Best AI models for writing and copy
“Best AI for writing” is one of the strongest commercial queries in the niche (~4.4K/mo US on Semrush). This collection prioritizes tone, long-form coherence, and brief-following — not just cheap tokens.
Models in this collection
| Model | Type | Context | Price |
|---|---|---|---|
 Claude Sonnet 5Anthropic | Chat | 1M tokens | $3.2702/M in · $16.3509/M out |
 GPT-5.5OpenAI | Chat | 272k tokens | $5.4503/M in · $32.7018/M out |
 Gemini 2.5 ProGoogle | Chat | 2M tokens | $1.3626/M in · $10.9006/M out |
 Grok 4.3xAI | Chat | 1M tokens | $1.3626/M in · $2.7251/M out |
| Claude Opus 5Anthropic | Chat | 1M tokens | $5.4503/M in · $27.2515/M out |
| GPT-5.4 miniOpenAI | Chat | 272k tokens | $0.8175/M in · $4.9053/M out |
| Gemini 2.5 FlashGoogle | Chat | 1M tokens | $0.327/M in · $2.7251/M out |
 DeepSeek V4 ProDeepSeek | Chat | 1M tokens | $0.4742/M in · $0.9484/M out |
Why these models
Claude and GPT for prose; Gemini Pro for research+draft; Grok for a looser voice; Flash/mini for outlines and mass rewrites.
Use them with Geek Hub
One OpenAI-compatible base URL and API key. Swap any model id from this list without rewriting your client.
Get an API keyFAQ
- Good for SEO content?
- Yes as a draft. Brief + outline on Flash; long draft on Sonnet/GPT; human edit at the end.
- Spanish?
- Yes. Pair with Models for Spanish if the product is ES-first.
- Avoid robotic tone?
- Brand-voice system prompt + few-shot examples. Sonnet/Grok often sound less “corporate”.