Compare models
Pick up to 4. Every model here is free in free-pi.
| Attribute | DeepSeek V4 Pro | DeepSeek V4 Flash | Particle | GPT-6.1 Terra Flex |
|---|---|---|---|---|
| Maker | DeepSeek | DeepSeek | — | OpenAI |
| Usage in free-pi | ~18x usage | 1x usage (default) | 🔥 Free Unlimited: limited time | slower · ~20x usage |
| Intelligence index | 12.6 | — | — | 51.3 (best) |
| Coding index | — | 69.1 | — | — |
| Context window | 1,048,576 tokens | 1,048,576 tokens | — | 1,050,000 tokens (best) |
| Max output | 393,216 tokens | 943,718 tokens (best) | — | 128,000 tokens |
| Inputs | Text | Text | — | Text, image, file (best) |
| Tool calling | Yes | Yes | — | Yes |
| Reasoning effort | Yes | Yes | — | Yes |
| Structured output | Yes | Yes | — | Yes |
| Released | Apr 24, 2026 | Jul 31, 2026 | — | Oct 26, 2026 |
| Model page | Model page | Model page | Model page | Model page |
Stats refreshed automatically. Usage rate from free-pi. Green marks the best value in each row. “—” means no figure is available.