- Python 71.5%
- TypeScript 22.7%
- Shell 1.9%
- PowerShell 1.6%
- Rust 1.5%
- Other 0.7%
Round 4 expansion driven by direct fetches of the canonical
SamplingParams + server README pages cited in the user's request.
Adds ten more knobs the docs explicitly support but the panel doesn't
surface yet:
Knob (wire name) llama.cpp vLLM Ollama Source
----------------------------- ---------- ------ -------- ----------------
skip_special_tokens no yes no vLLM SamplingParams
spaces_between_special_tokens no yes no vLLM SamplingParams
include_stop_str_in_output no yes no vLLM SamplingParams
truncate_prompt_tokens no yes no vLLM SamplingParams
n_keep yes no no llama.cpp README
n_probs yes no no llama.cpp README
cache_prompt yes no no llama.cpp README
return_tokens yes no no llama.cpp README
timings_per_token yes no no llama.cpp README
post_sampling_probs yes no no llama.cpp README
Backend rationale:
- vLLM's documented SamplingParams class at
https://docs.vllm.ai/en/latest/api/vllm/sampling_params/ lists
skip_special_tokens (default True), spaces_between_special_tokens
(True), include_stop_str_in_output (False), truncate_prompt_tokens
(None). All four are vLLM-only; llama-server's README does not
document them and Ollama's openai/openai.go translator does not
forward them.
- llama-server's README at
https://github.com/ggml-org/llama.cpp/blob/master/tools/server/README.md
lists n_keep, n_probs, cache_prompt, return_tokens, timings_per_token
and post_sampling_probs as documented per-request fields. vLLM's
SamplingParams has no analog, and Ollama's OAI translator drops them.
Capability matrix:
LLAMA_CPP_CAPABILITIES: 6 llama-only true + 4 vLLM-only false.
VLLM_CAPABILITIES: 4 vLLM-only true + 6 llama-only false.
OLLAMA_CAPABILITIES: all 10 off (OAI translator drops all of them).
Every other bucket: all 10 off.
Skip-when-default rules (mirror upstream defaults):
skip_special_tokens / spaces_between_special_tokens / cache_prompt:
default true upstream — forward only when explicitly false.
include_stop_str_in_output / return_tokens / timings_per_token /
post_sampling_probs: default false — forward only when true.
truncate_prompt_tokens / n_probs: 0 / null = unset — forward when > 0.
n_keep: accepts -1 for "keep all", so the gate is value != 0.
Frontend:
- ProviderCapabilities interface +10 flags.
- InferenceParams +10 nullable fields (3 numeric + 7 boolean), all
null in DEFAULT_INFERENCE_PARAMS.
- OpenAIChatCompletionsRequest wire shape +10 optional fields.
- chat-adapter forwards each in both the external (capability-aware)
and local (capability-bypass) branches.
- chat-settings-storage adds the 3 numeric keys to the existing
nullable-number loop and 7 boolean keys to a new nullable-boolean
loop (alongside ignoreEos).
Backend:
- ChatCompletionRequest +10 Optional Fields with pydantic bounds
(truncate_prompt_tokens ge=1, n_probs ge=0; booleans unbounded;
n_keep accepts -1 so no lower bound).
- llama_cpp.py three payload builders (generate_chat_stream + the
tool-loop payload block + the final-pass stream_payload) each
accept and forward the 10 new kwargs.
- routes/inference.py _build_passthrough_payload accepts and forwards
the 10; both per-request call sites (lines ~2591, ~2790) thread
them from the request payload into the llama_cpp methods.
Test: test_local_passthrough_forwards_vllm_output_and_llama_cpp_
instrumentation round-trips all 10 fields with explicit values
matching each backend's upstream default and confirms each is absent
from the body when unset.
65/65 sampling_params_routing tests pass; frontend tsc clean.
