `[0, 2147483647]`
+- Default value: `1`
+
 ### tidb_optimizer_selectivity_level
 
 - Scope: SESSION