[Draft] v1.77.5 Release note (#14985)

* docs draft * docs fix * docs * docs fix * doc fix * docs * docs fix
2026-09-08 22:21:35 +00:00 · 2025-09-27 16:33:58 -07:00 · 2025-09-27 16:33:58 -07:00 · 6299f07e54
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+---
+title: "[Preview] v1.77.5-stable - MCP OAuth 2.0 Support"
+slug: "v1-77-5"
+date: 2025-09-29T10:00:00
+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
+
+hide_table_of_contents: false
+---
+
+import Image from '@theme/IdealImage';
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+
+## Deploy this version
+
+<Tabs>
+<TabItem value="docker" label="Docker">
+
+``` showLineNumbers title="docker run litellm"
+```
+
+</TabItem>
+
+<TabItem value="pip" label="Pip">
+
+``` showLineNumbers title="pip install litellm"
+```
+
+</TabItem>
+</Tabs>
+
+---
+
+## Key Highlights
+
+- **MCP OAuth 2.0 Support** - Enhanced authentication for Model Context Protocol integrations
+- **Scheduled Key Rotations** - Automated key rotation capabilities for enhanced security
+- **New Gemini 2.5 Flash & Flash-lite Models** - Latest September 2025 preview models with improved pricing and features
+- **Performance Improvements** - Critical InMemoryCache unbounded growth resolution
+
+## New Models / Updated Models
+
+#### New Model Support
+
+| Provider | Model | Context Window | Input ($/1M tokens) | Output ($/1M tokens) | Features |
+| -------- | ----- | -------------- | ------------------- | -------------------- | -------- |
+| Gemini | `gemini-2.5-flash-preview-09-2025` | 1M | $0.30 | $2.50 | Chat, reasoning, vision, audio |
+| Gemini | `gemini-2.5-flash-lite-preview-09-2025` | 1M | $0.10 | $0.40 | Chat, reasoning, vision, audio |
+| Gemini | `gemini-flash-latest` | 1M | $0.30 | $2.50 | Chat, reasoning, vision, audio |
+| Gemini | `gemini-flash-lite-latest` | 1M | $0.10 | $0.40 | Chat, reasoning, vision, audio |
+| DeepSeek | `deepseek-chat` | 131K | $0.60 | $1.70 | Chat, function calling, caching |
+| DeepSeek | `deepseek-reasoner` | 131K | $0.60 | $1.70 | Chat, reasoning |
+| Bedrock | `deepseek.v3-v1:0` | 164K | $0.58 | $1.68 | Chat, reasoning, function calling |
+| Azure | `azure/gpt-5-codex` | 272K | $1.25 | $10.00 | Responses API, reasoning, vision |
+| OpenAI | `gpt-5-codex` | 272K | $1.25 | $10.00 | Responses API, reasoning, vision |
+| SambaNova | `sambanova/DeepSeek-V3.1` | 33K | $3.00 | $4.50 | Chat, reasoning, function calling |
+| SambaNova | `sambanova/gpt-oss-120b` | 131K | $3.00 | $4.50 | Chat, reasoning, function calling |
+| Bedrock | `qwen.qwen3-coder-480b-a35b-v1:0` | 262K | $0.22 | $1.80 | Chat, reasoning, function calling |
+| Bedrock | `qwen.qwen3-235b-a22b-2507-v1:0` | 262K | $0.22 | $0.88 | Chat, reasoning, function calling |
+| Bedrock | `qwen.qwen3-coder-30b-a3b-v1:0` | 262K | $0.15 | $0.60 | Chat, reasoning, function calling |
+| Bedrock | `qwen.qwen3-32b-v1:0` | 131K | $0.15 | $0.60 | Chat, reasoning, function calling |
+| Vertex AI | `vertex_ai/qwen/qwen3-next-80b-a3b-instruct-maas` | 262K | $0.15 | $1.20 | Chat, function calling |
+| Vertex AI | `vertex_ai/qwen/qwen3-next-80b-a3b-thinking-maas` | 262K | $0.15 | $1.20 | Chat, function calling |
+| Vertex AI | `vertex_ai/deepseek-ai/deepseek-v3.1-maas` | 164K | $1.35 | $5.40 | Chat, reasoning, function calling |
+| OpenRouter | `openrouter/x-ai/grok-4-fast:free` | 2M | $0.00 | $0.00 | Chat, reasoning, function calling |
+| XAI | `xai/grok-4-fast-reasoning` | 2M | $0.20 | $0.50 | Chat, reasoning, function calling |
