Hermes 4 405B

A 405-billion parameter reasoning model based on Llama 3.1 that can choose between direct answers and extended internal deliberation modes.

Strengths

Excels at complex reasoning tasks where it can allocate compute by deciding when extended deliberation helps versus when direct responses suffice.

Best for

Technical problem-solving, mathematical reasoning, and multi-step logic chains where the model can benefit from flexible reasoning depth.

Limitations

The hybrid reasoning approach requires careful prompt engineering to work effectively, and deliberation mode adds latency on tasks that don't need it.