Add Claude Opus 5 and Kimi K3 (Fireworks) to model list (#1625)

* Add Claude Opus 5 to model list (anthropic, openrouter)

Adds claude_opus_5 with Anthropic (claude-opus-5) and OpenRouter (anthropic/claude-opus-5) providers, a new CLAUDE_OPUS_5_ANTHROPIC_THINKING_LEVELS constant (low/medium/high/xhigh/max, default high), and moves featured_rank + suggested_for_evals/data_gen from Opus 4.8 to Opus 5.

* Add Kimi K3 Fireworks AI provider (backfill)

Adds accounts/fireworks/models/kimi-k3 to the existing kimi_k3 entry (was OpenRouter-only), mirroring the K2.6 Fireworks config, and corrects the stale "not yet on Fireworks" comment. Still absent from Together AI and SiliconFlow (.cn).

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: tawnymanticore

libs/core/kiln_ai/adapters/ml_model_list.py

@@ -149,6 +149,7 @@ class ModelName(str, Enum):
     claude_sonnet_4_6 = "claude_sonnet_4_6"
     claude_sonnet_4_5 = "claude_sonnet_4_5"
     claude_opus_4 = "claude_opus_4"
+    claude_opus_5 = "claude_opus_5"
     claude_opus_4_1 = "claude_opus_4_1"
     claude_opus_4_5 = "claude_opus_4_5"
     claude_opus_4_6 = "claude_opus_4_6"
@@ -591,6 +592,15 @@ class KilnModel(BaseModel):
     "Max": "max",
 }
 
+CLAUDE_OPUS_5_ANTHROPIC_THINKING_LEVELS = {
+    "Off/None": "none",
+    "Low": "low",
+    "Medium": "medium",
+    "High": "high",
+    "Extra High": "xhigh",
+    "Max": "max",
+}
+
 CLAUDE_FABLE_5_ANTHROPIC_THINKING_LEVELS = {
     "Low": "low",
     "Medium": "medium",
@@ -2366,17 +2376,17 @@ class KilnModel(BaseModel):
             ),
         ],
     ),
-    # Claude Opus 4.8
+    # Claude Opus 5
     KilnModel(
         family=ModelFamily.claude,
-        name=ModelName.claude_opus_4_8,
-        friendly_name="Claude Opus 4.8",
+        name=ModelName.claude_opus_5,
+        friendly_name="Claude Opus 5",
         featured_rank=2,
         editorial_notes="Anthropic's best Claude model. Expensive, but often the best.",
         providers=[
             KilnModelProvider(
                 name=ModelProviderName.openrouter,
-                model_id="anthropic/claude-opus-4.8",
+                model_id="anthropic/claude-opus-5",
                 structured_output_mode=StructuredOutputMode.json_schema,
                 openrouter_reasoning_object=True,
                 available_thinking_levels=CLAUDE_OPENROUTER_THINKING_LEVELS,
@@ -2397,10 +2407,10 @@ class KilnModel(BaseModel):
             ),
             KilnModelProvider(
                 name=ModelProviderName.anthropic,
-                model_id="claude-opus-4-8",
+                model_id="claude-opus-5",
                 structured_output_mode=StructuredOutputMode.json_schema,
                 temp_top_p_exclusive=True,
-                available_thinking_levels=CLAUDE_OPUS_4_8_ANTHROPIC_THINKING_LEVELS,
+                available_thinking_levels=CLAUDE_OPUS_5_ANTHROPIC_THINKING_LEVELS,
                 default_thinking_level="high",
                 anthropic_summarized_thinking=True,
                 suggested_for_evals=True,
@@ -2418,6 +2428,52 @@ class KilnModel(BaseModel):
             ),
         ],
     ),
+    # Claude Opus 4.8
+    KilnModel(
+        family=ModelFamily.claude,
+        name=ModelName.claude_opus_4_8,
+        friendly_name="Claude Opus 4.8",
+        providers=[
+            KilnModelProvider(
+                name=ModelProviderName.openrouter,
+                model_id="anthropic/claude-opus-4.8",
+                structured_output_mode=StructuredOutputMode.json_schema,
+                openrouter_reasoning_object=True,
+                available_thinking_levels=CLAUDE_OPENROUTER_THINKING_LEVELS,
+                default_thinking_level="none",
+                supports_doc_extraction=True,
+                supports_vision=True,
+                multimodal_capable=True,
+                multimodal_requires_pdf_as_image=True,
+                multimodal_mime_types=[
+                    KilnMimeType.PDF,
+                    KilnMimeType.TXT,
+                    KilnMimeType.MD,
+                    KilnMimeType.JPG,
+                    KilnMimeType.PNG,
+                ],
+            ),
+            KilnModelProvider(
+                name=ModelProviderName.anthropic,
+                model_id="claude-opus-4-8",
+                structured_output_mode=StructuredOutputMode.json_schema,
+                temp_top_p_exclusive=True,
+                available_thinking_levels=CLAUDE_OPUS_4_8_ANTHROPIC_THINKING_LEVELS,
+                default_thinking_level="high",
+                anthropic_summarized_thinking=True,
+                supports_doc_extraction=True,
+                supports_vision=True,
+                multimodal_capable=True,
+                multimodal_mime_types=[
+                    KilnMimeType.PDF,
+                    KilnMimeType.TXT,
+                    KilnMimeType.MD,
+                    KilnMimeType.JPG,
+                    KilnMimeType.PNG,
+                ],
+            ),
+        ],
+    ),
     # Claude Opus 4.7
     KilnModel(
         family=ModelFamily.claude,
@@ -8169,9 +8225,24 @@ class KilnModel(BaseModel):
                     KilnMimeType.PNG,
                 ],
             ),
+            KilnModelProvider(
+                name=ModelProviderName.fireworks_ai,
+                model_id="accounts/fireworks/models/kimi-k3",
+                structured_output_mode=StructuredOutputMode.json_schema,
+                supports_data_gen=True,
+                multimodal_capable=True,
+                supports_vision=True,
+                supports_doc_extraction=True,
+                multimodal_requires_pdf_as_image=True,
+                multimodal_mime_types=[
+                    KilnMimeType.PDF,
+                    KilnMimeType.JPG,
+                    KilnMimeType.PNG,
+                ],
+            ),
             # SiliconFlow provider omitted: moonshotai/Kimi-K3 returns HTTP 400
             # "Model does not exist" on the .cn endpoint Kiln uses (it appears live
-            # on the .com site only). Not yet on Fireworks AI or Together AI (K2.6 / K2.7).
+            # on the .com site only). Not yet on Together AI (K2.6 / K2.7).
         ],
     ),
     # Kimi K2.6