Add GPT-5.4 mini and nano support (#140)

Author: PeterDaveHello

app/openai_constants.py

@@ -41,12 +41,16 @@
 GPT_5_2_2025_12_11_MODEL = "gpt-5.2-2025-12-11"
 GPT_5_3_CHAT_LATEST_MODEL = "gpt-5.3-chat-latest"
 GPT_5_4_MODEL = "gpt-5.4"
+GPT_5_4_MINI_MODEL = "gpt-5.4-mini"
+GPT_5_4_NANO_MODEL = "gpt-5.4-nano"
 O3_MODEL = "o3"
 O4_MINI_MODEL = "o4-mini"
 GPT_5_2025_08_07_MODEL = "gpt-5-2025-08-07"
 GPT_5_MINI_2025_08_07_MODEL = "gpt-5-mini-2025-08-07"
 GPT_5_NANO_2025_08_07_MODEL = "gpt-5-nano-2025-08-07"
 GPT_5_4_2026_03_05_MODEL = "gpt-5.4-2026-03-05"
+GPT_5_4_MINI_2026_03_17_MODEL = "gpt-5.4-mini-2026-03-17"
+GPT_5_4_NANO_2026_03_17_MODEL = "gpt-5.4-nano-2026-03-17"
 O3_2025_04_16_MODEL = "o3-2025-04-16"
 O4_MINI_2025_04_16_MODEL = "o4-mini-2025-04-16"
 
@@ -97,6 +101,8 @@
     GPT_5_1_2025_11_13_MODEL: (3, 1),
     GPT_5_2_2025_12_11_MODEL: (3, 1),
     GPT_5_4_2026_03_05_MODEL: (3, 1),
+    GPT_5_4_MINI_2026_03_17_MODEL: (3, 1),
+    GPT_5_4_NANO_2026_03_17_MODEL: (3, 1),
     # Reasoning models (dated)
     O3_2025_04_16_MODEL: (3, 1),
     O4_MINI_2025_04_16_MODEL: (3, 1),
@@ -121,6 +127,8 @@
     GPT_5_1_MODEL: GPT_5_1_2025_11_13_MODEL,
     GPT_5_2_MODEL: GPT_5_2_2025_12_11_MODEL,
     GPT_5_4_MODEL: GPT_5_4_2026_03_05_MODEL,
+    GPT_5_4_MINI_MODEL: GPT_5_4_MINI_2026_03_17_MODEL,
+    GPT_5_4_NANO_MODEL: GPT_5_4_NANO_2026_03_17_MODEL,
     GPT_5_SEARCH_API_MODEL: GPT_5_SEARCH_API_2025_10_14_MODEL,
     O3_MODEL: O3_2025_04_16_MODEL,
     O4_MINI_MODEL: O4_MINI_2025_04_16_MODEL,
@@ -163,6 +171,8 @@
     GPT_5_1_2025_11_13_MODEL: 128000,
     GPT_5_2_2025_12_11_MODEL: 400000,
     GPT_5_4_2026_03_05_MODEL: 272000,
+    GPT_5_4_MINI_2026_03_17_MODEL: 400000,
+    GPT_5_4_NANO_2026_03_17_MODEL: 400000,
     # Reasoning models (dated)
     O3_2025_04_16_MODEL: 128000,
     O4_MINI_2025_04_16_MODEL: 128000,

app/slack_ui.py

@@ -10,6 +10,8 @@
     GPT_4_1_MINI_MODEL,
     GPT_5_3_CHAT_LATEST_MODEL,
     GPT_5_4_MODEL,
+    GPT_5_4_MINI_MODEL,
+    GPT_5_4_NANO_MODEL,
     GPT_5_2_CHAT_LATEST_MODEL,
     GPT_5_2_MODEL,
     GPT_5_1_CHAT_LATEST_MODEL,
@@ -450,6 +452,14 @@ def build_configure_modal(context: BoltContext) -> dict:
             "text": {"type": "plain_text", "text": "GPT-5.4"},
             "value": GPT_5_4_MODEL,
         },
+        {
+            "text": {"type": "plain_text", "text": "GPT-5.4-mini"},
+            "value": GPT_5_4_MINI_MODEL,
+        },
+        {
+            "text": {"type": "plain_text", "text": "GPT-5.4-nano"},
+            "value": GPT_5_4_NANO_MODEL,
+        },
         {
             "text": {"type": "plain_text", "text": "GPT-5.3-chat-latest"},
             "value": GPT_5_3_CHAT_LATEST_MODEL,

