GPT-5 vs Grok: Full Comparison
GPT-5 vs Grok: compare reasoning, coding, writing, context window and pricing.
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Every major model, one app
Side-by-side specs
On Multio, both GPT-5 and Grok 4.1 Fast are available via BYOK — bring your OpenAI/Anthropic keys to chat with either, in the same workspace. Swap models mid-conversation to run the same prompt through each and pick the response that fits your task.
| Spec | GPT-5 | Grok 4.1 Fast |
|---|---|---|
| Provider | OpenAI | xAI |
| Free tier | No | No |
| Context window | 400K tokens | 2M tokens |
| Max output tokens | 128K tokens | 30K tokens |
| Input modalities | Text, Image, File | Text, Image, File |
| Output modalities | Text | Text |
| Input price (per 1M tokens) | $1.25/M | $0.20/M |
| Output price (per 1M tokens) | $10.00/M | $0.50/M |
Read the full GPT-5 write-up
GPT-5 on Multio →
Read the full Grok write-up
Grok 4.1 Fast on Multio →
FAQ
- Which is better, GPT-5 or Grok?
- On Multio, GPT-5's flagship GPT-5 offers a 400,000-token context window, while Grok's flagship Grok 4.1 Fast offers 2,000,000 tokens. GPT-5 tends to lead in multi-step reasoning, while Grok tends to lead in multimodal grounding. Run both on the same prompt in Multio to judge on your own use case.
- Can I use both GPT-5 and Grok on one account?
- Yes. On a paid Multio plan, both models are included and reachable through every Multio agent. BYOK is an optional add-on if you'd rather route premium-model usage to your own provider account. Free open-source models are included out of the box.
- How do I switch between GPT-5 and Grok mid-conversation?
- Multio lets you swap the underlying model in any chat without losing context — open the model picker above the input and pick GPT-5 or Grok 4.1 Fast.
- Is GPT-5 or Grok free on Multio?
- Free models are out of the box on Multio. Premium models like GPT-5 and Grok are BYOK — add your provider key in /settings/api-keys, and your provider bills you directly for usage.