Context window comparison: • ChatGPT 5: 400,000 tokens
• Gemini 2.5 Pro: 1,000,000 tokens
• Grok 4 Fast: 2,000,000 tokens that’s 5x bigger than ChatGPT. 2x bigger than Gemini. load your entire codebase as one prompt. every doc. every conversation. every data point. no
Grok 4 Fast has 2M token context window, 5x ChatGPT, 2x Gemini
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