Compare models
Pick up to 4. Every model here is free in free-pi.
| GPT-6 Luna | Claude Sonnet 5.5 | Defense Flash 2 | Defense Flash | |
|---|---|---|---|---|
| Maker | OpenAI | Anthropic | — | — |
| Usage in free-pi | ~2.0x usage | premium, uses allowance fast · ~41x usage | ~20x usage | ~20x usage |
| Intelligence index | 38.1 | 56 (best) | — | — |
| Coding index | — | — | — | — |
| Context window | 1,050,000 tokens (best) | 1,000,000 tokens | — | — |
| Max output | 128,000 tokens (best) | 128,000 tokens (best) | — | — |
| Inputs | Text, image, file (best) | Text, image, file (best) | — | — |
| Tool calling | Yes | Yes | — | — |
| Reasoning effort | Yes | Yes | — | — |
| Structured output | Yes | Yes | — | — |
| Released | Sep 22, 2026 | Sep 28, 2026 | — | — |
| Model page | Model page | Model page | Model page | Model page |
Stats from OpenRouter; refreshed automatically. Usage rate from free-pi. Green marks the best value in each row. “—” means no figure is available.