---
title: "v1.77.3-stable - Priority Based Rate Limiting"
slug: "v1-77-3"
date: 2025-09-21T10:00:00
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
``` showLineNumbers title="docker run litellm"
docker run \
-e STORE_MODEL_IN_DB=True \
-p 4000:4000 \
docker.litellm.ai/berriai/litellm:v1.77.3-stable
```
``` showLineNumbers title="pip install litellm"
pip install litellm==1.77.3
```
---
## Key Highlights
- **+550 RPS Performance Improvements** - Optimizations in request handling and object initialization.
- **Priority Quota Reservation** - Proxy admins can now reserve TPM/RPM capacity for specific keys.
## Priority Quota Reservation
This release adds support for priority quota reservation. This allows Proxy Admins to reserve specific percentages of model capacity for different use cases.
This is great for use cases where you want to ensure your realtime use cases must always get priority responses and background development jobs can take longer.
This release adds support for priority quota reservation. This allows **Proxy Admins** to reserve TPM/RPM capacity for keys based on metadata priority levels, ensuring critical production workloads get guaranteed access regardless of development traffic volume.
Get started [here](../../docs/proxy/dynamic_rate_limit#priority-quota-reservation)
## +550 RPS Performance Improvements
This release delivers significant RPS improvements through targeted optimizations.
We've achieved a +500 RPS boost by fixing cache type inconsistencies that were causing frequent cache misses, plus an additional +50 RPS by removing unnecessary coroutine checks from the hot path.
## New Models / Updated Models
#### New Model Support
| Provider | Model | Context Window | Input ($/1M tokens) | Output ($/1M tokens) | Features |
| -------- | ----- | -------------- | ------------------- | -------------------- | -------- |
| SambaNova | `sambanova/deepseek-v3.1` | 128K | $0.90 | $0.90 | Chat completions |
| SambaNova | `sambanova/gpt-oss-120b` | 128K | $0.72 | $0.72 | Chat completions |
| OVHCloud | Various models | Varies | Contact provider | Contact provider | Chat completions |
| CompactifAI | Various models | Varies | Contact provider | Contact provider | Chat completions |
| TwelveLabs | `twelvelabs/marengo-embed-2.7` | 32K | $0.12 | $0.00 | Embeddings |
#### Features
- **[OVHCloud AI Endpoints](../../docs/providers/ovhcloud)**
- New provider support with comprehensive model catalog - [PR #14494](https://github.com/BerriAI/litellm/pull/14494)
- **[CompactifAI](../../docs/providers/compactifai)**
- New provider integration - [PR #14532](https://github.com/BerriAI/litellm/pull/14532)
- **[SambaNova](../../docs/providers/sambanova)**
- Added DeepSeek v3.1 and GPT-OSS-120B models - [PR #14500](https://github.com/BerriAI/litellm/pull/14500)
- **[Bedrock](../../docs/providers/bedrock)**
- Cross-region inference profile cost calculation - [PR #14566](https://github.com/BerriAI/litellm/pull/14566)
- AWS external ID parameter support for authentication - [PR #14582](https://github.com/BerriAI/litellm/pull/14582)
- CountTokens API implementation - [PR #14557](https://github.com/BerriAI/litellm/pull/14557)
- Titan V2 encoding_format parameter support - [PR #14687](https://github.com/BerriAI/litellm/pull/14687)
- Nova Canvas image generation inference profiles - [PR #14578](https://github.com/BerriAI/litellm/pull/14578)
- Bedrock Batches API - batch processing support with file upload and request transformation - [PR #14618](https://github.com/BerriAI/litellm/pull/14618)
- Bedrock Twelve Labs embedding provider support - [PR #14697](https://github.com/BerriAI/litellm/pull/14697)
- **[Vertex AI](../../docs/providers/vertex)**
- Gemini labels field provider-aware filtering - [PR #14563](https://github.com/BerriAI/litellm/pull/14563)
- Gemini Batch API support - [PR #14733](https://github.com/BerriAI/litellm/pull/14733)
- **[Volcengine](../../docs/providers/volcengine)**
- Fixed thinking parameters when disabled - [PR #14569](https://github.com/BerriAI/litellm/pull/14569)
- **[Cohere](../../docs/providers/cohere)**
- Handle Generate API deprecation, default to chat endpoints - [PR #14676](https://github.com/BerriAI/litellm/pull/14676)
- **[TwelveLabs](../../docs/providers/twelvelabs)**
- Added Marengo Embed 2.7 embedding support - [PR #14674](https://github.com/BerriAI/litellm/pull/14674)
### Bug Fixes
- **[Bedrock](../../docs/providers/bedrock)**
- Empty arguments handling in tool call invocation - [PR #14583](https://github.com/BerriAI/litellm/pull/14583)
- **[Vertex AI](../../docs/providers/vertex)**
