Claude.
Long-context writing, careful reasoning, structured XML prompts, strong instruction following.
Anthropic · ~200,000 context
Strengths
Long-context writing, careful reasoning, structured XML prompts, strong instruction following.
Watch for
Can be conservative on creative leaps; quality and limits vary by Opus/Sonnet/Haiku tier.
Prompting
Prefer XML-delimited role, objective, constraints, and output_format. Multishot examples help.
Primary sources