Total local-backend knob coverage now (this PR):
Standard: temperature, top_p, top_k, min_p, repetition_penalty,
presence_penalty, frequency_penalty, seed, stop,
parallel_tool_calls (10)
llama.cpp: typical_p, top_n_sigma, repeat_last_n, dynatemp_range,
dynatemp_exponent, mirostat, mirostat_tau, mirostat_eta,
dry_multiplier, dry_base, dry_allowed_length,
dry_penalty_last_n, xtc_probability, xtc_threshold,
min_keep, ignore_eos, min_tokens, n_keep, n_probs,
cache_prompt, return_tokens, timings_per_token,
post_sampling_probs (23)
vLLM-extra: ignore_eos, min_tokens, skip_special_tokens,
spaces_between_special_tokens, include_stop_str_in_output,
truncate_prompt_tokens (6)
OpenRouter: top_a (1)
Deferred for future PRs (require array / object field shape):
- llama.cpp DRY sequence_breakers (string array)
- llama.cpp samplers ordering (string array)
- llama.cpp / vLLM logit_bias (dict)
- llama.cpp grammar (string) + json_schema (object)
- vLLM guided_json / guided_regex / guided_choice / guided_grammar
- vLLM allowed_token_ids / bad_words / stop_token_ids (int / str arrays)
- OpenAI / Ollama logprobs + top_logprobs (bool + int pairing)
- n / best_of (need SSE multi-choice handling first)
|
||
|---|---|---|
| .github | ||
| images | ||
| scripts | ||
| studio | ||
| tests | ||
| unsloth | ||
| unsloth_cli | ||
| .gitattributes | ||
| .gitignore | ||
| .pre-commit-ci.yaml | ||
| .pre-commit-config.yaml | ||
| build.sh | ||
| cli.py | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| install.ps1 | ||
| install.sh | ||
| LICENSE | ||
| pyproject.toml | ||
| README.md | ||
| unsloth-cli.py | ||
Unsloth Studio lets you run and train models locally.
Features • Quickstart • Notebooks • Documentation
⚡ Get started
macOS, Linux, WSL:
curl -fsSL https://unsloth.ai/install.sh | sh
Windows:
irm https://unsloth.ai/install.ps1 | iex
Community:
⭐ Features
Unsloth Studio (Beta) lets you run and train text, audio, embedding, vision models on Windows, Linux and macOS.
Inference
- Search + download + run models including GGUF, LoRA adapters, safetensors
- Export models: Save or export models to GGUF, 16-bit safetensors and other formats.
- Tool calling: Support for self-healing tool calling and web search
- Code execution: lets LLMs test code in Claude artifacts and sandbox environments
- API inference endpoint: Deploy and run local LLMs in Claude Code, Codex tools with Unsloth
- Auto set inference settings and customize chat templates.
- We work directly with teams behind gpt-oss, Qwen3, Llama 4, Mistral, Gemma 1-3, and Phi-4, where we’ve fixed bugs that improve model accuracy.
- Chat with images, audio, PDFs, code, DOCX and more. Connect API providers (OpenAI, Anthropic) or servers (vLLM, Ollama).
Training
- Train and RL 500+ models up to 2x faster with up to 70% less VRAM, with no accuracy loss.
- Custom Triton and mathematical kernels. See some collabs we did with PyTorch and Hugging Face.
- Data Recipes: Auto-create datasets from PDF, CSV, DOCX etc. Edit data in a visual-node workflow.
- Reinforcement Learning (RL): The most efficient RL library, using 80% less VRAM for GRPO, FP8 etc.
- Supports full fine-tuning, RL, pretraining, 4-bit, 16-bit and, FP8 training.
- Observability: Monitor training live, track loss and GPU usage and customize graphs.
- Multi-GPU training is supported, with major improvements coming soon.
📥 Install
Unsloth can be used in two ways: through Unsloth Studio, the web UI, or through Unsloth Core, the code-based version. Each has different requirements.
Unsloth Studio (web UI)
Unsloth Studio (Beta) works on Windows, Linux, WSL and macOS.
- CPU: Supported for Chat and Data Recipes currently
- NVIDIA: Training works on RTX 30/40/50, Blackwell, DGX Spark, Station and more
- macOS: Training, MLX and GGUF inference are ALL supported.
- AMD: Chat + Data works. Train with Unsloth Core. Studio support is out soon.
