Best AI Models for Writing PRDs
Product requirements documents reward deep reasoning, structure, and the ability to hold a lot of context. These models rank highest for drafting and refining PRDs.
Top pick
Claude Opus 4.8
PM Index 55.9 · $10.00/1M tok
Best value
DeepSeek V4 Flash
PM Index 40.1 · $0.18/1M tok
| # | Model | PM Index | $/1M tok |
|---|---|---|---|
| 1 | Claude Opus 4.8 Anthropic | 55.9 | $10.00 |
| 2 | GLM-5.2 Z AI | 51.3 | $2.15 |
| 3 | Claude Fable 5 Anthropic | 60.1 | $20.00 |
| 4 | GPT-5.5 OpenAI | 54.8 | $11.25 |
| 5 | GPT-5.4 OpenAI | 51.3 | $5.63 |
| 6 | Claude Opus 4.7 Anthropic | 53.7 | $10.00 |
| 7 | Gemini 3.5 Flash |
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