docs(release-notes): add v1.83.7.rc.1 release notes

2026-09-06 08:16:43 +00:00 · 2026-04-11 22:01:18 -07:00 · 2026-04-11 22:01:18 -07:00 · b2e4eea389
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+---
+title: "[Preview] v1.83.7.rc.1 - Anthropic Advisor Tool, MCP Per-User OAuth, AWS GovCloud Bedrock"
+slug: "v1-83-7-rc-1"
+date: 2026-04-11T00:00:00
+authors:
+  - name: Krrish Dholakia
+    title: CEO, LiteLLM
+    url: https://www.linkedin.com/in/krish-d/
+    image_url: https://pbs.twimg.com/profile_images/1298587542745358340/DZv3Oj-h_400x400.jpg
+  - name: Ishaan Jaff
+    title: CTO, LiteLLM
+    url: https://www.linkedin.com/in/reffajnaahsi/
+    image_url: https://pbs.twimg.com/profile_images/1613813310264340481/lz54oEiB_400x400.jpg
+  - name: Ryan Crabbe
+    title: Full Stack Engineer, LiteLLM
+    url: https://www.linkedin.com/in/ryan-crabbe-0b9687214
+    image_url: https://media.licdn.com/dms/image/v2/D5603AQHt1t9Z4BJ6Gw/profile-displayphoto-shrink_400_400/profile-displayphoto-shrink_400_400/0/1724453682340?e=1772064000&v=beta&t=VXdmr13rsNB05wyA2F1TENOB5UuDHUZ0FCHTolNyR5M
+  - name: Yuneng Jiang
+    title: Senior Full Stack Engineer, LiteLLM
+    url: https://www.linkedin.com/in/yuneng-david-jiang-455676139/
+    image_url: https://avatars.githubusercontent.com/u/171294688?v=4
+  - name: Shivam Rawat
+    title: Forward Deployed Engineer, LiteLLM
+    url: https://linkedin.com/in/shivam-rawat-482937318
+    image_url: https://github.com/shivamrawat1.png
+  - name: Harish Mohan
+    title: Engineer, LiteLLM
+    url: https://github.com/harish876
+    image_url: https://github.com/harish876.png
+hide_table_of_contents: false
+---
+
+## Deploy this version
+
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+
+<Tabs>
+<TabItem value="docker" label="Docker">
+
+```bash
+docker run \
+-e STORE_MODEL_IN_DB=True \
+-p 4000:4000 \
+docker.litellm.ai/berriai/litellm:main-v1.83.7.rc.1
+```
+
+</TabItem>
+<TabItem value="pip" label="Pip">
+
+```bash
+pip install litellm==1.83.7rc1
+```
+
+</TabItem>
+</Tabs>
+
+## Key Highlights
+
+- **Anthropic Advisor Tool** — [Support for the new `advisor_20260301` tool type, enabling Anthropic's structured advisor capabilities](../../docs/completion/anthropic_advisor_tool)
+- **MCP Per-User OAuth Token Storage** — [Store and reuse per-user OAuth tokens for interactive MCP flows — no repeated auth prompts](../../docs/mcp)
+- **AWS GovCloud Bedrock Claude Sonnet 4.5** — Support for `claude-sonnet-4-5` in `us-gov-east-1` and `us-gov-west-1` regions with correct pricing and prompt caching
+- **11 New Baseten Models** — MiniMax, Nvidia Nemotron, GLM, Kimi, DeepSeek and GPT-OSS models added to the Baseten catalog
+- **MCP stdio RCE Fix** — [Blocked arbitrary command execution via stdio transport](../../docs/mcp)
+- **Team Spend Logs** — Team members can now view team-wide spend logs directly from the UI with proper RBAC enforcement
+- **File Content Streaming** — OpenAI file content endpoint now supports streaming responses
+
+---
+
+## New Models / Updated Models
+
+#### New Model Support (14 new models)
+
+| Provider | Model | Context Window | Input ($/1M tokens) | Output ($/1M tokens) | Features |
+| -------- | ----- | -------------- | ------------------- | -------------------- | -------- |
+| AWS Bedrock (GovCloud) | `bedrock/us-gov-east-1/anthropic.claude-sonnet-4-5-20250929-v1:0` | 200K | $3.30 | $16.50 | Prompt caching, vision, function calling, computer use, reasoning, native structured output |
