diff --git a/fern/apis/api/openapi.json b/fern/apis/api/openapi.json
index da1a57f16..260d27ff0 100644
--- a/fern/apis/api/openapi.json
+++ b/fern/apis/api/openapi.json
@@ -21275,6 +21275,35 @@
               "gpt-3.5-turbo-1106",
               "gpt-3.5-turbo-16k",
               "gpt-3.5-turbo-0613",
+              "gpt-5.6-luna:westus3",
+              "gpt-5.6-terra:westus3",
+              "gpt-5.6-sol:westus3",
+              "gpt-5.4:eastus2",
+              "gpt-5.4:swedencentral",
+              "gpt-5.4-mini:eastus2",
+              "gpt-5.4-mini:swedencentral",
+              "gpt-5.4-nano:eastus2",
+              "gpt-5.4-nano:swedencentral",
+              "gpt-5.2:eastus2",
+              "gpt-5.2:swedencentral",
+              "gpt-5.1:eastus2",
+              "gpt-5.1:swedencentral",
+              "gpt-5:eastus2",
+              "gpt-5:swedencentral",
+              "gpt-5:canadaeast",
+              "gpt-5:eastus",
+              "gpt-5:westeurope",
+              "gpt-5:germanywestcentral",
+              "gpt-5:polandcentral",
+              "gpt-5:spaincentral",
+              "gpt-5-mini:eastus2",
+              "gpt-5-mini:swedencentral",
+              "gpt-5-mini:westeurope",
+              "gpt-5-mini:germanywestcentral",
+              "gpt-5-mini:polandcentral",
+              "gpt-5-mini:spaincentral",
+              "gpt-5-nano:eastus2",
+              "gpt-5-nano:swedencentral",
               "gpt-4.1-2025-04-14:westus",
               "gpt-4.1-2025-04-14:eastus2",
               "gpt-4.1-2025-04-14:eastus",
@@ -21414,6 +21443,35 @@
                 "gpt-3.5-turbo-1106",
                 "gpt-3.5-turbo-16k",
                 "gpt-3.5-turbo-0613",
+                "gpt-5.6-luna:westus3",
+                "gpt-5.6-terra:westus3",
+                "gpt-5.6-sol:westus3",
+                "gpt-5.4:eastus2",
+                "gpt-5.4:swedencentral",
+                "gpt-5.4-mini:eastus2",
+                "gpt-5.4-mini:swedencentral",
+                "gpt-5.4-nano:eastus2",
+                "gpt-5.4-nano:swedencentral",
+                "gpt-5.2:eastus2",
+                "gpt-5.2:swedencentral",
+                "gpt-5.1:eastus2",
+                "gpt-5.1:swedencentral",
+                "gpt-5:eastus2",
+                "gpt-5:swedencentral",
+                "gpt-5:canadaeast",
+                "gpt-5:eastus",
+                "gpt-5:westeurope",
+                "gpt-5:germanywestcentral",
+                "gpt-5:polandcentral",
+                "gpt-5:spaincentral",
+                "gpt-5-mini:eastus2",
+                "gpt-5-mini:swedencentral",
+                "gpt-5-mini:westeurope",
+                "gpt-5-mini:germanywestcentral",
+                "gpt-5-mini:polandcentral",
+                "gpt-5-mini:spaincentral",
+                "gpt-5-nano:eastus2",
+                "gpt-5-nano:swedencentral",
                 "gpt-4.1-2025-04-14:westus",
                 "gpt-4.1-2025-04-14:eastus2",
                 "gpt-4.1-2025-04-14:eastus",
@@ -22157,6 +22215,35 @@
               "gpt-3.5-turbo-1106",
               "gpt-3.5-turbo-16k",
               "gpt-3.5-turbo-0613",
+              "gpt-5.6-luna:westus3",
+              "gpt-5.6-terra:westus3",
+              "gpt-5.6-sol:westus3",
+              "gpt-5.4:eastus2",
+              "gpt-5.4:swedencentral",
+              "gpt-5.4-mini:eastus2",
+              "gpt-5.4-mini:swedencentral",
+              "gpt-5.4-nano:eastus2",
+              "gpt-5.4-nano:swedencentral",
+              "gpt-5.2:eastus2",
+              "gpt-5.2:swedencentral",
+              "gpt-5.1:eastus2",
+              "gpt-5.1:swedencentral",
+              "gpt-5:eastus2",
+              "gpt-5:swedencentral",
+              "gpt-5:canadaeast",
+              "gpt-5:eastus",
+              "gpt-5:westeurope",
+              "gpt-5:germanywestcentral",