+| XAI | `xai/grok-4-fast-non-reasoning` | 2M | $0.20 | $0.50 | Chat, function calling |
+
+#### Features
+
+- **[Gemini](../../docs/providers/gemini)**
+    - Added Gemini 2.5 Flash and Flash-lite preview models (September 2025 release) with improved pricing - [PR #14948](https://github.com/BerriAI/litellm/pull/14948)
+    - Added new Anthropic web fetch tool support - [PR #14951](https://github.com/BerriAI/litellm/pull/14951)
+- **[XAI](../../docs/providers/xai)**
+    - Add xai/grok-4-fast models - [PR #14833](https://github.com/BerriAI/litellm/pull/14833)
+- **[Anthropic](../../docs/providers/anthropic)**
+    - Updated Claude Sonnet 4 configs to reflect million-token context window pricing - [PR #14639](https://github.com/BerriAI/litellm/pull/14639)
+    - Added supported text field to anthropic citation response - [PR #14164](https://github.com/BerriAI/litellm/pull/14164)
+- **[Bedrock](../../docs/providers/bedrock)**
+    - Added support for Qwen models family & Deepseek 3.1 to Amazon Bedrock - [PR #14845](https://github.com/BerriAI/litellm/pull/14845)
+    - Support requestMetadata in Bedrock Converse API - [PR #14570](https://github.com/BerriAI/litellm/pull/14570)
+- **[Vertex AI](../../docs/providers/vertex)**
+    - Added vertex_ai/qwen models and azure/gpt-5-codex - [PR #14844](https://github.com/BerriAI/litellm/pull/14844)
+    - Update vertex ai qwen model pricing - [PR #14828](https://github.com/BerriAI/litellm/pull/14828)
+    - Vertex AI Context Caching: use Vertex ai API v1 instead of v1beta1 and accept 'cachedContent' param - [PR #14831](https://github.com/BerriAI/litellm/pull/14831)
+- **[SambaNova](../../docs/providers/sambanova)**
+    - Add sambanova deepseek v3.1 and gpt-oss-120b - [PR #14866](https://github.com/BerriAI/litellm/pull/14866)
+- **[OpenAI](../../docs/providers/openai)**
+    - Fix inconsistent token configs for gpt-5 models - [PR #14942](https://github.com/BerriAI/litellm/pull/14942)
+    - GPT-3.5-Turbo price updated - [PR #14858](https://github.com/BerriAI/litellm/pull/14858)
+- **[OpenRouter](../../docs/providers/openrouter)**
+    - Add gpt-5 and gpt-5-codex to OpenRouter cost map - [PR #14879](https://github.com/BerriAI/litellm/pull/14879)
+- **[VLLM](../../docs/providers/vllm)**
+    - Fix vllm passthrough - [PR #14778](https://github.com/BerriAI/litellm/pull/14778)
+- **[Flux](../../docs/image_generation)**
+    - Support flux image edit - [PR #14790](https://github.com/BerriAI/litellm/pull/14790)
+
+### Bug Fixes
+
+- **[Anthropic](../../docs/providers/anthropic)**
+    - Fix: Support claude code auth via subscription (anthropic) - [PR #14821](https://github.com/BerriAI/litellm/pull/14821)
+    - Fix Anthropic streaming IDs - [PR #14965](https://github.com/BerriAI/litellm/pull/14965)
+    - Revert incorrect changes to sonnet-4 max output tokens - [PR #14933](https://github.com/BerriAI/litellm/pull/14933)
+- **[OpenAI](../../docs/providers/openai)**
+    - Fix a bug where openai image edit silently ignores multiple images - [PR #14893](https://github.com/BerriAI/litellm/pull/14893)
+- **[VLLM](../../docs/providers/vllm)**
+    - Fix: vLLM provider's rerank endpoint from /v1/rerank to /rerank - [PR #14938](https://github.com/BerriAI/litellm/pull/14938)
+
+#### New Provider Support
+
+- **[W&B Inference](../../docs/providers/wandb)**
+    - Add W&B Inference to LiteLLM - [PR #14416](https://github.com/BerriAI/litellm/pull/14416)
+
+---
+
+## LLM API Endpoints
+
+#### Features
+
+- **General**
+    - Add SDK support for additional headers - [PR #14761](https://github.com/BerriAI/litellm/pull/14761)
