Compare models
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 GPT-5.5OpenAI |  Claude 4.5 HaikuAnthropic |  Llama 4 ScoutMeta | |
|---|---|---|---|
| Vendor | OpenAI | Anthropic | Meta |
| Family | GPT | Claude | Llama |
| Release date | 2026-04-23 | 2025-10-01 | 2025-04-05 |
| Context window | 400,000 tokens | 200,000 tokens | 10,000,000 tokens |
| Parameters | — | — | 109B |
| Modality | text, vision, audio | text, vision | text, vision |
| License | proprietary | proprietary | Llama 4 Community License |
| Source | proprietary | proprietary | open weights |
| Description | OpenAI's smartest and most intuitive model — successor to GPT-5, with major coding, research, and document workflow gains. GPT-5.5 Pro variant also available for heavier reasoning. | Fast, cost-effective Claude model. | — |
| Links |
