From 22ef7ab070ee96c1af80cc514a5a1530a9d1d695 Mon Sep 17 00:00:00 2001
From: Cesar Garcia <128240629+Chesars@users.noreply.github.com>
Date: Fri, 21 Nov 2025 20:55:25 -0300
Subject: [PATCH] feat: Add support for Gemini 3 Pro Image model (#16938)
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Add gemini-3-pro-image-preview model configuration for Google's new
image generation model (aka "Nano Banana Pro 🍌").

Model details:
- Input: $2.00/1M tokens (text), $0.0011/image
- Output: $12.00/1M tokens (text), $0.134/image (1K/2K)
- Context: 65k input / 32k output tokens
- Capabilities: structured outputs, web search, caching, thinking
- No function calling support
- Available on both Gemini API and Vertex AI

Added variants:
- gemini-3-pro-image-preview (base, uses Vertex AI)
- gemini/gemini-3-pro-image-preview (Gemini API)
- vertex_ai/gemini-3-pro-image-preview (Vertex AI)

Source: https://ai.google.dev/gemini-api/docs/pricing
Fixes: #16925
---
 model_prices_and_context_window.json | 80 ++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index fee5c80fe48..43c9c050308 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -11367,6 +11367,39 @@
         "supports_web_search": true,
         "tpm": 8000000
     },
+    "gemini-3-pro-image-preview": {
+        "input_cost_per_image": 0.0011,
+        "input_cost_per_token": 2e-06,
+        "input_cost_per_token_batches": 1e-06,
+        "litellm_provider": "vertex_ai-language-models",
+        "max_input_tokens": 65536,
+        "max_output_tokens": 32768,
+        "max_tokens": 65536,
+        "mode": "image_generation",
+        "output_cost_per_image": 0.134,
+        "output_cost_per_token": 1.2e-05,
+        "output_cost_per_token_batches": 6e-06,
+        "source": "https://ai.google.dev/gemini-api/docs/pricing",
+        "supported_endpoints": [
+            "/v1/chat/completions",
+            "/v1/completions",
+            "/v1/batch"
+        ],
+        "supported_modalities": [
+            "text",
+            "image"
+        ],
+        "supported_output_modalities": [
+            "text",
+            "image"
+        ],
+        "supports_function_calling": false,
+        "supports_prompt_caching": true,
+        "supports_response_schema": true,
+        "supports_system_messages": true,
+        "supports_vision": true,
+        "supports_web_search": true
+    },
     "gemini-2.5-flash-lite": {
         "cache_read_input_token_cost": 2.5e-08,
         "input_cost_per_audio_token": 5e-07,
@@ -13071,6 +13104,39 @@
         "supports_web_search": true,
         "tpm": 8000000
     },
+    "gemini/gemini-3-pro-image-preview": {
+        "input_cost_per_image": 0.0011,
+        "input_cost_per_token": 2e-06,
+        "input_cost_per_token_batches": 1e-06,
+        "litellm_provider": "gemini",
+        "max_input_tokens": 65536,
+        "max_output_tokens": 32768,
+        "max_tokens": 65536,
+        "mode": "image_generation",
+        "output_cost_per_image": 0.134,
+        "output_cost_per_token": 1.2e-05,
+        "output_cost_per_token_batches": 6e-06,
+        "source": "https://ai.google.dev/gemini-api/docs/pricing",
+        "supported_endpoints": [
+            "/v1/chat/completions",
+            "/v1/completions",
+            "/v1/batch"
+        ],
+        "supported_modalities": [
+            "text",
+            "image"
+        ],
+        "supported_output_modalities": [
+            "text",
+            "image"
+        ],
+        "supports_function_calling": false,
+        "supports_prompt_caching": true,
+        "supports_response_schema": true,
+        "supports_system_messages": true,
+        "supports_vision": true,
+        "supports_web_search": true
+    },
     "gemini/gemini-2.5-flash-lite": {
         "cache_read_input_token_cost": 2.5e-08,
         "input_cost_per_audio_token": 5e-07,
@@ -24557,6 +24623,20 @@
         "output_cost_per_image": 0.039,
         "source": "https://cloud.google.com/vertex-ai/generative-ai/docs/multimodal/image-generation#edit-an-image"
     },
+    "vertex_ai/gemini-3-pro-image-preview": {
+        "input_cost_per_image": 0.0011,
+        "input_cost_per_token": 2e-06,
+        "input_cost_per_token_batches": 1e-06,
+        "litellm_provider": "vertex_ai-language-models",
+        "max_input_tokens": 65536,
+        "max_output_tokens": 32768,
+        "max_tokens": 65536,
+        "mode": "image_generation",
+        "output_cost_per_image": 0.134,
+        "output_cost_per_token": 1.2e-05,
+        "output_cost_per_token_batches": 6e-06,
+        "source": "https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/gemini/3-pro-image"
+    },
     "vertex_ai/imagegeneration@006": {
         "litellm_provider": "vertex_ai-image-models",
         "mode": "image_generation",