+    - Add shared_session parameter for aiohttp ClientSession reuse - [PR #14721](https://github.com/BerriAI/litellm/pull/14721)
+
+#### Bugs
+
+- **General**
+    - Fix: Streaming tool call index assignment for multiple tool calls - [PR #14587](https://github.com/BerriAI/litellm/pull/14587)
+    - Fix load credentials in token counter proxy - [PR #14808](https://github.com/BerriAI/litellm/pull/14808)
+
+---
+
+## Management Endpoints / UI
+
+#### Features
+
+- **Proxy CLI Auth** 
+    - Allow re-using cli auth token - [PR #14780](https://github.com/BerriAI/litellm/pull/14780)
+    - Create a python method to login using litellm proxy - [PR #14782](https://github.com/BerriAI/litellm/pull/14782)
+    - Fixes for LiteLLM Proxy CLI to Auth to Gateway - [PR #14836](https://github.com/BerriAI/litellm/pull/14836)
+    
+**Virtual Keys**    
+    - Initial support for scheduled key rotations - [PR #14877](https://github.com/BerriAI/litellm/pull/14877)
+    - Allow scheduling key rotations when creating virtual keys - [PR #14960](https://github.com/BerriAI/litellm/pull/14960)
+
+**Models + Endpoints**
+    - Fix: added Oracle to provider's list - [PR #14835](https://github.com/BerriAI/litellm/pull/14835)
+
+
+#### Bugs
+
+- **SSO** - Fix: SSO "Clear" button writes empty values instead of removing SSO config - [PR #14826](https://github.com/BerriAI/litellm/pull/14826)
+- **Admin Settings** - Remove useful links from admin settings - [PR #14918](https://github.com/BerriAI/litellm/pull/14918)
+- **Management Routes** - Add /user/list to management routes - [PR #14868](https://github.com/BerriAI/litellm/pull/14868)
+---
+
+## Logging / Guardrail / Prompt Management Integrations
+
+#### Features
+
+- **[DataDog](../../docs/proxy/logging#datadog)**
+    - Logging - `datadog` callback Log message content w/o sending to datadog - [PR #14909](https://github.com/BerriAI/litellm/pull/14909)
+- **[Langfuse](../../docs/proxy/logging#langfuse)**
+    - Adding langfuse usage details for cached tokens - [PR #10955](https://github.com/BerriAI/litellm/pull/10955)
+- **[Opik](../../docs/proxy/logging#opik)**
+    - Improve opik integration code - [PR #14888](https://github.com/BerriAI/litellm/pull/14888)
+- **[SQS](../../docs/proxy/logging#sqs)**
+    - Error logging support for SQS Logger - [PR #14974](https://github.com/BerriAI/litellm/pull/14974)
+
+#### Guardrails
+
+- **LakeraAI v2 Guardrail** - Ensure exception is raised correctly - [PR #14867](https://github.com/BerriAI/litellm/pull/14867)
+- **Presidio Guardrail** - Support custom entity types in Presidio guardrail with Union[PiiEntityType, str] - [PR #14899](https://github.com/BerriAI/litellm/pull/14899)
+- **Noma Guardrail** - Add noma guardrail provider to ui - [PR #14415](https://github.com/BerriAI/litellm/pull/14415)
+
+#### Prompt Management
+
+- **BitBucket Integration** - Add BitBucket Integration for Prompt Management - [PR #14882](https://github.com/BerriAI/litellm/pull/14882)
+
+---
+
+## Spend Tracking, Budgets and Rate Limiting
+
+- **Service Tier Pricing** - Add service_tier based pricing support for openai (BOTH Service & Priority Support) - [PR #14796](https://github.com/BerriAI/litellm/pull/14796)
+- **Cost Tracking** - Show input, output, tool call cost breakdown in StandardLoggingPayload - [PR #14921](https://github.com/BerriAI/litellm/pull/14921)
+- **Parallel Request Limiter v3** 
+    - Ensure Lua scripts can execute on redis cluster - [PR #14968](https://github.com/BerriAI/litellm/pull/14968)
