Compare models
Pick up to 4. Every model here is free in free-pi.
| Attribute | Solar Pro 4 | Particle | Muse Spark Open (Meta) | GPT-OSS 120B |
|---|---|---|---|---|
| Maker | Upstage | — | Meta | OpenAI |
| Usage in free-pi | ~0.6x usage | 🔥 Free Unlimited: limited time | premium, uses allowance fast · ~25x usage | ~3.0x usage |
| Intelligence index | 28.2 (best) | — | 24.9 | — |
| Coding index | 52.7 (best) | — | — | 30.4 |
| Context window | 524,288 tokens | — | 1,048,576 tokens (best) | 131,072 tokens |
| Max output | 131,072 tokens | — | 943,718 tokens (best) | 65,536 tokens |
| Inputs | Text | — | Text, image, file, audio, video (best) | Text |
| Tool calling | Yes | — | Yes | Yes |
| Reasoning effort | Yes | — | Yes | Yes |
| Structured output | Yes | — | Yes | Yes |
| Released | Aug 10, 2026 | — | Oct 15, 2026 | Aug 5, 2025 |
| 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.