feat(providers): add Gemini 3.8 Flash (#7402)

Claude-Session: https://claude.ai/code/session_01LKqTj3FNr4iS5jMy1gZe2D

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: waleedlatif1

apps/docs/content/docs/workflows/blocks/agent.mdx

@@ -112,7 +112,7 @@ Live tool-call chips stream for **OpenAI, Anthropic, Azure Anthropic, Google, Ve
 | Anthropic | Summaries only — These generations omit full thinking; Sim requests summarized thinking on streaming runs. | `claude-fable-5-1`, `claude-fable-5`, `claude-sonnet-5`, `claude-opus-5`, `claude-opus-4-8`, `claude-opus-4-7`, `claude-opus-4-6`, `claude-sonnet-4-6`, `claude-opus-4-5`, `claude-opus-4-1`, `claude-sonnet-4-5`, `claude-haiku-4-5` |
 | Azure OpenAI | Summaries only — Requires OpenAI organization verification; falls back to no summaries. | `azure/gpt-5.4`, `azure/gpt-5.4-mini`, `azure/gpt-5.4-nano`, `azure/gpt-5.2`, `azure/gpt-5.1`, `azure/gpt-5.1-codex`, `azure/gpt-5`, `azure/gpt-5-mini`, `azure/gpt-5-nano`, `azure/o3`, `azure/o4-mini` |
 | Azure Anthropic | Summaries only — These generations omit full thinking; Sim requests summarized thinking on streaming runs. | `azure-anthropic/claude-opus-4-6`, `azure-anthropic/claude-opus-4-5`, `azure-anthropic/claude-sonnet-4-5`, `azure-anthropic/claude-opus-4-1`, `azure-anthropic/claude-haiku-4-5` |
-| Google | Summaries only | `gemini-3.6-flash`, `gemini-3.5-flash-lite`, `gemini-3.5-flash`, `gemini-3.1-pro-preview`, `gemini-3.1-flash-lite`, `gemini-3-flash-preview`, `gemini-2.5-pro`, `gemini-2.5-flash`, `gemini-2.5-flash-lite` |
+| Google | Summaries only | `gemini-3.8-flash`, `gemini-3.6-flash`, `gemini-3.5-flash-lite`, `gemini-3.5-flash`, `gemini-3.1-pro-preview`, `gemini-3.1-flash-lite`, `gemini-3-flash-preview`, `gemini-2.5-pro`, `gemini-2.5-flash`, `gemini-2.5-flash-lite` |
 | Vertex AI | Summaries only | `vertex/gemini-3.5-flash`, `vertex/gemini-3.1-pro-preview`, `vertex/gemini-3.1-flash-lite`, `vertex/gemini-3-flash-preview`, `vertex/gemini-2.5-pro`, `vertex/gemini-2.5-flash`, `vertex/gemini-2.5-flash-lite` |
 | DeepSeek | Full thinking deltas | `deepseek-v4-pro`, `deepseek-v4-flash`, `deepseek-reasoner` |
 | xAI | Full thinking deltas | `grok-4.6`, `grok-4.5`, `grok-4.3`, `grok-4.20-multi-agent-0309` |

apps/sim/providers/models.ts

@@ -1594,6 +1594,26 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
     icon: GeminiIcon,
     color: '#4285F4',
     models: [
+      {
+        id: 'gemini-3.8-flash',
+        pricing: {
+          input: 0.75,
+          cachedInput: 0.075,
+          output: 3.75,
+          updatedAt: '2026-09-02',
+        },
+        capabilities: {
+          temperature: { min: 0, max: 2 },
+          thinking: {
+            levels: ['low', 'medium', 'high'],
+            default: 'medium',
+          },
+          maxOutputTokens: 65536,
+        },
+        contextWindow: 1048576,
+        releaseDate: '2026-09-02',
+        recommended: true,
+      },
       {
         id: 'gemini-3.6-flash',
         pricing: {
@@ -1612,7 +1632,6 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
         },
         contextWindow: 1048576,
         releaseDate: '2026-07-21',
-        recommended: true,
       },
       {
         id: 'gemini-3.5-flash-lite',