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OpenAI | xAI | |||
|---|---|---|---|---|
| Vendor | OpenAI | xAI | ||
| Family | Gemini | GPT | Gemini | Grok |
| Release date | 2025-06-17 | 2026-04-23 | 2026-05-20 | 2025-07-09 |
| Context window | 1,000,000 tokens | 400,000 tokens | 1,000,000 tokens | 256,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision, audio | text, vision, audio | text, vision, audio, video | text |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | proprietary |
| Description | Google's cost-and-latency-optimized Gemini 2.5 variant. Generally available June 2025 — designed for high-throughput agentic workflows with sub-second first-token latency. | 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. | Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model. | — |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 87.6% | — | 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% | 82.5% | — |
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