Selection guide
What is the best open-source LLM?
There is no universal winner. Pick a model family, then evaluate the exact checkpoint against your real task, output contract, deployment budget, and license constraints.
A useful first shortlist
Qwen
Fine-tuned workflow models · Structured outputs · Cost-sensitive production inference
DeepSeek
Large-model coding and reasoning evaluations · Teams comparing Qwen against a larger candidate
Llama
A broadly supported baseline · Fine-tuning workflows · Teams with existing Llama infrastructure
Mistral
European model-vendor option · Task-specific shortlists · Teams that need to compare license terms
Gemma
Small-model experiments · Hardware-constrained deployment · A Google-family baseline
Don’t pick from a leaderboard alone.
A good choice meets your quality bar with valid outputs, acceptable latency, a workable license, and a cost you can own. That requires a task-specific evaluation.
Google Ads Keyword Planner: “best open source llm” has 1,900 monthly searches in the United States.
Benchmark status
Oumi benchmarks are pending. We’ll add a sourced comparison table after Stefan publishes the evaluation data and methodology.