Compare models
Pick up to 4. Every model here is free in free-pi.
| Attribute | GPT-6.1 Sol Flex | GLM 5.3 Flash | DeepSeek V4 Pro | Particle |
|---|---|---|---|---|
| Maker | OpenAI | Z.ai | DeepSeek | — |
| Usage in free-pi | slower · ~41x usage | 🔥 Free Unlimited: limited time | ~18x usage | 🔥 Free Unlimited: limited time |
| Intelligence index | 54.6 (best) | 27.8 | 12.6 | — |
| Coding index | — | 71.5 | — | — |
| Context window | 1,050,000 tokens (best) | 1,048,576 tokens | 1,048,576 tokens | — |
| Max output | 128,000 tokens | 943,717 tokens (best) | 393,216 tokens | — |
| Inputs | Text, image, file (best) | Text, image, video (best) | Text | — |
| Tool calling | Yes | Yes | Yes | — |
| Reasoning effort | Yes | Yes | Yes | — |
| Structured output | Yes | Yes | Yes | — |
| Released | Sep 29, 2026 | Aug 26, 2026 | Apr 24, 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.