Grok 4 Fast ≤128k vs DeepSeek Reasoner
Side-by-side comparison of pricing and capabilities
Grok 4 Fast ≤128k
DeepSeek Reasoner
Input Price Comparison
| Attribute | Grok 4 Fast ≤128k | DeepSeek Reasoner |
|---|---|---|
| Provider | xAI | DeepSeek |
| Input Price | $0.2 /1M tokens | $0.55 /1M tokens |
| Output Price | $0.5 /1M tokens | $2.19 /1M tokens |
| Cached Input | $0.050 /1M tokens | $0.055 /1M tokens |
| Context Window | 131K | 128K |
| Type | chat | reasoning |
| Status | current | current |
Capability Comparison
| Capability | Grok 4 Fast ≤128k | DeepSeek Reasoner |
|---|---|---|
| coding | ||
| reasoning |
Which should you choose?
Budget-conscious: Grok 4 Fast ≤128k is 64% cheaper on input tokens ($0.2 vs $0.55 per 1M tokens).
Context-heavy tasks: Grok 4 Fast ≤128k offers a larger context window (131K vs 128K), making it better for long documents or conversations.
Capability fit: Grok 4 Fast ≤128k supports 1 capabilities (coding), while DeepSeek Reasoner supports 2 (reasoning, coding).
Frequently Asked Questions
Which is cheaper: Grok 4 Fast ≤128k or DeepSeek Reasoner?
Grok 4 Fast ≤128k costs $0.2/1M input vs DeepSeek Reasoner at $0.55/1M input. Grok 4 Fast ≤128k is 64% cheaper on input tokens.
How do output prices compare between Grok 4 Fast ≤128k and DeepSeek Reasoner?
Grok 4 Fast ≤128k output: $0.5/1M, DeepSeek Reasoner output: $2.19/1M. Grok 4 Fast ≤128k is more economical for generation-heavy workloads.
What is Grok 4 Fast ≤128k best used for?
Grok 4 Fast ≤128k is best for budget-conscious applications, high-volume chatbots, and tasks where cost efficiency is the primary concern.
What is DeepSeek Reasoner best used for?
DeepSeek Reasoner is suited for complex reasoning, analysis, and tasks that benefit from its reasoning and coding capabilities.