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docs/my-website/release_notes/v1.81.9.md
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---
title: "v1.81.9 - Claude Opus 4.6, A2A Agent Gateway, MCP Semantic Filtering & IP Controls"
title: "v1.81.9 - Control which MCP Servers are exposed on the Internet"
slug: "v1-81-9"
date: 2026-02-07T00:00:00
authors:
@ -51,13 +51,17 @@ pip install litellm==1.81.9
## MCP Servers on the Public Internet
<Image
img={require('../img/release_notes/mcp_internet.png')}
style={{ maxWidth: '900px', width: '100%' }}
/>
&nbsp;
This release makes it safe to expose MCP servers on the public internet by adding public/private visibility and IP-based access control. You can now run internet-facing MCP services while restricting access to trusted networks and keeping internal tools private.
[Get started](../../docs/mcp_public_internet)
{/* TODO: Add screenshot - save as mcp_public_internet.png */}
{/* <Image img={require('../../img/mcp_public_internet.png')} style={{ maxWidth: '900px', width: '100%' }} /> */}
Let's dive in.
---
@ -66,29 +70,27 @@ Let's dive in.
#### New Model Support (13 new models)
| Provider | Model | Context Window | Input ($/1M tokens) | Output ($/1M tokens) | Features |
| -------- | ----- | -------------- | ------------------- | -------------------- | -------- |
| Anthropic | `claude-opus-4-6` | 1M | $5.00 | $25.00 | Chat, vision, reasoning, function calling, computer use, PDF, prompt caching |
| AWS Bedrock | `anthropic.claude-opus-4-6-v1` | 1M | $5.00 | $25.00 | Chat, vision, reasoning, function calling, computer use, PDF, prompt caching |
| Azure AI | `azure_ai/claude-opus-4-6` | 200K | $5.00 | $25.00 | Chat, vision, reasoning, function calling, computer use, PDF, prompt caching |
| Vertex AI | `vertex_ai/claude-opus-4-6` | 1M | $5.00 | $25.00 | Chat, vision, reasoning, function calling, computer use, PDF, prompt caching |
| Google Gemini | `gemini/deep-research-pro-preview-12-2025` | 65K | $2.00 | $12.00 | Deep research |
| Vertex AI | `vertex_ai/deep-research-pro-preview-12-2025` | 65K | $2.00 | $12.00 | Deep research |
| Moonshot | `moonshot/kimi-k2.5` | 262K | $0.60 | $3.00 | Chat, vision, function calling |
| OpenRouter | `openrouter/qwen/qwen3-235b-a22b-2507` | 262K | $0.07 | $0.10 | Chat, function calling |
| OpenRouter | `openrouter/qwen/qwen3-235b-a22b-thinking-2507` | 262K | $0.11 | $0.60 | Chat, function calling, reasoning |
| Together AI | `together_ai/zai-org/GLM-4.7` | 200K | $0.45 | $2.00 | Chat, function calling, reasoning |
| Together AI | `together_ai/moonshotai/Kimi-K2.5` | 256K | $0.50 | $2.80 | Chat, vision, function calling, reasoning |
| ElevenLabs | `elevenlabs/eleven_v3` | - | $0.18/1K chars | - | Text-to-speech, 70+ languages |
| ElevenLabs | `elevenlabs/eleven_multilingual_v2` | - | $0.18/1K chars | - | Text-to-speech, 29 languages |
| Provider | Model | Context Window | Input ($/1M tokens) | Output ($/1M tokens) |
| -------- | ----- | -------------- | ------------------- | -------------------- |
| Anthropic | `claude-opus-4-6` | 1M | $5.00 | $25.00 |
| AWS Bedrock | `anthropic.claude-opus-4-6-v1` | 1M | $5.00 | $25.00 |
| Azure AI | `azure_ai/claude-opus-4-6` | 200K | $5.00 | $25.00 |
| Vertex AI | `vertex_ai/claude-opus-4-6` | 1M | $5.00 | $25.00 |
| Google Gemini | `gemini/deep-research-pro-preview-12-2025` | 65K | $2.00 | $12.00 |
| Vertex AI | `vertex_ai/deep-research-pro-preview-12-2025` | 65K | $2.00 | $12.00 |
| Moonshot | `moonshot/kimi-k2.5` | 262K | $0.60 | $3.00 |
| OpenRouter | `openrouter/qwen/qwen3-235b-a22b-2507` | 262K | $0.07 | $0.10 |
| OpenRouter | `openrouter/qwen/qwen3-235b-a22b-thinking-2507` | 262K | $0.11 | $0.60 |
| Together AI | `together_ai/zai-org/GLM-4.7` | 200K | $0.45 | $2.00 |
| Together AI | `together_ai/moonshotai/Kimi-K2.5` | 256K | $0.50 | $2.80 |
| ElevenLabs | `elevenlabs/eleven_v3` | - | $0.18/1K chars | - |
| ElevenLabs | `elevenlabs/eleven_multilingual_v2` | - | $0.18/1K chars | - |
#### Features
- **[Anthropic](../../docs/providers/anthropic)**
- Full Claude Opus 4.6 support with adaptive thinking across all regions (us, eu, apac, au) - [PR #20506](https://github.com/BerriAI/litellm/pull/20506), [PR #20508](https://github.com/BerriAI/litellm/pull/20508), [PR #20514](https://github.com/BerriAI/litellm/pull/20514), [PR #20551](https://github.com/BerriAI/litellm/pull/20551)
- Add unsupported claude code beta headers filtering - [PR #20578](https://github.com/BerriAI/litellm/pull/20578)
- Map reasoning content to anthropic thinking block (streaming + non-streaming) - [PR #20254](https://github.com/BerriAI/litellm/pull/20254)
- Fix inconsistent response format in `anthropic.messages.acreate()` when using non-Anthropic providers - [PR #20442](https://github.com/BerriAI/litellm/pull/20442)
- **[AWS Bedrock](../../docs/providers/bedrock)**
- Add 1hr tiered caching costs for long-context models - [PR #20214](https://github.com/BerriAI/litellm/pull/20214)
@ -159,6 +161,10 @@ Let's dive in.
| `/chat/completions` | POST | A2A agent invocation via standard completions API | [Docs](../../docs/a2a) |
| `/files` | GET/DELETE | Gemini file retrieval and deletion by `file_id` | [Docs](../../docs/providers/gemini) |
- **[Messages API](../../docs/providers/anthropic)**
- Filter unsupported Claude Code beta headers for non-Anthropic providers - [PR #20578](https://github.com/BerriAI/litellm/pull/20578)
- Fix inconsistent response format in `anthropic.messages.acreate()` when using non-Anthropic providers - [PR #20442](https://github.com/BerriAI/litellm/pull/20442)
- **[A2A Agent Gateway](../../docs/a2a)**
- Allow calling A2A agents through LiteLLM `/chat/completions` API - [PR #20358](https://github.com/BerriAI/litellm/pull/20358)
- Use A2A registered agents with `/chat/completions` - [PR #20362](https://github.com/BerriAI/litellm/pull/20362)