- Avoid deepcopy crash with non-pickleables in Gemini/Vertex - [PR #14418](https://github.com/BerriAI/litellm/pull/14418)
- **[XAI](../../docs/providers/xai)**
- Fix unsupported stop parameter for grok-code models - [PR #14565](https://github.com/BerriAI/litellm/pull/14565)
- **[Gemini](../../docs/providers/gemini)**
- Updated error message for Gemini API - [PR #14589](https://github.com/BerriAI/litellm/pull/14589)
- Fixed 2.5 Flash Image Preview model routing - [PR #14715](https://github.com/BerriAI/litellm/pull/14715)
- API key passing for token counting endpoints - [PR #14744](https://github.com/BerriAI/litellm/pull/14744)
#### New Provider Support
- **[OVHCloud AI Endpoints](../../docs/providers/ovhcloud)**
- Complete provider integration with model catalog and authentication - [PR #14494](https://github.com/BerriAI/litellm/pull/14494)
- **[CompactifAI](../../docs/providers/compactifai)**
- New provider support with documentation - [PR #14532](https://github.com/BerriAI/litellm/pull/14532)
---
## LLM API Endpoints
#### Features
- **[/responses](../../docs/response_api)**
- Added cancel endpoint support for non-admin users - [PR #14594](https://github.com/BerriAI/litellm/pull/14594)
- Improved response session handling and cold storage configuration with s3 - [PR #14534](https://github.com/BerriAI/litellm/pull/14534)
- Added OpenAI & Azure /responses/cancel endpoint support - [PR #14561](https://github.com/BerriAI/litellm/pull/14561)
- **General**
- Enhanced rate limit error messages with details - [PR #14736](https://github.com/BerriAI/litellm/pull/14736)
- Middle-truncation for spend log payloads - [PR #14637](https://github.com/BerriAI/litellm/pull/14637)
#### Bugs
- **[/chat/completions](../../docs/completion/input)**
- Fixed completion chat ID handling - [PR #14548](https://github.com/BerriAI/litellm/pull/14548)
- Prevent AttributeError for _get_tags_from_request_kwargs - [PR #14735](https://github.com/BerriAI/litellm/pull/14735)
- **[/responses](../../docs/response_api)**
- Fixed cost calculation - [PR #14675](https://github.com/BerriAI/litellm/pull/14675)
- **General**
- Rate limiter AttributeError fix - [PR #14609](https://github.com/BerriAI/litellm/pull/14609)
---
## Spend Tracking, Budgets and Rate Limiting
- **Responses API Cost Calculation** fix - [PR #14675](https://github.com/BerriAI/litellm/pull/14675)
- **Anthropic Cache Token Pricing** - Separate 1-hour vs 5-minute cache creation costs - [PR #14620](https://github.com/BerriAI/litellm/pull/14620), [PR #14652](https://github.com/BerriAI/litellm/pull/14652)
- **Indochina Time Timezone** support for budget resets - [PR #14666](https://github.com/BerriAI/litellm/pull/14666)
- **Soft Budget Alert Cache Issues** - Resolved soft budget alert cache issues - [PR #14491](https://github.com/BerriAI/litellm/pull/14491)
- **Dynamic Rate Limiter v3** - Priority routing improvements - [PR #14734](https://github.com/BerriAI/litellm/pull/14734)
- **Enhanced Rate Limit Errors** - More detailed error messages - [PR #14736](https://github.com/BerriAI/litellm/pull/14736)
---
## Management Endpoints / UI
#### Features
- **Team Member Service Account Keys** - Allow team members to view keys they create - [PR #14619](https://github.com/BerriAI/litellm/pull/14619)
- **Default Budget for JWT Teams** - Auto-assign budgets to generated teams - [PR #14514](https://github.com/BerriAI/litellm/pull/14514)
- **SSO Access Control Groups** - Enhanced token info endpoint integration - [PR #14738](https://github.com/BerriAI/litellm/pull/14738)
- **Health Test Connect Protection** - Restrict access based on model creation permissions - [PR #14650](https://github.com/BerriAI/litellm/pull/14650)
- **Amazon Bedrock Guardrail Info View** - Enhanced logging visualization - [PR #14696](https://github.com/BerriAI/litellm/pull/14696)
#### Bug Fixes
- **SCIM v2** - Fix group PUSH and PUT operations for non-existent members - [PR #14581](https://github.com/BerriAI/litellm/pull/14581)
- **Guardrail View/Edit/Delete** behavior fixes - [PR #14622](https://github.com/BerriAI/litellm/pull/14622)
- **In-Memory Guardrail** update failures - [PR #14653](https://github.com/BerriAI/litellm/pull/14653)
---
## Logging / Guardrail Integrations
#### Features
- **[DataDog](../../docs/proxy/logging#datadog)**
- Enhanced spend tracking metrics - [PR #14555](https://github.com/BerriAI/litellm/pull/14555)
- Stream support with is_streamed_request parameter - [PR #14673](https://github.com/BerriAI/litellm/pull/14673)
- Fixed tool calls metadata passing - [PR #14531](https://github.com/BerriAI/litellm/pull/14531)
- **[Langfuse](../../docs/proxy/logging#langfuse)**
