Compare models
Pick up to 4. Every model here is free in free-pi.
| Attribute | Particle | GPT-OSS 120B | Kimi K3.1 Pro | Solar Pro 4 |
|---|---|---|---|---|
| Maker | — | OpenAI | MoonshotAI | Upstage |
| Usage in free-pi | 🔥 Free Unlimited: limited time | ~3.0x usage | daily limit · ~41x usage | ~0.6x usage |
| Intelligence index | — | — | 46.5 (best) | 28.2 |
| Coding index | — | 30.4 | — | 52.7 (best) |
| Context window | — | 131,072 tokens | 1,048,576 tokens (best) | 524,288 tokens |
| Max output | — | 65,536 tokens | 943,718 tokens (best) | 131,072 tokens |
| Inputs | — | Text | Text, image, video (best) | Text |
| Tool calling | — | Yes | Yes | Yes |
| Reasoning effort | — | Yes | Yes | Yes |
| Structured output | — | Yes | Yes | Yes |
| Released | — | Aug 5, 2025 | Oct 23, 2026 | Aug 10, 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.