Compare models
Pick up to 4. Every model here is free in free-pi.
| Attribute | Particle | GPT-6.1 Sol Flex | GLM 5.3 Flash | Kimi K3.1 Pro |
|---|---|---|---|---|
| Maker | — | OpenAI | Z.ai | MoonshotAI |
| Usage in free-pi | 🔥 Free Unlimited: limited time | slower · ~41x usage | 🔥 Free Unlimited: limited time | daily limit · ~41x usage |
| Intelligence index | — | 54.6 (best) | 27.8 | 46.5 |
| Coding index | — | — | 71.5 | — |
| Context window | — | 1,050,000 tokens (best) | 1,048,576 tokens | 1,048,576 tokens |
| Max output | — | 128,000 tokens | 943,717 tokens | 943,718 tokens (best) |
| Inputs | — | Text, image, file (best) | Text, image, video (best) | Text, image, video (best) |
| Tool calling | — | Yes | Yes | Yes |
| Reasoning effort | — | Yes | Yes | Yes |
| Structured output | — | Yes | Yes | Yes |
| Released | — | Sep 29, 2026 | Aug 26, 2026 | Oct 23, 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.