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