GPT 3.5 Turbo Instruct vs Grok 4.5
Instruction-following variant of GPT-3.5 for completion-style tasks.
xAI's Opus-class flagship for frontier coding, agentic tool use, and knowledge work.
No captured outputs for these models yet.
Frequently Asked Questions: GPT 3.5 Turbo Instruct vs Grok 4.5▼
Which is better, GPT 3.5 Turbo Instruct or Grok 4.5?
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Both GPT 3.5 Turbo Instruct and Grok 4.5 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.
Which is cheaper, GPT 3.5 Turbo Instruct or Grok 4.5?
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GPT 3.5 Turbo Instruct has a lower blended cost. GPT 3.5 Turbo Instruct: $1.50 input / $2.00 output. Grok 4.5: $2.00 input / $6.00 output.
Which has a larger context window, GPT 3.5 Turbo Instruct or Grok 4.5?
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Grok 4.5 has a larger context window: GPT 3.5 Turbo Instruct supports 4K tokens vs Grok 4.5 at 500K tokens.
Do both GPT 3.5 Turbo Instruct and Grok 4.5 support vision?
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Grok 4.5 supports vision/image input, but GPT 3.5 Turbo Instruct does not.
What are the key differences between GPT 3.5 Turbo Instruct and Grok 4.5?
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Key differences: only Grok 4.5 supports vision input; only Grok 4.5 offers extended reasoning mode. Compare full specs on this page.
Which model should I choose for my use case?
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If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GPT 3.5 Turbo Instruct and Grok 4.5 for free on idapt.app to see which performs better for your specific needs.