GPT-5.5 vs Mistral Small 4 — Premium vs Budget Showdown
Mistral Small 4 is 98% cheaper on input and 99% cheaper on output than GPT-5.5. But GPT-5.5 has 8.2x more context. The ultimate premium vs budget AI comparison.
Pricing data verified: Jun 21, 2026
Head-to-Head Comparison
A premium powerhouse versus an ultra-cheap budget model.
| Feature | GPT-5.5 | Mistral Small 4 | Winner |
|---|---|---|---|
| Provider | OpenAI | Mistral | — |
| Tier | Premium | Budget | — |
| Input Price (per 1M) | $5.00 | $0.10 | Mistral Small 4 |
| Output Price (per 1M) | $30.00 | $0.30 | Mistral Small 4 |
| Context Window | 1.05M | 128K | GPT-5.5 |
| Input Savings | — | 98% cheaper | Mistral Small 4 |
| Output Savings | — | 99% cheaper | Mistral Small 4 |
| Complex Reasoning | Advanced | Basic | GPT-5.5 |
| Best For | Complex reasoning, long context | High-volume budget tasks | Depends on use case |
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When to Choose Each Model
Complex Reasoning Tasks
Multi-step analysis, advanced coding, and tasks requiring deep contextual understanding. GPT-5.5's 1.05M context window and advanced reasoning capabilities make it ideal for enterprise-grade applications.
High-Volume Classification
Sorting, tagging, and categorizing large datasets. Mistral Small 4's ultra-low $0.10 input pricing makes it perfect for processing millions of items without breaking the budget.
Batch Data Processing
Processing structured data at scale. Mistral Small 4's 99% cheaper output pricing ($0.30 vs $30.00) makes it the clear winner for high-volume batch workloads where output tokens dominate.
Enterprise Code Generation
Complex code generation across large codebases. GPT-5.5's 1.05M context window can handle entire repositories, while its advanced reasoning ensures high-quality, production-ready code.
Cost-Sensitive Workloads
When every dollar counts. Mistral Small 4's pricing is 98-99% cheaper than GPT-5.5 across the board. For simple tasks that don't need premium capabilities, the savings are enormous.
Multi-Step Analysis
Research tasks, document analysis, and complex reasoning chains. GPT-5.5's superior context window and reasoning capabilities justify the premium for tasks where accuracy is critical.
Frequently Asked Questions
Is Mistral Small 4 cheaper than GPT-5.5?
Yes, dramatically. Mistral Small 4 costs $0.10/$0.30 per 1M tokens while GPT-5.5 costs $5.00/$30.00. That's 98% cheaper on input and 99% cheaper on output. For high-volume workloads, Mistral Small 4 can be 100x cheaper overall.
Which has a larger context window?
GPT-5.5 has a 1.05M token context window, 8.2x larger than Mistral Small 4's 128K context window. This makes GPT-5.5 far better for processing very long documents, large codebases, and complex reasoning tasks that benefit from extensive context.
When should I choose GPT-5.5 over Mistral Small 4?
Choose GPT-5.5 when you need complex reasoning, advanced coding capabilities, or the full 1.05M context window. GPT-5.5 is ideal for enterprise applications, multi-step reasoning chains, and tasks where accuracy and sophistication matter more than cost.
When should I choose Mistral Small 4 over GPT-5.5?
Choose Mistral Small 4 when cost is your primary concern and your tasks are relatively straightforward. Mistral Small 4 is ideal for high-volume classification, simple content generation, data extraction, and batch processing. At $0.10/$0.30 per 1M tokens, it's one of the cheapest models available.
How much can I save switching from GPT-5.5 to Mistral Small 4?
Savings are massive. At 1M tokens/month (50% input, 50% output), GPT-5.5 costs $175.00 while Mistral Small 4 costs $0.20 — saving $174.80/month (99.9%). Even at 100M tokens/month, you'd save $17,480/month. The tradeoff is capability and context window size.
The Verdict
It Depends on Your Needs
Mistral Small 4's 98-99% cheaper pricing makes it the clear winner for cost optimization. At $0.10/$0.30 per 1M tokens, it's ideal for high-volume, straightforward tasks. GPT-5.5 is the right choice when you need complex reasoning, advanced coding, or the full 1.05M context window — but you'll pay 50-100x more for that capability.
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