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Grok 4.1 Fast just made a nearly 3X jump in long-context accuracy
A key challenge for AI models is that as chats get longer, most AIs forget. They lose the thread, make stuff up, or drop instructions.
Grok 4.1 Fast fixes this. And it’s a huge deal.
It was specifically trained
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Grok 4.1 Fast just made a nearly 3X jump in long-context accuracy
A key challenge for AI models is that as chats get longer, most AIs forget. They lose the thread, make stuff up, or drop instructions.
Grok 4.1 Fast fixes this. And it’s a huge deal.
It was specifically trained with “Long-Horizon” learning to maintain perfect focus across massive 2M-token conversations. Now it’s more reliable than ever
The performance leap is undeniable:
🔹 Accuracy: 21% ➔ 57% (~2.8x)
🔹 Reliability: 22% ➔ 67% (~3x)
Whether you’re building a support agent, debugging a massive codebase, or writing a novel, Grok 4.1 Fast stays sharp from the first message to the last
点击图片查看原图
xAI just released Grok 4.1 Fast API
Ranks #1 on 𝜏²-Bench on Telecom (Agentic Tool Use) - Outperforms Gemini 3 Pro
- State-of-the-art tool calling
- Massive 2M Context Window
- Trained for the real world use
Grok 4 Fast non-reasoning ➝ Instant Response
Grok 4 Fast - Reasoning
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Grok 4.1 is unbelievably fast and insanely good and ready to use on the go
By default, it runs in “Non-Thinking” mode for lightning-fast answers which is pretty great - perfect for most queries
However with just one click, you can easily enable “Think Harder” mode to tap into
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What xAI does is absolutely insane…it’s a total game reset
Grok 4 Fast delivers GPT-5 (High) performance - for just 5% of the cost (95.7% cheaper)... Insane value
If you're still no using Grok 4 Fast, you're just literally burning money
Grok 4 Fast costs
- Input tokens:
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Grok 4 Fast matches GPT-5 (High) performance at ~23x lower cost (95.7% cheaper)
Input tokens: 84% cheaper
Output tokens: 95% cheaper
Output speed: 150% faster
GPT-5: $1.25/M input, $10/M output
Grok 4 Fast: $0.20/M input, $0.50/M output
Grok: 344 tokens/s
GPT-5: ~138 tokens/s
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GROK 4.1 TAKES THE TOP SPOT IN GLOBAL AI RANKINGS
With numbers like these, Grok 4.1 makes the leaderboard look under-staffed!
Score Checks:
• EQ-Bench: 1586, leaving everything else looking underqualified
• LM Arena text score: 1483, because Grok 4.1 refuses to play small
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