changelog: gateway 2.18.0

changelog/enterprise.mdx

@@ -1,13 +1,58 @@
 ---
 title: "Enterprise Gateway"
-sidebarTitle: "Enterprise Gateway [2.16.0]"
+sidebarTitle: "Enterprise Gateway [2.18.0]"
 rss: true
 ---
 
 <Card title="Schedule Call" href="https://www.paloaltonetworks.com/ai-security/ai-gateway#:~:text=See%20Prisma%20AIRS%20AI%20Gateway%20in%20Action" icon="calendar" horizontal>
 Discuss how Portkey's AI Gateway can enhance your organization's AI infrastructure
 </Card>
 
+<Update label="2.18.0" description="2026-08-10">
+
+## v2.18.0
+
+---
+
+### Native OCR Endpoint
+
+New `POST /v1/ocr` endpoint brings OCR requests under the gateway's retries, fallbacks, load balancing, caching, logging, and pricing. Currently supports Mistral AI and Azure AI Foundry.
+
+[OCR API Reference](/api-reference/inference-api/ocr) · [Mistral AI Documentation](/integrations/llms/mistral-ai#ocr-document-processing) · [Azure AI Foundry Documentation](/integrations/llms/azure-foundry#ocr-document-processing)
+
+### Singulr Guardrail
+
+New Singulr partner guardrail plugin for request and response scanning, configurable through the standard guardrails workflow.
+
+[Guardrails Documentation](/product/guardrails)
+
+### MCP Tool Call Rate Limits
+
+Rate limits can now be applied to MCP tool calls, throttling tool invocation volume per the configured limits.
+
+[MCP Rate Limits Documentation](/product/mcp-gateway/rate-limits)
+
+### Guardrail Header Forwarding
+
+Guardrail checks can now be configured to forward specific client request headers (e.g. `x-session-id`, `traceparent`) to their upstream provider. Credential headers are never forwarded.
+
+[Guardrails Documentation](/product/guardrails)
+
+### Provider Updates
+
+- **OpenAI & Azure OpenAI**: `prompt_cache_options` parameter can now be passed through to control prompt caching behavior
+- **Azure AI Foundry**: Input items sent via the Responses API now get an explicit `type: message` field, fixing rejected requests from clients (e.g. OpenCode) that omit it
+- **Bedrock (Mantle)**: OpenAI models now support the native Messages API, gated behind the `use-responses-api-2026-07-30` beta header
+- **Bedrock (Mantle)**: `propertyNames` is stripped from tool schemas for Gemma models to prevent validation errors
+
+[Providers Documentation](/integrations/llms)
+
+### Fixes and Improvements
+
+- Updated dependencies to patch security vulnerabilities.
+
+</Update>
+
 <Update label="2.17.0" description="2026-08-03">
 
 ## v2.17.0