Llama 3.1 405B
Meta's largest open-source model, competing directly with proprietary frontier models. Llama 3.1 405B can be self-hosted and fine-tuned, offering unmatched flexibility for organisations with data privacy requirements.
You might also consider
OpenAI's most powerful reasoning model, using extended chain-of-thought to tackle the hardest problems in mathematics, science, and coding. o3 sets new standards on GPQA and competitive maths at the cost of higher latency and price.
Anthropic's most powerful and intelligent model, built for the most demanding tasks where quality outweighs cost. Claude Opus 4 leads on complex multi-step reasoning, graduate-level science, and nuanced long-form writing.
The latest and most capable Sonnet model to date. Claude Sonnet 4.6 brings further gains in mathematical reasoning and instruction following, making it Anthropic's most well-rounded model at the Sonnet price point.