AI model comparisons
Which AI to pick: popular models compared by task and price.
Each comparison answers three questions: what each model does best, what it costs and which to take for your task. Every model here is on Freepay in one chat, so you can check for yourself. The full list is in AI models.
| Comparison | In short |
|---|---|
| Claude Sonnet 5.5 or GPT-6.1 Sol | Both are everyday models at the same price. |
| Claude Opus 5.5 or GPT-6 Astra | The strongest models for hard work. |
| GPT-6.1 Sol or Gemini 3.1 Pro | Close in price. |
| Claude Sonnet 5.5 or Gemini 3.1 Pro | Claude Sonnet is stronger in writing and code; Gemini 3.1 Pro is handier when you need to go through a big document or spreadsheet. |
| DeepSeek V4 Pro or GPT-6.1 Sol | DeepSeek V4 Pro is noticeably cheaper and good at maths and code. |
| DeepSeek Flash or GPT-6 Luna | Both are for simple questions at a tiny price. |
| DeepSeek V4 Pro or Claude Sonnet 5.5 | DeepSeek V4 Pro is noticeably cheaper and good at maths and code. |
| Grok 4.7 or GPT-6.1 Sol | Grok 4.7 answers more bluntly and its answers cost less; GPT-6.1 Sol is more careful, explains better and suits study. |
| Grok 4.7 or Claude Sonnet 5.5 | Grok 4.7 costs less per answer and speaks plainly. |
| Gemini 4 Argon or GPT-6 Astra | The strongest models of Google and OpenAI. |
| Claude Haiku 5.5 or Claude Sonnet 5.5 | Haiku 5.5 is twenty times cheaper and faster, enough for simple questions and translations. |
| Claude Sonnet 5.5 or Claude Opus 5.5 | Sonnet 5.5 costs half as much and covers most tasks. |
| Claude Opus 5.5 or Claude Fable 5.2 | Opus 5.5 is half the price of Fable 5.2 and handles most hard tasks. |
| GPT-6.1 Sol or GPT-6.1 Terra | Terra is half the price and faster, enough for most questions. |
| Gemini 3.6 Flash or Gemini 3.1 Pro | Flash answers in seconds and is four times cheaper; Pro is for large documents and serious analysis. |
| Qwen3 Max or DeepSeek V4 Pro | Two strong Chinese models. |
| Kimi K2 or DeepSeek V4 Pro | Kimi K2 keeps long conversations and multi-step tasks on track better; DeepSeek V4 Pro is stronger in maths and code. |
| GLM 5 or DeepSeek V4 Pro | GLM 5 and DeepSeek V4 Pro cost about the same. |
| Mistral Large or GPT-6.1 Sol | Mistral Large costs less per answer and knows European languages well. |
| Claude Haiku 5.5 or GPT-6 Luna | The cheapest Claude and ChatGPT models cost the same. |
| Gemini 3.6 Flash or DeepSeek Flash | Two fast, inexpensive models. |