Best LLM for Content Writing
For blog posts, marketing copy and general writing, most modern models are fluent enough that readers can't tell which one wrote the draft. That makes writing a value play, not a quality play.
Best value pick
Step 3.5 Flash
StepFun · Overall Arena 1404 · about $30.00/month at 100,000 calls. The top-ranked Kimi K3 costs $1,200.00/month — you save $1,170.00/month with Step 3.5 Flash.
| 1 | Step 3.5 Flash | 1404 | $30.00 | StepFun |
| 2 | DeepSeek V4 Flash | 1430 | $35.00 | DeepSeek |
| 3 | MiMo-V2.5 | 1427 | $35.00 | Xiaomi |
| 4 | MiMo-V2-Flash | 1395 | $35.00 | Xiaomi |
| 5 | MiMo-V2-Omni | 1422 | $35.00 | Xiaomi |
| 6 | DeepSeek V3.2 | 1420 | $63.00 | DeepSeek |
| 7 | Hunyuan Hy3 | 1444 | $70.00 | Tencent |
| 8 | Llama 4 Maverick | 1360 | $75.50 | Meta |
| 9 | GLM-4.5-Air | 1383 | $85.00 | Z.ai (Zhipu AI) |
| 10 | GLM-4.6V | 1375 | $90.00 | Z.ai (Zhipu AI) |
| 11 | GPT-5.4 nano | 1373 | $92.50 | OpenAI |
| 12 | MiniMax-M3 | 1421 | $105.00 | MiniMax |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 28 July 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
Why picking isn’t obvious
Since fluency is broadly solved, the deciding factors are cost and, for long pieces, output token price. We rank on the overall Arena with a moderate bar and surface the cheapest model that still writes well.
FAQ
What is the best value LLM for writing?
Step 3.5 Flash is the cheapest model that still clears our quality bar for this task, at about $30.00/month for 100,000 calls (1,500 in / 500 out). It scores 1404 on the Overall Arena.
Is the most expensive model worth it for this?
Kimi K3 tops the Overall Arena but costs about $1,200.00/month here — roughly $1,170.00/month more than Step 3.5 Flash for 69 extra Arena points. For most workloads that gap is not worth the premium.
Cite / link to this page
You’re welcome to reference this page and its figures with attribution and a link back.
https://aicalculatorpro.com/best-llm-for/content-writing/<a href="https://aicalculatorpro.com/best-llm-for/content-writing/">Best LLM for Content Writing — AI Calculator Pro</a>