+              "gpt-5:polandcentral",
+              "gpt-5:spaincentral",
+              "gpt-5-mini:eastus2",
+              "gpt-5-mini:swedencentral",
+              "gpt-5-mini:westeurope",
+              "gpt-5-mini:germanywestcentral",
+              "gpt-5-mini:polandcentral",
+              "gpt-5-mini:spaincentral",
+              "gpt-5-nano:eastus2",
+              "gpt-5-nano:swedencentral",
               "gpt-4.1-2025-04-14:westus",
               "gpt-4.1-2025-04-14:eastus2",
               "gpt-4.1-2025-04-14:eastus",
@@ -31733,6 +31820,9 @@
           "models": {
             "type": "array",
             "enum": [
+              "gpt-5.6-luna-2026-07-09",
+              "gpt-5.6-terra-2026-07-09",
+              "gpt-5.6-sol-2026-07-09",
               "gpt-5.4",
               "gpt-5.4-mini",
               "gpt-5.4-nano",
@@ -31767,6 +31857,9 @@
             "items": {
               "type": "string",
               "enum": [
+                "gpt-5.6-luna-2026-07-09",
+                "gpt-5.6-terra-2026-07-09",
+                "gpt-5.6-sol-2026-07-09",
                 "gpt-5.4",
                 "gpt-5.4-mini",
                 "gpt-5.4-nano",
@@ -63255,6 +63348,35 @@
               "gpt-3.5-turbo-1106",
               "gpt-3.5-turbo-16k",
               "gpt-3.5-turbo-0613",
+              "gpt-5.6-luna:westus3",
+              "gpt-5.6-terra:westus3",
+              "gpt-5.6-sol:westus3",
+              "gpt-5.4:eastus2",
+              "gpt-5.4:swedencentral",
+              "gpt-5.4-mini:eastus2",
+              "gpt-5.4-mini:swedencentral",
+              "gpt-5.4-nano:eastus2",
+              "gpt-5.4-nano:swedencentral",
+              "gpt-5.2:eastus2",
+              "gpt-5.2:swedencentral",
+              "gpt-5.1:eastus2",
+              "gpt-5.1:swedencentral",
+              "gpt-5:eastus2",
+              "gpt-5:swedencentral",
+              "gpt-5:canadaeast",
+              "gpt-5:eastus",
+              "gpt-5:westeurope",
+              "gpt-5:germanywestcentral",
+              "gpt-5:polandcentral",
+              "gpt-5:spaincentral",
+              "gpt-5-mini:eastus2",
+              "gpt-5-mini:swedencentral",
+              "gpt-5-mini:westeurope",
+              "gpt-5-mini:germanywestcentral",
+              "gpt-5-mini:polandcentral",
+              "gpt-5-mini:spaincentral",
+              "gpt-5-nano:eastus2",
+              "gpt-5-nano:swedencentral",
               "gpt-4.1-2025-04-14:westus",
               "gpt-4.1-2025-04-14:eastus2",
               "gpt-4.1-2025-04-14:eastus",
@@ -65647,6 +65769,9 @@
           "models": {
             "type": "array",
             "enum": [
+              "gpt-5.6-luna-2026-07-09",
+              "gpt-5.6-terra-2026-07-09",
+              "gpt-5.6-sol-2026-07-09",
               "gpt-5.4",
               "gpt-5.4-mini",
               "gpt-5.4-nano",
@@ -65681,6 +65806,9 @@
             "items": {
               "type": "string",
               "enum": [
+                "gpt-5.6-luna-2026-07-09",
+                "gpt-5.6-terra-2026-07-09",
+                "gpt-5.6-sol-2026-07-09",
                 "gpt-5.4",
                 "gpt-5.4-mini",
                 "gpt-5.4-nano",
@@ -69201,6 +69329,9 @@
           "models": {
             "type": "array",
             "enum": [
+              "gpt-5.6-luna-2026-07-09",
+              "gpt-5.6-terra-2026-07-09",
+              "gpt-5.6-sol-2026-07-09",
               "gpt-5.4",
               "gpt-5.4-mini",
               "gpt-5.4-nano",
@@ -69235,6 +69366,9 @@
             "items": {
               "type": "string",
               "enum": [
+                "gpt-5.6-luna-2026-07-09",
+                "gpt-5.6-terra-2026-07-09",
+                "gpt-5.6-sol-2026-07-09",
                 "gpt-5.4",
                 "gpt-5.4-mini",
                 "gpt-5.4-nano",