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Best AI model for copywriting
For copywriting, Claude Opus 5 scores highest on the current data (79.2), weighting writing & preference 70%, instruction following 30%. The cheapest model in the top 10 is Muse Spark 1.3 at $1.25 / $4.25 per million tokens.
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Weights: Writing & Preference 70%, Instruction Following 30%. Copy is judged by readers, so human-preference results matter most.
| # | Model | Provider | Fit | Writing & Preference | Instruction Following | Input $/M | Output $/M |
|---|---|---|---|---|---|---|---|
| 1 | Claude Opus 5 | Anthropic | 79.2 | 79.2 | 79.2 | $5 | $25 |
| 2 | Claude Fable 5.1 | Anthropic | 79.2 | 79.2 | 79.2 | $10 | $50 |
| 3 | Claude Opus 5.5 | Anthropic | 78.8 | 78.2 | 80.0 | $4 | $20 |
| 4 | Kimi K3 (open weights) | Moonshot AI | 77.0 | 76.6 | 77.7 | $3 | $15 |
| 5 | Claude Fable 5 | Anthropic | 76.7 | 75.9 | 78.6 | $10 | $50 |
| 6 | GLM-5.3 (open weights) | Z.ai (Zhipu) | 76.2 | 75.7 | 77.5 | $1.40 | $4.40 |
| 7 | Claude Opus 4.7 | Anthropic | 76.1 | 75.1 | 78.4 | $5 | $25 |
| 8 | GPT-6 Astra | OpenAI | 75.6 | 75.3 | 76.3 | $10 | $50 |
| 9 | Claude Opus 4.6 | Anthropic | 75.3 | 73.5 | 79.5 | $5 | $25 |
| 10 | Muse Spark 1.3 | Meta | 74.8 | 73.6 | 77.5 | $1.25 | $4.25 |
| 11 | GPT-5.6 Sol | OpenAI | 74.6 | 73.3 | 77.7 | $4 | $20 |
| 12 | Muse Spark 1.1 | Meta | 74.4 | 73.4 | 76.5 | $1.25 | $4.25 |
| 13 | GPT-5.5 | OpenAI | 74.2 | 72.7 | 77.5 | $5 | $30 |
| 14 | Gemini 4 Argon | 74.0 | 71.4 | 80.1 | — | — | |
| 15 | Gemini 3.8 Flash | 74.0 | 72.2 | 78.0 | $0.75 | $3.75 | |
| 16 | Muse Spark 1.2 | Meta | 73.6 | 72.3 | 76.7 | $1.25 | $4.25 |
| 17 | Claude Opus 4.8 | Anthropic | 73.6 | 72.0 | 77.4 | $5 | $25 |
| 18 | GPT-5.4 | OpenAI | 73.5 | 71.9 | 77.1 | $2.50 | $15 |
| 19 | Gemini 3.7 Flash | 73.1 | 71.2 | 77.7 | $0.75 | $3.75 | |
| 20 | GPT-6 Sol | OpenAI | 72.6 | 71.9 | 74.5 | $2 | $10 |
| 21 | GLM-5.2 (open weights) | Z.ai (Zhipu) | 72.4 | 70.4 | 76.9 | $1.40 | $4.40 |
| 22 | Claude Sonnet 4.6 | Anthropic | 72.4 | 70.2 | 77.4 | $3 | $15 |
| 23 | GPT-5.6 Terra | OpenAI | 72.1 | 70.2 | 76.4 | $2 | $12 |
| 24 | Claude Sonnet 5 | Anthropic | 71.4 | 69.2 | 76.3 | $2 | $10 |
| 25 | Grok 4.7 | xAI | 71.2 | 70.0 | 74.1 | $2 | $6 |
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Top two head to head: Claude Opus 5 vs Claude Fable 5.1
Frequently asked questions
What is the best ai model for copywriting?
For copywriting, Claude Opus 5 scores highest on the current data (79.2), weighting writing & preference 70%, instruction following 30%. The cheapest model in the top 10 is Muse Spark 1.3 at $1.25 / $4.25 per million tokens.
How is this shortlist built?
Copy is judged by readers, so human-preference results matter most. Each model's category scores are blended with those weights; only ranked models with results in every needed category are listed.
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