Grok 4.1 Fast vs Ministral 3 8B
Grok 4.1 Fast vs Ministral 3 8B: Ministral 3 8B is cheaper for input-heavy usage ($0.15/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 Ministral 3 8B for lower token spend and choose Grok 4.1 Fast when your workload needs longer context.
Compare input and output token pricing, context windows, and monthly cost estimates on one page so you can pick the cheaper model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Grok 4.1 Fast
Ministral 3 8B
Cost Differences
Ministral 3 8B costs less than Grok 4.1 Fast
Quick Recommendation
Winner for direct API pricing: Ministral 3 8B. At the default workload, Ministral 3 8B saves about $0.675/month ($8.2125/year) versus Grok 4.1 Fast.
Feature Comparison
| Feature | Grok 4.1 Fast | Ministral 3 8B |
|---|---|---|
| Provider | xAI | Mistral AI |
| Input Price | $0.20/1M tokens | $0.15/1M tokens |
| Output Price | $0.50/1M tokens | $0.15/1M tokens |
| Context Window | 2,000,000 tokens | 256,000 tokens |
| Max Output | 131,072 tokens | 32,768 tokens |
| Category | efficient | efficient |
| Capabilities | textreasoningcode | textvision |
| Release Date | 1/15/2026 | 12/2/2025 |
Grok 4.1 Fast vs Ministral 3 8B: Which Should You Choose?
Choosing between Grok 4.1 Fast and Ministral 3 8B depends on your priorities: cost efficiency, context length, or raw capability. Ministral 3 8B is the more affordable option at $0.15/1M input tokens — 25% cheaper than Grok 4.1 Fast. Meanwhile, Grok 4.1 Fast offers a significantly larger context window at 2,000,000 tokens vs 256,000 for Ministral 3 8B.
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: Ministral 3 8B would save you roughly $67.50/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 $0.15 for Ministral 3 8B. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Ministral 3 8B has the edge here at $0.15/1M output tokens.
Multimodal capabilities: Ministral 3 8B supports vision (image inputs) while Grok 4.1 Fast is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose Grok 4.1 Fast when:
- • You need a larger context window (2,000,000 tokens)
- • You need more capabilities (reasoning, code)
- • 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 Ministral 3 8B 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 Ministral 3 8B
- • Higher output cost than Ministral 3 8B
Ministral 3 8B
- • Input pricing: $0.15/M tokens
- • Output pricing: $0.15/M tokens
- • Context window: 256,000 tokens
- • Max output: 32,768 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)
Ministral 3 8B (Mistral AI)
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Which is cheaper, Grok 4.1 Fast or Ministral 3 8B?▼
What is the context window difference between Grok 4.1 Fast and Ministral 3 8B?▼
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