Claude Opus 4.6 vs ChatGPT (GPT-4o)
Which AI writes best in 2026? Compare Claude and ChatGPT for long-form content, creative writing, marketing copy, and professional documents.
Long-form articles, reports, and professional content
Pricing (per 1M tokens)
Key Strengths
- Most natural, human-like writing quality
- Excellent at matching tone and style
- Handles long-form content with consistency
Claude Opus produces the most natural, human-like writing and excels at long-form content that requires consistency and nuance. ChatGPT is better for brainstorming, quick creative drafts, and marketing copy with its Custom GPT workflows. For professional writing quality, Claude is the clear winner; for creative ideation and rapid iteration, ChatGPT edges ahead.
Quick Comparison
| Feature | Claude Opus 4.6 | ChatGPT (GPT-4o) |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price / 1M tokens | $15 | $5 |
| Output Price / 1M tokens | $75 | $15 |
| Context Window | 200K | 128K |
| Best For | Long-form articles, reports, and professional content | Creative content, marketing copy, and brainstorming |
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Disclaimer: Prices and features current as of February 2026. Check provider websites for latest pricing. Actual costs may vary based on usage tier, commitment discounts, and regional availability.