+    - Fix: get metadata info from both metadata and litellm_metadata fields - [PR #14783](https://github.com/BerriAI/litellm/pull/14783)
+- **Priority Reservation** - Fix: Priority Reservation: keys without priority metadata receive higher priority than keys with explicit priority configurations - [PR #14832](https://github.com/BerriAI/litellm/pull/14832)
+
+---
+
+## MCP Gateway
+
+- **MCP Configuration** - Enable custom fields in mcp_info configuration - [PR #14794](https://github.com/BerriAI/litellm/pull/14794)
+- **MCP Tools** - Remove server_name prefix from list_tools - [PR #14720](https://github.com/BerriAI/litellm/pull/14720)
+- **OAuth Flow** - Initial commit for v2 oauth flow - [PR #14964](https://github.com/BerriAI/litellm/pull/14964)
+
+---
+
+## Performance / Loadbalancing / Reliability improvements
+
+- **Memory Leak Fix** - Fix InMemoryCache unbounded growth when TTLs are set - [PR #14869](https://github.com/BerriAI/litellm/pull/14869)
+- **Cache Performance** - Fix: cache root cause - [PR #14827](https://github.com/BerriAI/litellm/pull/14827)
+- **Concurrency Fix** - Fix concurrency/scaling when many Python threads do streaming using *sync* completions - [PR #14816](https://github.com/BerriAI/litellm/pull/14816)
+- **Performance Optimization** - Fix: reduce get_deployment cost to O(1) - [PR #14967](https://github.com/BerriAI/litellm/pull/14967)
+- **Performance Optimization** - Fix: remove slow string operation - [PR #14955](https://github.com/BerriAI/litellm/pull/14955)
+- **DB Connection Management** - Fix: DB connection state retries - [PR #14925](https://github.com/BerriAI/litellm/pull/14925)
+
+
+
+---
+
+## Documentation Updates
+
+- **Provider Documentation** - Fix docs for provider_specific_params.md - [PR #14787](https://github.com/BerriAI/litellm/pull/14787)
+- **Model References** - Update model references from gemini-pro to gemini-2.5-pro - [PR #14775](https://github.com/BerriAI/litellm/pull/14775)
+- **Letta Guide** - Add Letta Guide documentation - [PR #14798](https://github.com/BerriAI/litellm/pull/14798)
+- **README** - Make the README document clearer - [PR #14860](https://github.com/BerriAI/litellm/pull/14860)
+- **Session Management** - Update docs for session management availability - [PR #14914](https://github.com/BerriAI/litellm/pull/14914)
+- **Cost Documentation** - Add documentation for additional cost-related keys in custom pricing - [PR #14949](https://github.com/BerriAI/litellm/pull/14949)
+- **Azure Passthrough** - Add azure passthrough documentation - [PR #14958](https://github.com/BerriAI/litellm/pull/14958)
+- **General Documentation** - Doc updates sept 2025 - [PR #14769](https://github.com/BerriAI/litellm/pull/14769)
+    - Clarified bridging between endpoints and mode in docs.
+    - Added Vertex AI Gemini API configuration as an alternative in relevant guides.
+    Linked AWS authentication info in the Bedrock guardrails documentation.
+    - Added Cancel Response API usage with code snippets
+    - Clarified that SSO (Single Sign-On) is free for up to 5 users:
+    - Alphabetized sidebar, leaving quick start / intros at top of categories
+    - Documented max_connections under cache_params.
+    - Clarified IAM AssumeRole Policy requirements.
+    - Added transform utilities example to Getting Started (showing request transformation).
+    - Added references to models.litellm.ai as the full models list in various docs.
+    - Added a code snippet for async_post_call_success_hook.