+| AWS Bedrock (GovCloud) | `bedrock/us-gov-west-1/anthropic.claude-sonnet-4-5-20250929-v1:0` | 200K | $3.30 | $16.50 | Prompt caching, vision, function calling, computer use, reasoning, native structured output |
+| AWS Bedrock (GovCloud) | `us-gov.anthropic.claude-sonnet-4-5-20250929-v1:0` | 200K | $3.30 | $16.50 | Prompt caching, vision, function calling, computer use, reasoning, native structured output |
+| Baseten | `baseten/MiniMaxAI/MiniMax-M2.5` | - | $0.30 | $1.20 | Chat completions |
+| Baseten | `baseten/nvidia/Nemotron-120B-A12B` | - | $0.30 | $0.75 | Chat completions |
+| Baseten | `baseten/zai-org/GLM-5` | - | $0.95 | $3.15 | Chat completions |
+| Baseten | `baseten/zai-org/GLM-4.7` | - | $0.60 | $2.20 | Chat completions |
+| Baseten | `baseten/zai-org/GLM-4.6` | - | $0.60 | $2.20 | Chat completions |
+| Baseten | `baseten/moonshotai/Kimi-K2.5` | - | $0.60 | $3.00 | Chat completions |
+| Baseten | `baseten/moonshotai/Kimi-K2-Thinking` | - | $0.60 | $2.50 | Chat completions |
+| Baseten | `baseten/moonshotai/Kimi-K2-Instruct-0905` | - | $0.60 | $2.50 | Chat completions |
+| Baseten | `baseten/openai/gpt-oss-120b` | - | $0.10 | $0.50 | Chat completions |
+| Baseten | `baseten/deepseek-ai/DeepSeek-V3.1` | - | $0.50 | $1.50 | Chat completions |
+| Baseten | `baseten/deepseek-ai/DeepSeek-V3-0324` | - | $0.77 | $0.77 | Chat completions |
+
+#### Features
+
+- **[Anthropic](../../docs/providers/anthropic)**
+    - Support `advisor_20260301` tool type for structured advisor responses - [PR #25525](https://github.com/BerriAI/litellm/pull/25525), [PR #25545](https://github.com/BerriAI/litellm/pull/25545)
+
+- **[Google Gemini](../../docs/providers/gemini)**
+    - Add `supports_service_tier` flag to `gemini-2.5-flash`, `gemini-2.5-pro`, `gemini-3-pro`, `gemini-3-flash`, `gemini-2.5-flash-lite`, and related image preview models - [PR #25562](https://github.com/BerriAI/litellm/pull/25562)
+
+### Bug Fixes
+
+- **[AWS Bedrock](../../docs/providers/bedrock)**
+    - Fix double-counting of cache tokens in Anthropic Messages streaming usage - [PR #25517](https://github.com/BerriAI/litellm/pull/25517)
+    - Update `us-gov` Claude Sonnet 4.5 pricing: $3.30/$16.50 per 1M tokens, 8K max output, add native structured output - [PR #25562](https://github.com/BerriAI/litellm/pull/25562)
+
+## LLM API Endpoints
+
+#### Features
+
+- **[Responses API (/responses)](../../docs/response_api)**
+    - Append `?model=` query param to backend WebSocket URL for correct model routing - [PR #25437](https://github.com/BerriAI/litellm/pull/25437)
+    - Fix duplicate keyword argument error in Responses WebSocket handler - [PR #25513](https://github.com/BerriAI/litellm/pull/25513)
+
+- **[Files API (/files)](../../docs/proxy/pass_through)**
+    - Add file content streaming support for OpenAI-compatible file endpoints - [PR #25450](https://github.com/BerriAI/litellm/pull/25450), [PR #25569](https://github.com/BerriAI/litellm/pull/25569)
+
+#### Bugs
+
+- **General**
+    - Fix pass-through of multipart uploads and Bedrock JSON body in proxy requests - [PR #25464](https://github.com/BerriAI/litellm/pull/25464)
+    - Align v1 guardrail and agent list response field handling with v2 - [PR #25478](https://github.com/BerriAI/litellm/pull/25478)
+
+## Management Endpoints / UI
+
+#### Features
+
+- **Teams + Organizations**
+    - Add `POST /team/permissions_bulk_update` endpoint for bulk team permission management - [PR #25239](https://github.com/BerriAI/litellm/pull/25239)
