Grok 4.1 Fast vs Voxtral Small
Pricing verdict: Grok 4.1 Fast vs Voxtral Small: Voxtral Small is cheaper for input-heavy usage ($0.10/M vs $0.20/M input tokens), while Grok 4.1 Fast is better for long-context tasks (2,000,000 tokens).
Direct answer: choose Voxtral Small for lower token spend and choose Grok 4.1 Fast when your workload needs longer context.
Compare API pricing, input and output token costs, context windows, and monthly estimates on one page so you can pick the right model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Grok 4.1 Fast
Voxtral Small
Cost Differences
Voxtral Small costs less than Grok 4.1 Fast
Quick Recommendation
Winner for direct API pricing: Voxtral Small. At the default workload, Voxtral Small saves about $0.45/month ($5.475/year) versus Grok 4.1 Fast.
Feature Comparison
| Feature | Grok 4.1 Fast | Voxtral Small |
|---|---|---|
| Provider | xAI | Mistral AI |
| Input Price | $0.20/1M tokens | $0.10/1M tokens |
| Output Price | $0.50/1M tokens | $0.40/1M tokens |
| Context Window | 2,000,000 tokens | 32,000 tokens |
| Max Output | 131,072 tokens | 8,192 tokens |
| Category | efficient | efficient |
| Capabilities | textreasoningcode | textaudiotranscription |
| Release Date | 1/15/2026 | 7/15/2026 |
Grok 4.1 Fast vs Voxtral Small: Which Should You Choose?
Choosing between Grok 4.1 Fast and Voxtral Small depends on your priorities: cost efficiency, context length, or raw capability. Voxtral Small is the more affordable option at $0.10/1M input tokens — 50% cheaper than Grok 4.1 Fast. Meanwhile, Grok 4.1 Fast offers a significantly larger context window at 2,000,000 tokens vs 32,000 for Voxtral Small.
These models come from different providers — xAI and Mistral AI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with xAI, switching to Mistral AIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
Both models are in the efficient category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: Voxtral Small would save you roughly $45.00/month compared to Grok 4.1 Fast. For startups and indie developers, that difference can be significant.
Output costs matter too. Grok 4.1 Fast charges $0.50/1M output tokens vs $0.40 for Voxtral Small. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Voxtral Small has the edge here at $0.40/1M output tokens.
Best Use Cases
Choose Grok 4.1 Fast when:
- • You need a larger context window (2,000,000 tokens)
- • You need longer outputs (up to 131,072 tokens)
- • You're already using xAI's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Choose Voxtral Small when:
- • Budget is a primary concern
- • You're already using Mistral AI's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Pros and Caveats at a Glance
Grok 4.1 Fast
- • Input pricing: $0.20/M tokens
- • Output pricing: $0.50/M tokens
- • Context window: 2,000,000 tokens
- • Max output: 131,072 tokens
Watch out for
- • Higher input cost than Voxtral Small
- • Higher output cost than Voxtral Small
Voxtral Small
- • Input pricing: $0.10/M tokens
- • Output pricing: $0.40/M tokens
- • Context window: 32,000 tokens
- • Max output: 8,192 tokens
Watch out for
- • Smaller context window than Grok 4.1 Fast
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Grok 4.1 Fast (xAI)
Voxtral Small (Mistral AI)
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Which is cheaper, Grok 4.1 Fast or Voxtral Small?▼
What is the context window difference between Grok 4.1 Fast and Voxtral Small?▼
Which model is better for AI Chatbot?▼
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