Political Even-handedness

Anthropic aims for Claude to achieve Political Even-handedness, treating diverse political perspectives with equal depth and quality without leaning toward any particular ideology. This is intended to help users form their own judgments and to prevent the AI from imposing or pushing particular opinions.

To ensure fairness, the following ideal behavioral guidelines are applied:

• Avoiding unsolicited political opinions and providing balanced information
• Maintaining factual accuracy and comprehensiveness
• Presenting the best arguments for each perspective (aiming to pass an Ideological Turing Test)
• Presenting multiple viewpoints on topics without consensus
• Using neutral terminology free of political bias

To implement this, system prompts are regularly updated, and character training is conducted to instill specific character traits in the model through reinforcement learning.

Anthropic developed a new automated evaluation method and conducted tests, finding that Claude Sonnet 4.5 showed higher even-handedness than GPT-5 and Llama 4, and performed similarly to Grok 4 and Gemini 2.5 Pro. This evaluation methodology will be open-sourced for the advancement of the AI industry as a whole.