feat: add LLM Gateway provider (#7847)

Co-authored-by: Claude Opus 4.5 <[email protected]>
Co-authored-by: Aiden Cline <[email protected]>
Co-authored-by: Aiden Cline <[email protected]>

5 files changed, 83 insertions, 2 deletions

diff --git a/packages/opencode/src/provider/provider.ts b/packages/opencode/src/provider/provider.ts
index 711481d80..558bcb75a 100644
--- a/packages/opencode/src/provider/provider.ts
+++ b/packages/opencode/src/provider/provider.ts
@@ -390,6 +390,17 @@ function custom(dep: CustomDep): Record<string, CustomLoader> {
         },
       }
     }),
+    llmgateway: () =>
+      Effect.succeed({
+        autoload: false,
+        options: {
+          headers: {
+            "HTTP-Referer": "https://opencode.ai/",
+            "X-Title": "opencode",
+            "X-Source": "opencode",
+          },
+        },
+      }),
     openrouter: () =>
       Effect.succeed({
         autoload: false,
diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index 284fb0fca..1b6b0918b 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -807,7 +807,7 @@ export function options(input: {
     result["promptCacheKey"] = input.sessionID
   }
 
-  if (input.model.api.npm === "@openrouter/ai-sdk-provider") {
+  if (input.model.api.npm === "@openrouter/ai-sdk-provider" || input.model.api.npm === "@llmgateway/ai-sdk-provider") {
     result["usage"] = {
       include: true,
     }
@@ -944,7 +944,7 @@ export function smallOptions(model: Provider.Model) {
     }
     return { thinkingConfig: { thinkingBudget: 0 } }
   }
-  if (model.providerID === "openrouter") {
+  if (model.providerID === "openrouter" || model.providerID === "llmgateway") {
     if (model.api.id.includes("google")) {
       return { reasoning: { enabled: false } }
     }
diff --git a/packages/opencode/test/preload.ts b/packages/opencode/test/preload.ts
index a2592286a..58dc2b0b4 100644
--- a/packages/opencode/test/preload.ts
+++ b/packages/opencode/test/preload.ts
@@ -62,6 +62,7 @@ delete process.env["AWS_PROFILE"]
 delete process.env["AWS_REGION"]
 delete process.env["AWS_BEARER_TOKEN_BEDROCK"]
 delete process.env["OPENROUTER_API_KEY"]
+delete process.env["LLM_GATEWAY_API_KEY"]
 delete process.env["GROQ_API_KEY"]
 delete process.env["MISTRAL_API_KEY"]
 delete process.env["PERPLEXITY_API_KEY"]
diff --git a/packages/ui/src/components/provider-icons/types.ts b/packages/ui/src/components/provider-icons/types.ts
index f9ddfdf0e..5a9728750 100644
--- a/packages/ui/src/components/provider-icons/types.ts
+++ b/packages/ui/src/components/provider-icons/types.ts
@@ -32,6 +32,7 @@ export const iconNames = [
   "perplexity",
   "ovhcloud",
   "openrouter",
+  "llmgateway",
   "opencode",
   "opencode-go",
   "openai",
diff --git a/packages/web/src/content/docs/providers.mdx b/packages/web/src/content/docs/providers.mdx
index 163dcdcf2..bad9e1ebb 100644
--- a/packages/web/src/content/docs/providers.mdx
+++ b/packages/web/src/content/docs/providers.mdx
@@ -1577,6 +1577,74 @@ OpenCode Zen is a list of tested and verified models provided by the OpenCode te
 
 ---
 
+### LLM Gateway
+
+1. Head over to the [LLM Gateway dashboard](https://llmgateway.io/dashboard), click **Create API Key**, and copy the key.
+
+2. Run the `/connect` command and search for LLM Gateway.
+
+   ```txt
+   /connect
+   ```
+
+3. Enter the API key for the provider.
+
+   ```txt
+   ┌ API key
+   │
+   │
+   └ enter
+   ```
+
+4. Many LLM Gateway models are preloaded by default, run the `/models` command to select the one you want.
+
+   ```txt
+   /models
+   ```
+
+   You can also add additional models through your opencode config.
+
+   ```json title="opencode.json" {6}
+   {
+     "$schema": "https://opencode.ai/config.json",
+     "provider": {
+       "llmgateway": {
+         "models": {
+           "somecoolnewmodel": {}
+         }
+       }
+     }
+   }
+   ```
+
+5. You can also customize them through your opencode config. Here's an example of specifying a provider
+
+   ```json title="opencode.json"
+   {
+     "$schema": "https://opencode.ai/config.json",
+     "provider": {
+       "llmgateway": {
+         "models": {
+           "glm-4.7": {
+             "name": "GLM 4.7"
+           },
+           "gpt-5.2": {
+             "name": "GPT-5.2"
+           },
+           "gemini-2.5-pro": {
+             "name": "Gemini 2.5 Pro"
+           },
+           "claude-3-5-sonnet-20241022": {
+             "name": "Claude 3.5 Sonnet"
+           }
+         }
+       }
+     }
+   }
+   ```
+
+---
+
 ### SAP AI Core
 
 SAP AI Core provides access to 40+ models from OpenAI, Anthropic, Google, Amazon, Meta, Mistral, and AI21 through a unified platform.