tests/model_constants_test.py

@@ -11,7 +11,11 @@
     GPT_5_2_MODEL,
     GPT_5_2_2025_12_11_MODEL,
     GPT_5_4_MODEL,
+    GPT_5_4_MINI_MODEL,
+    GPT_5_4_NANO_MODEL,
     GPT_5_4_2026_03_05_MODEL,
+    GPT_5_4_MINI_2026_03_17_MODEL,
+    GPT_5_4_NANO_2026_03_17_MODEL,
 )
 
 def test_alias_resolution():
@@ -31,6 +35,14 @@ def test_gpt_5_4_alias_resolution():
     """Ensures the GPT-5.4 alias resolves to the dated release."""
     assert resolve_model_alias(GPT_5_4_MODEL) == GPT_5_4_2026_03_05_MODEL
 
+def test_gpt_5_4_mini_alias_resolution():
+    """Ensures the GPT-5.4-mini alias resolves to the dated release."""
+    assert resolve_model_alias(GPT_5_4_MINI_MODEL) == GPT_5_4_MINI_2026_03_17_MODEL
+
+def test_gpt_5_4_nano_alias_resolution():
+    """Ensures the GPT-5.4-nano alias resolves to the dated release."""
+    assert resolve_model_alias(GPT_5_4_NANO_MODEL) == GPT_5_4_NANO_2026_03_17_MODEL
+
 def test_unregistered_model_fails():
     """Tests that resolving an unregistered model raises NotImplementedError."""
     # First, test the resolver

tests/openai_ops_test.py

@@ -163,6 +163,8 @@ def fake_calculate_num_tokens(messages, model=None):  # type: ignore[no-redef]
         ("gpt-5.1-2025-11-13", True),
         ("gpt-5.2-2025-12-11", True),
         ("gpt-5.4", True),
+        ("gpt-5.4-mini", True),
+        ("gpt-5.4-nano", True),
         ("gpt-5-nano", True),
         ("o3", True),
         ("o4-mini", True),
@@ -186,6 +188,8 @@ def test_is_reasoning_heuristics(model, expected):
         ("gpt-5.2-chat-latest", False, 0.55, 11, "U678"),
         (GPT_5_3_CHAT_LATEST_MODEL, False, 0.55, 11, "U789"),
         (GPT_5_4_MODEL, True, 0.55, 11, "U890"),
+        ("gpt-5.4-mini", True, 0.55, 11, "U901"),
+        ("gpt-5.4-nano", True, 0.55, 11, "U902"),
     ],
 )
 def test_sync_tokens_and_sampling_behavior(fake_clients, api_type, model, is_reasoning, temperature, timeout, user):

tests/slack_ui_test.py

@@ -4,6 +4,8 @@
 from app.openai_constants import (
     GPT_5_3_CHAT_LATEST_MODEL,
     GPT_5_4_MODEL,
+    GPT_5_4_MINI_MODEL,
+    GPT_5_4_NANO_MODEL,
 )
 
 
@@ -27,8 +29,10 @@ def test_build_configure_modal_includes_new_models():
     options = modal["blocks"][1]["element"]["options"]
     values = [option["value"] for option in options]
 
-    assert values[:4] == [
+    assert values[:6] == [
         GPT_5_4_MODEL,
+        GPT_5_4_MINI_MODEL,
+        GPT_5_4_NANO_MODEL,
         GPT_5_3_CHAT_LATEST_MODEL,
         "gpt-5.2-chat-latest",
         "gpt-5.2",