Compare models
Pick up to 4. Every model here is free in free-pi.
| Attribute | Muse Spark Open (Meta) | GPT-6 Luna | Uncensored 1.2 | Kimi K3.1 Pro |
|---|---|---|---|---|
| Maker | Meta | OpenAI | — | MoonshotAI |
| Usage in free-pi | premium, uses allowance fast · ~25x usage | ~2.0x usage | ~20x usage | credit users · ~41x usage |
| Intelligence index | 24.7 | 27.8 | — | 46 (best) |
| Coding index | — | — | — | — |
| Context window | 1,048,576 tokens | 1,050,000 tokens (best) | — | 1,048,576 tokens |
| Max output | 943,718 tokens (best) | 128,000 tokens | — | 943,718 tokens (best) |
| Inputs | Text, image, file, audio, video (best) | Text, image, file | — | Text, image, video |
| Tool calling | Yes | Yes | — | Yes |
| Reasoning effort | Yes | Yes | — | Yes |
| Structured output | Yes | Yes | — | Yes |
| Released | Oct 15, 2026 | Sep 22, 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.