- Multi-GPU: Available now, with a major upgrade on the way
macOS, Linux, WSL:
curl -fsSL https://unsloth.ai/install.sh | sh
Windows:
irm https://unsloth.ai/install.ps1 | iex
Launch
unsloth studio -p 8888
For cloud or global access, add -H 0.0.0.0. By default, Unsloth is accessible only locally.
Update
To update, use the same install commands above or use unsloth studio update.
Docker
Use our Docker image unsloth/unsloth container. Run:
docker run -d -e JUPYTER_PASSWORD="mypassword" \
-p 8888:8888 -p 8000:8000 -p 2222:22 \
-v $(pwd)/work:/workspace/work \
--gpus all \
unsloth/unsloth
Developer, Nightly, Uninstall
To see developer, nightly and uninstallation etc. instructions, see advanced installation.
Unsloth Core (code-based)
Linux, WSL:
curl -LsSf https://astral.sh/uv/install.sh | sh
uv venv unsloth_env --python 3.13
source unsloth_env/bin/activate
uv pip install unsloth --torch-backend=auto
Windows:
winget install -e --id Python.Python.3.13
winget install --id=astral-sh.uv -e
uv venv unsloth_env --python 3.13
.\unsloth_env\Scripts\activate
uv pip install unsloth --torch-backend=auto
For Windows, pip install unsloth works only if you have PyTorch installed. Read our Windows Guide.
You can use the same Docker image as Unsloth Studio.
AMD, Intel:
For RTX 50x, B200, 6000 GPUs: uv pip install unsloth --torch-backend=auto. Read our guides for: Blackwell and DGX Spark.
To install Unsloth on AMD and Intel GPUs, follow our AMD Guide and Intel Guide.
📒 Free Notebooks
Train for free with our notebooks. You can use our new free Unsloth Studio notebook to run and train models for free in a web UI. Read our guide. Add dataset, run, then deploy your trained model.
| Model | Free Notebooks | Performance | Memory use |
|---|---|---|---|
| Gemma 4 (E2B) | ▶️ Start for free | 1.5x faster | 50% less |
| Qwen3.5 (4B) | ▶️ Start for free | 1.5x faster | 60% less |
| gpt-oss (20B) | ▶️ Start for free | 2x faster | 70% less |
| Qwen3.5 GSPO | ▶️ Start for free | 2x faster | 70% less |
| gpt-oss (20B): GRPO | ▶️ Start for free | 2x faster | 80% less |
| Qwen3: Advanced GRPO | ▶️ Start for free | 2x faster | 70% less |
| embeddinggemma (300M) | ▶️ Start for free | 2x faster | 20% less |
| Mistral Ministral 3 (3B) | ▶️ Start for free | 1.5x faster | 60% less |
| Llama 3.1 (8B) Alpaca | ▶️ Start for free | 2x faster | 70% less |
| Llama 3.2 Conversational | ▶️ Start for free | 2x faster | 70% less |
| Orpheus-TTS (3B) | ▶️ Start for free | 1.5x faster | 50% less |
- See all our notebooks for: Kaggle, GRPO, TTS, embedding & Vision
- See all our models and all our notebooks
- See detailed documentation for Unsloth here
🦥 Unsloth News
- Connections: Connect any API provider (OpenAI, Anthropic) or server (vLLM, Ollama). Guide
- MTP: Run Qwen3.6 MTP in Unsloth. MTP settings are autoset specific to your hardware. Guide
- API inference endpoint: Deploy and run local LLMs in Claude Code, Codex tools. Guide
- Qwen3.6: Qwen3.6-35B-A3B can now be trained and run in Unsloth Studio. Blog
- Gemma 4: Run and train Google’s new models directly in Unsloth. Blog
- Introducing Unsloth Studio: our new web UI for running and training LLMs. Blog
- Qwen3.5 - 0.8B, 2B, 4B, 9B, 27B, 35-A3B, 112B-A10B are now supported. Guide + notebooks
- Train MoE LLMs 12x faster with 35% less VRAM - DeepSeek, GLM, Qwen and gpt-oss. Blog
- Embedding models: Unsloth now supports ~1.8-3.3x faster embedding fine-tuning. Blog • Notebooks
- New 7x longer context RL vs. all other setups, via our new batching algorithms. Blog
- New RoPE & MLP Triton Kernels & Padding Free + Packing: 3x faster training & 30% less VRAM. Blog
- 500K Context: Training a 20B model with >500K context is now possible on an 80GB GPU. Blog
- FP8 & Vision RL: You can now do FP8 & VLM GRPO on consumer GPUs. FP8 Blog • Vision RL
📥 Advanced Installation
The below advanced instructions are for Unsloth Studio. For Unsloth Core advanced installation, view our docs.