+    - Align org and team endpoint permission checks for consistent RBAC enforcement - [PR #25554](https://github.com/BerriAI/litellm/pull/25554)
+    - Consolidate route auth for UI and API tokens - [PR #25473](https://github.com/BerriAI/litellm/pull/25473)
+
+- **Spend Logs**
+    - Team members can view team-wide spend logs from the UI with RBAC enforcement - [PR #25458](https://github.com/BerriAI/litellm/pull/25458)
+
+- **Virtual Keys**
+    - Align `/v2/key/info` response field handling with `/v1/key/info` - [PR #25313](https://github.com/BerriAI/litellm/pull/25313)
+
+#### Bugs
+
+- Improve input validation on management endpoints to reject malformed requests - [PR #25445](https://github.com/BerriAI/litellm/pull/25445)
+- Use parameterized query for combined-view token lookup to prevent SQL injection - [PR #25467](https://github.com/BerriAI/litellm/pull/25467)
+- Fix session-timezone-independent date filtering for spend/error log queries - [PR #25542](https://github.com/BerriAI/litellm/pull/25542)
+- Improve UI storage handling and Dockerfile consistency - [PR #25384](https://github.com/BerriAI/litellm/pull/25384)
+
+## AI Integrations
+
+### Logging
+
+- **General**
+    - Ensure spend/cost logging runs correctly when `stream=True` in websearch interception - [PR #25424](https://github.com/BerriAI/litellm/pull/25424)
+
+### Guardrails
+
+- Add `applyGuardrail` support for inline IAM-based guardrails - [PR #25241](https://github.com/BerriAI/litellm/pull/25241)
+- Add UI option to skip system messages in guardrail processing - [PR #25562](https://github.com/BerriAI/litellm/pull/25562)
+
+## Spend Tracking, Budgets and Rate Limiting
+
+- Team members can now access team-wide spend logs with proper RBAC enforcement - [PR #25458](https://github.com/BerriAI/litellm/pull/25458)
+- Fix timezone-independent date filtering in spend/error log queries - [PR #25542](https://github.com/BerriAI/litellm/pull/25542)
+
+## MCP Gateway
+
+- **Security**: Block arbitrary command execution via stdio transport - [PR #25343](https://github.com/BerriAI/litellm/pull/25343)
+- Add per-user OAuth token storage for interactive MCP flows - [PR #25441](https://github.com/BerriAI/litellm/pull/25441)
+- Set default 60-second timeout for A2A client creation - [PR #25514](https://github.com/BerriAI/litellm/pull/25514)
+
+## Performance / Loadbalancing / Reliability improvements
+
+- Fix node-gyp symlink path after npm upgrade in Dockerfile - [PR #25048](https://github.com/BerriAI/litellm/pull/25048)
+- Handle missing `.npmrc` gracefully in `Dockerfile.non_root` - [PR #25307](https://github.com/BerriAI/litellm/pull/25307)
+- Harden file path resolution in skill archive extraction - [PR #25475](https://github.com/BerriAI/litellm/pull/25475)
+
+## Documentation Updates
+
+- Add Anthropic Advisor Tool guide - [PR #25545](https://github.com/BerriAI/litellm/pull/25545)
+- Add missing MCP per-user token env vars to `config_settings` reference - [PR #25471](https://github.com/BerriAI/litellm/pull/25471)
+- Update guardrails quick-start and proxy config settings docs - [PR #25562](https://github.com/BerriAI/litellm/pull/25562)
+
+## New Contributors
+
+* @csoni-cweave made their first contribution in https://github.com/BerriAI/litellm/pull/25441
+* @jaydns made their first contribution in https://github.com/BerriAI/litellm/pull/25445
+
+**Full Changelog**: https://github.com/BerriAI/litellm/compare/v1.83.3.rc.1...v1.83.7.rc.1