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 Grok 4xAI |  Gemini Omni |  GPT-5.5OpenAI | |
|---|---|---|---|
| Vendor | xAI | OpenAI | |
| Family | Grok | Gemini | GPT |
| Release date | 2025-07-09 | 2026-05-20 | 2026-04-23 |
| Context window | 256,000 tokens | 1,000,000 tokens | 400,000 tokens |
| Parameters | — | — | — |
| Modality | text | text, vision, audio, video | text, vision, audio |
| License | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary |
| Description | — | Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model. | 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. |
| Links | |||
| Benchmarks | |||
| MMLU-Pro | 82.8% | — | 87.6% |
| GPQA-D | 87.5% | — | 89.4% |
| HumanEval | — | — | 96.8% |
| Aider | 72.5% | — | 89.7% |
| AIME-25 | 86.1% | — | 94.2% |
| LiveCB | 65.3% | — | 78.9% |
| MMMU | — | 82.5% | 78.4% |
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Claude 4.8 Opus+
Qwen3.7-Max+Gemini 3.5+Gemini Omni✓GPT-5.5✓Qwen3.6-27B+
DeepSeek-V4-Flash+DeepSeek-V4-Pro+Gemini 3 Pro+Claude 4.7 Opus+Claude 4.6 Sonnet+Claude 4.5 Haiku+DeepSeek-V3.1+GPT-5+Grok 4✓Gemini 2.5 Flash+Qwen3 235B+o3+GPT-4.1+
Llama 4 Scout+Llama 4 Maverick+Gemini 2.5 Pro+DeepSeek-R1+
Mistral Large 2+