- Added logging support for Responses API - [PR #14597](https://github.com/BerriAI/litellm/pull/14597)
- **[Langsmith](../../docs/proxy/logging#langsmith)**
- Langsmith Sampling Rate - Key/Team-level tracing configuration - [PR #14740](https://github.com/BerriAI/litellm/pull/14740)
- **[Prometheus](../../docs/proxy/logging#prometheus)**
- Multi-worker support improvements - [PR #14530](https://github.com/BerriAI/litellm/pull/14530)
- User email labels in monitoring - [PR #14520](https://github.com/BerriAI/litellm/pull/14520)
- **[Opik](../../docs/proxy/logging#opik)**
- Fixed timezone issue - [PR #14708](https://github.com/BerriAI/litellm/pull/14708)
### Bug Fixes
- **[S3](../../docs/proxy/logging#s3-buckets)**
- Fixed 404 error when using s3_endpoint_url - [PR #14559](https://github.com/BerriAI/litellm/pull/14559)
#### Guardrails
- **Tool Permission Guardrail** - Fine-grained tool access control - [PR #14519](https://github.com/BerriAI/litellm/pull/14519)
- **Bedrock Guardrails** - Selective guarding support with runtime endpoint configuration - [PR #14575](https://github.com/BerriAI/litellm/pull/14575), [PR #14650](https://github.com/BerriAI/litellm/pull/14650)
- **Default Last Message** in guardrails - [PR #14640](https://github.com/BerriAI/litellm/pull/14640)
- **AWS exceptions handling despite 200 response** - [PR #14658](https://github.com/BerriAI/litellm/pull/14658)
#### New Integration
- **[PostHog](../../docs/observability/posthog)** - Complete observability integration for LiteLLM usage tracking and analytics - [PR #14610](https://github.com/BerriAI/litellm/pull/14610)
---
## MCP Gateway
- **MCP Server Alias Parsing** - Multi-part URL path support - [PR #14558](https://github.com/BerriAI/litellm/pull/14558)
- **MCP Filter Recomputation** - After server deletion - [PR #14542](https://github.com/BerriAI/litellm/pull/14542)
- **MCP Gateway Tools List** improvements - [PR #14695](https://github.com/BerriAI/litellm/pull/14695)
---
## Performance / Loadbalancing / Reliability improvements
- **+500 RPS Performance Boost** when sending the `user` field - [PR #14616](https://github.com/BerriAI/litellm/pull/14616)
- **+50 RPS** by removing iscoroutine from hot path - [PR #14649](https://github.com/BerriAI/litellm/pull/14649)
- **7% reduction** in __init__ overhead - [PR #14689](https://github.com/BerriAI/litellm/pull/14689)
- **Generic Object Pool** implementation for better resource management - [PR #14702](https://github.com/BerriAI/litellm/pull/14702)
---
## General Proxy Improvements
- **Middle-Truncation** for spend log payloads - [PR #14637](https://github.com/BerriAI/litellm/pull/14637)
#### Security
- **Security Update** - Bump aiohttp==3.12.14, fix CVE-2025-53643 - [PR #14638](https://github.com/BerriAI/litellm/pull/14638)
---
## New Contributors
* @luisfucros made their first contribution in [PR #14500](https://github.com/BerriAI/litellm/pull/14500)
* @hanakannzashi made their first contribution in [PR #14548](https://github.com/BerriAI/litellm/pull/14548)
* @eliasto made their first contribution in [PR #14494](https://github.com/BerriAI/litellm/pull/14494)
* @Rasmusafj made their first contribution in [PR #14491](https://github.com/BerriAI/litellm/pull/14491)
* @LingXuanYin made their first contribution in [PR #14569](https://github.com/BerriAI/litellm/pull/14569)
* @ronaldpereira made their first contribution in [PR #14613](https://github.com/BerriAI/litellm/pull/14613)
* @hula-la made their first contribution in [PR #14534](https://github.com/BerriAI/litellm/pull/14534)
* @carlos-marchal-ph made their first contribution in [PR #14610](https://github.com/BerriAI/litellm/pull/14610)
* @akraines made their first contribution in [PR #14637](https://github.com/BerriAI/litellm/pull/14637)
* @mrFranklin made their first contribution in [PR #14708](https://github.com/BerriAI/litellm/pull/14708)
* @tcx4c70 made their first contribution in [PR #14675](https://github.com/BerriAI/litellm/pull/14675)
* @michaeltansg made their first contribution in [PR #14666](https://github.com/BerriAI/litellm/pull/14666)
* @tosi29 made their first contribution in [PR #14725](https://github.com/BerriAI/litellm/pull/14725)
* @gmdfalk made their first contribution in [PR #14735](https://github.com/BerriAI/litellm/pull/14735)
* @FelipeRodriguesGare made their first contribution in [PR #14733](https://github.com/BerriAI/litellm/pull/14733)
* @mritunjaysharma394 made their first contribution in [PR #14678](https://github.com/BerriAI/litellm/pull/14678)
---
## **[Full Changelog](https://github.com/BerriAI/litellm/compare/v1.77.2.rc.1...v1.77.3.rc.1)**