Best open source LLMs
Open-weight models publish their trained weights, so you can download, self-host, fine-tune and run them without sending data to a third party. Licences vary — some are fully permissive, others restrict commercial use at scale — so check each model's terms.
The list below is drawn straight from the BotLineage database and ordered newest first. Newer releases generally beat older ones of the same size, and context windows have grown from a few thousand tokens to millions.
- 01
Llama 4
Apr 5, 2025 · 10M context · Open weightsMeta's Llama 4 MoE family with very long context and multimodal input.
- 02
DeepSeek R1
Jan 20, 2025 · 128K context · Open weightsOpen-weight reasoning model that popularized reinforcement-learned chain-of-thought at scale.
- 03
DeepSeek V3
Dec 26, 2024 · 128K context · Open weights671B MoE open-weight base model.
- 04
Llama 3
Apr 18, 2024 · 8.2K context · Open weights8B and 70B open-weight release, later extended to Llama 3.1 and 3.2 with vision.
- 05
Mixtral 8x7B
Dec 11, 2023 · 32K context · Open weightsSparse mixture-of-experts open-weight model from Mistral.
- 06
Grok-1
Nov 4, 2023 · 8.2K context · Open weightsFirst Grok model from xAI, later open-sourced.
- 07
Mistral 7B
Sep 27, 2023 · 8.2K context · Open weightsCompact 7B open-weight model that punched above its parameter count.
- 08
Llama 2
Jul 18, 2023 · 4.1K context · Open weightsFirst widely-licensed open-weight Llama release.
- 09
GPT-2
Feb 14, 2019 · 1.0K context · Open weightsSecond-generation GPT model, initially released with a staged rollout over safety concerns.
See also: LLM context window comparison · All comparisons