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Pick up to 4. Every model here is free in free-pi.
Claude Sonnet 5.5 Defense Flash
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| Claude Sonnet 5.5 | Defense Flash | |
|---|---|---|
| Maker | Anthropic | — |
| Usage in free-pi | premium, uses allowance fast · ~41x usage | ~20x usage |
| Intelligence index | 56 | — |
| Coding index | — | — |
| Context window | 1,000,000 tokens | — |
| Max output | 128,000 tokens | — |
| Inputs | Text, image, file | — |
| Tool calling | Yes | — |
| Reasoning effort | Yes | — |
| Structured output | Yes | — |
| Released | Sep 28, 2026 | — |
| 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.