Compare models
Pick up to 4. Every model here is free in free-pi.
| Attribute | Particle | GPT-6.1 Terra | GPT-OSS 120B | GPT-6 Luna |
|---|---|---|---|---|
| Maker | — | OpenAI | OpenAI | OpenAI |
| Usage in free-pi | 🔥 Free Unlimited: limited time | premium, uses allowance fast · ~20x usage | ~3.0x usage | ~2.0x usage |
| Intelligence index | — | 51.3 (best) | — | 27.9 |
| Coding index | — | — | 30.4 | — |
| Context window | — | 1,050,000 tokens (best) | 131,072 tokens | 1,050,000 tokens (best) |
| Max output | — | 128,000 tokens (best) | 65,536 tokens | 128,000 tokens (best) |
| Inputs | — | Text, image, file (best) | Text | Text, image, file (best) |
| Tool calling | — | Yes | Yes | Yes |
| Reasoning effort | — | Yes | Yes | Yes |
| Structured output | — | Yes | Yes | Yes |
| Released | — | Oct 26, 2026 | Aug 5, 2025 | Sep 22, 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.