+    - Removed broken links to callbacks management guide. - Reformatted and linked cookbooks + other relevant docs
+- **Documentation Corrections** - Corrected docs updates sept 2025 - [PR #14916](https://github.com/BerriAI/litellm/pull/14916)
+
+---
+
+## New Contributors
+
+* @uzaxirr made their first contribution in [PR #14761](https://github.com/BerriAI/litellm/pull/14761)
+* @xprilion made their first contribution in [PR #14416](https://github.com/BerriAI/litellm/pull/14416)
+* @CH-GAGANRAJ made their first contribution in [PR #14779](https://github.com/BerriAI/litellm/pull/14779)
+* @otaviofbrito made their first contribution in [PR #14778](https://github.com/BerriAI/litellm/pull/14778)
+* @danielmklein made their first contribution in [PR #14639](https://github.com/BerriAI/litellm/pull/14639)
+* @Jetemple made their first contribution in [PR #14826](https://github.com/BerriAI/litellm/pull/14826)
+* @akshoop made their first contribution in [PR #14818](https://github.com/BerriAI/litellm/pull/14818)
+* @hazyone made their first contribution in [PR #14821](https://github.com/BerriAI/litellm/pull/14821)
+* @leventov made their first contribution in [PR #14816](https://github.com/BerriAI/litellm/pull/14816)
+* @fabriciojoc made their first contribution in [PR #10955](https://github.com/BerriAI/litellm/pull/10955)
+* @onlylonly made their first contribution in [PR #14845](https://github.com/BerriAI/litellm/pull/14845)
+* @Copilot made their first contribution in [PR #14869](https://github.com/BerriAI/litellm/pull/14869)
+* @arsh72 made their first contribution in [PR #14899](https://github.com/BerriAI/litellm/pull/14899)
+* @berri-teddy made their first contribution in [PR #14914](https://github.com/BerriAI/litellm/pull/14914)
+* @vpbill made their first contribution in [PR #14415](https://github.com/BerriAI/litellm/pull/14415)
+* @kgritesh made their first contribution in [PR #14893](https://github.com/BerriAI/litellm/pull/14893)
+* @oytunkutrup1 made their first contribution in [PR #14858](https://github.com/BerriAI/litellm/pull/14858)
+* @nherment made their first contribution in [PR #14933](https://github.com/BerriAI/litellm/pull/14933)
+* @deepanshululla made their first contribution in [PR #14974](https://github.com/BerriAI/litellm/pull/14974)
+* @TeddyAmkie made their first contribution in [PR #14758](https://github.com/BerriAI/litellm/pull/14758)
+* @SmartManoj made their first contribution in [PR #14775](https://github.com/BerriAI/litellm/pull/14775)
+* @uc4w6c made their first contribution in [PR #14720](https://github.com/BerriAI/litellm/pull/14720)
+* @luizrennocosta made their first contribution in [PR #14783](https://github.com/BerriAI/litellm/pull/14783)
+* @AlexsanderHamir made their first contribution in [PR #14827](https://github.com/BerriAI/litellm/pull/14827)
+* @dharamendrak made their first contribution in [PR #14721](https://github.com/BerriAI/litellm/pull/14721)
+* @TomeHirata made their first contribution in [PR #14164](https://github.com/BerriAI/litellm/pull/14164)
+* @mrFranklin made their first contribution in [PR #14860](https://github.com/BerriAI/litellm/pull/14860)
+* @luisfucros made their first contribution in [PR #14866](https://github.com/BerriAI/litellm/pull/14866)
+* @huangyafei made their first contribution in [PR #14879](https://github.com/BerriAI/litellm/pull/14879)
+* @thiswillbeyourgithub made their first contribution in [PR #14949](https://github.com/BerriAI/litellm/pull/14949)
+* @Maximgitman made their first contribution in [PR #14965](https://github.com/BerriAI/litellm/pull/14965)
+* @subnet-dev made their first contribution in [PR #14938](https://github.com/BerriAI/litellm/pull/14938)
+* @22mSqRi made their first contribution in [PR #14972](https://github.com/BerriAI/litellm/pull/14972)
+
+---
+
+## **[Full Changelog](https://github.com/BerriAI/litellm/compare/v1.77.3.rc.1...v1.77.5.rc.1)**