GPT-5 Mini vs Grok 4 Fast Reasoning >128k
Side-by-side comparison of pricing and capabilities
GPT-5 Mini
Grok 4 Fast Reasoning >128k
Input Price Comparison
| Attribute | GPT-5 Mini | Grok 4 Fast Reasoning >128k |
|---|---|---|
| Provider | OpenAI | xAI |
| Input Price | $0.25 /1M tokens | $0.4 /1M tokens |
| Output Price | $2 /1M tokens | $1 /1M tokens |
| Cached Input | $0.025 /1M tokens | $0.050 /1M tokens |
| Context Window | 400K | 1.0M |
| Type | chat | reasoning |
| Status | current | current |
Capability Comparison
| Capability | GPT-5 Mini | Grok 4 Fast Reasoning >128k |
|---|---|---|
| coding | ||
| multilingual | ||
| reasoning |
Which should you choose?
Budget-conscious: GPT-5 Mini is 38% cheaper on input tokens ($0.25 vs $0.4 per 1M tokens).
Context-heavy tasks: Grok 4 Fast Reasoning >128k offers a larger context window (1.0M vs 400K), making it better for long documents or conversations.
Capability fit: GPT-5 Mini supports 2 capabilities (coding, multilingual), while Grok 4 Fast Reasoning >128k supports 1 (reasoning).
Frequently Asked Questions
Which is cheaper: GPT-5 Mini or Grok 4 Fast Reasoning >128k?
GPT-5 Mini costs $0.25/1M input vs Grok 4 Fast Reasoning >128k at $0.4/1M input. GPT-5 Mini is 38% cheaper on input tokens.
How do output prices compare between GPT-5 Mini and Grok 4 Fast Reasoning >128k?
GPT-5 Mini output: $2/1M, Grok 4 Fast Reasoning >128k output: $1/1M. Grok 4 Fast Reasoning >128k is more economical for generation-heavy workloads.
What is GPT-5 Mini best used for?
GPT-5 Mini is best for budget-conscious applications, high-volume chatbots, and tasks where cost efficiency is the primary concern.
What is Grok 4 Fast Reasoning >128k best used for?
Grok 4 Fast Reasoning >128k is suited for complex reasoning, analysis, and tasks that benefit from its reasoning capabilities.