Developer installs: macOS, Linux, WSL:
git clone https://github.com/unslothai/unsloth
cd unsloth
./install.sh --local
unsloth studio -p 8888
Then to update :
unsloth studio update
Developer installs: Windows PowerShell:
git clone https://github.com/unslothai/unsloth.git
cd unsloth
Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
.\install.ps1 --local
unsloth studio -p 8888
Then to update :
unsloth studio update
Nightly: MacOS, Linux, WSL:
git clone https://github.com/unslothai/unsloth
cd unsloth
git checkout nightly
./install.sh --local
unsloth studio -p 8888
Then to launch every time:
unsloth studio -p 8888
Nightly: Windows:
Run in Windows Powershell:
git clone https://github.com/unslothai/unsloth.git
cd unsloth
git checkout nightly
Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
.\install.ps1 --local
unsloth studio -p 8888
Then to launch every time:
unsloth studio -p 8888
Uninstall
The recommended way to fully remove Unsloth Studio is the matching uninstall script for your OS. It stops any running servers, removes the install dir, the launcher data dir, the desktop shortcut, and any platform-specific entries (macOS .app bundle + Launch Services on Mac; Start Menu, HKCU\Software\Unsloth registry key and user PATH entries on Windows):
- MacOS, WSL, Linux:
curl -fsSL https://raw.githubusercontent.com/unslothai/unsloth/main/scripts/uninstall.sh | sh - Windows (PowerShell):
irm https://raw.githubusercontent.com/unslothai/unsloth/main/scripts/uninstall.ps1 | iex
If you only want to drop the install dir and keep the launcher/shortcut for a later reinstall, you can instead run rm -rf ~/.unsloth/studio (Mac/Linux/WSL) or Remove-Item -Recurse -Force "$HOME\.unsloth\studio" (Windows). The model cache at ~/.cache/huggingface is not touched by any of these.
For more info, see our docs.
Deleting model files
You can delete old model files either from the bin icon in model search or by removing the relevant cached model folder from the default Hugging Face cache directory. By default, HF uses:
- MacOS, Linux, WSL:
~/.cache/huggingface/hub/ - Windows:
%USERPROFILE%\.cache\huggingface\hub\
💚 Community and Links
| Type | Links |
|---|---|
| Join Discord server | |
| Join Reddit community | |
| 📚 Documentation & Wiki | Read Our Docs |
| Follow us on X | |
| 🔮 Our Models | Unsloth Catalog |
| ✍️ Blog | Read our Blogs |
Citation
You can cite the Unsloth repo as follows:
@software{unsloth,
author = {Daniel Han, Michael Han and Unsloth team},
title = {Unsloth},
url = {https://github.com/unslothai/unsloth},
year = {2023}
}
If you trained a model with 🦥Unsloth, you can use this cool sticker!
License
Unsloth uses a dual-licensing model of Apache 2.0 and AGPL-3.0. The core Unsloth package remains licensed under Apache 2.0, while certain optional components, such as the Unsloth Studio UI are licensed under the open-source license AGPL-3.0.
This structure helps support ongoing Unsloth development while keeping the project open source and enabling the broader ecosystem to continue growing.
Thank You to
- The llama.cpp library that lets users run and save models with Unsloth
- The Hugging Face team and their libraries: transformers and TRL
- The Pytorch and Torch AO team for their contributions
- NVIDIA for their NeMo DataDesigner library and their contributions
- And of course for every single person who has contributed or has used Unsloth!