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Pick up to 4. Every model here is free in free-pi.
Claude Haiku 5.5 GPT-6.1 Terra Flex Muse Spark Open (Meta)
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| Attribute | Claude Haiku 5.5 | GPT-6.1 Terra Flex | Muse Spark Open (Meta) |
|---|---|---|---|
| Maker | Anthropic | OpenAI | Meta |
| Usage in free-pi | ~2.0x usage | slower · ~20x usage | premium, uses allowance fast · ~25x usage |
| Intelligence index | 36.2 | 51 (best) | 24.7 |
| Coding index | — | — | — |
| Context window | 1,000,000 tokens | 1,050,000 tokens (best) | 1,048,576 tokens |
| Max output | 128,000 tokens | 128,000 tokens | 943,718 tokens (best) |
| Inputs | Text, image, file | Text, image, file | Text, image, file, audio, video (best) |
| Tool calling | Yes | Yes | Yes |
| Reasoning effort | Yes | Yes | Yes |
| Structured output | Yes | Yes | Yes |
| Released | Oct 7, 2026 | Oct 26, 2026 | Oct 15, 2026 |
| 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.