Best LLM API for content writing
Long-form writing generates a lot of output tokens relative to the prompt, so the output rate matters most. Balanced-tier models, sorted by output price ascending.
Content writing — drafts, marketing copy, long-form articles — is output-heavy: you send a relatively short brief and the model generates the bulk of the tokens in its response, so output price usually drives your cost per piece. This list filters to our balanced-tier models, sorted by output price ascending.
| Model | Provider | Input /1M | Output /1M | Context |
|---|---|---|---|---|
| xAI | $1.25 | $2.50 | 1M tokens | |
| $0.75 | $3.75 | Not published | ||
| Alibaba | $2.00 | $6.00 | 1M tokens | |
| Mistral | $1.50 | $7.50 | Not published | |
| Anthropic | $2.00 | $10.00 | 1M tokens | |
| Amazon | $1.25 | $10.00 | Not published (preview) | |
| Cohere | $2.50 | $10.00 | 256K tokens | |
| OpenAI | $2.00 | $12.00 | ~1.05M tokens | |
| OpenAI | $4.00 | $20.00 | ~1.05M tokens |
We don't benchmark task-specific quality — this shortlist is built from verified price and published context window only. Use it to narrow candidates by cost, then evaluate output quality yourself.
Frequently asked questions
It's a starting point, not a rule: balanced-tier models sit between simple-task budget models and top-of-line flagship pricing. Test a budget model on your specific brief too — for shorter content it may perform well for less.
A typical writing prompt is usually much shorter than the finished piece it produces, so the output tokens — the actual draft — make up most of what you're billed for.
Yes, roughly — output price is per token generated, so a 2,000-word draft costs roughly twice what a 1,000-word draft does at the same rate. Setting a clear length target is a direct lever on cost.