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 GPT-5.5OpenAI |  Llama 4 MaverickMeta |  Grok 4xAI |  DeepSeek-V4-FlashDeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | Meta | xAI | DeepSeek |
| Family | GPT | Llama | Grok | DeepSeek |
| Release date | 2026-04-23 | 2025-04-05 | 2025-07-09 | 2026-04-22 |
| Context window | 400,000 tokens | 1,000,000 tokens | 256,000 tokens | 1,000,000 tokens |
| Parameters | — | 400B | — | 284B (13B active) |
| Modality | text, vision, audio | text, vision | text | text |
| License | proprietary | Llama 4 Community License | proprietary | MIT |
| Source | proprietary | open weights | 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. | Mixture-of-experts open-weight model from Meta. | — | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | 87.6% | 80.5% | 82.8% | — |
| GPQA-D | 89.4% | — | 87.5% | — |
| HumanEval | 96.8% | — | — | — |
| Aider | 89.7% | — | 72.5% | — |
| AIME-25 | 94.2% | — | 86.1% | — |
| LiveCB | 78.9% | — | 65.3% | — |
| MMMU | 78.4% | 68.5% | — | — |
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