feat(backend): add Google Gemini 3.8 Flash support

autogpt_platform/backend/backend/data/llm_registry/catalog.py

@@ -585,6 +585,20 @@ def _build_catalog() -> CatalogPayload:
                     output_credits_per_1m=1800.0,
                 ),
             ),
+            CatalogModel(
+                slug="google/gemini-3.8-flash",
+                display_name="Gemini 3.8 Flash",
+                provider="open_router",
+                creator="google",
+                context_window=1048576,
+                max_output_tokens=65536,
+                price_tier=1,
+                cost=CatalogModelCost(
+                    run_credits=3,
+                    input_credits_per_1m=112.5,
+                    output_credits_per_1m=562.5,
+                ),
+            ),
             CatalogModel(
                 slug="gryphe/mythomax-l2-13b",
                 display_name="MythoMax L2 13B",

autogpt_platform/backend/backend/data/llm_registry/catalog_test.py

@@ -198,6 +198,24 @@ def test_claude_fable_5_1_bills_at_authored_rates():
     assert fable_entry.context_window == 200000
 
 
+def test_gemini_3_8_flash_bills_at_authored_rates():
+    """Gemini 3.8 Flash (OpenRouter, Google intro list price $0.75/$3.75
+    per 1M through 2026-12-31) — flat tier and per-1M projections must
+    match the authored catalog entry."""
+    flash = LLMModel("google/gemini-3.8-flash")
+    assert MODEL_COST[flash] == 3
+    assert TOKEN_COST[flash].model_dump() == {
+        "input": 112.5,
+        "output": 562.5,
+        "cache_read": 0.0,
+        "cache_creation": 0.0,
+    }
+    assert MODEL_METADATA[flash].max_output_tokens == 65536
+    flash_entry = next(m for m in CATALOG.models if m.slug == "google/gemini-3.8-flash")
+    assert flash_entry.price_tier == 1
+    assert flash_entry.context_window == 1048576
+
+
 def test_provider_usd_prices_are_all_or_nothing():
     """A half-authored provider USD price must refuse to construct — it
     would silently underprice against the transport family default."""

autogpt_platform/backend/backend/data/llm_registry/llm_models.py

@@ -199,6 +199,7 @@ def _missing_(cls, value: object) -> "LLMModel | None":
     GEMINI_2_5_FLASH = "google/gemini-2.5-flash"
     GEMINI_2_0_FLASH = "google/gemini-2.0-flash-001"
     GEMINI_3_1_FLASH_LITE_PREVIEW = "google/gemini-3.1-flash-lite-preview"
+    GEMINI_3_8_FLASH = "google/gemini-3.8-flash"
     GEMINI_2_5_FLASH_LITE = "google/gemini-2.5-flash-lite"
     GEMINI_2_0_FLASH_LITE = "google/gemini-2.0-flash-lite-001"
     MISTRAL_LARGE_3 = "mistralai/mistral-large-2512"