GPT-5 vs Mistral Small 4
OpenAI's flagship vs Europe's cheapest option. Mistral Small 4 is 92% cheaper on input and 97% cheaper on output — but GPT-5 has 2× more context and stronger reasoning. Choose based on your priorities.
Pricing data verified: 2026-06-20
| Specification | GPT-5 (OpenAI) | Mistral Small 4 (Mistral) |
|---|---|---|
| Input Price (per 1M tokens) | $1.25 | $0.100 |
| Output Price (per 1M tokens) | $10.00 | $0.300 |
| Context Window | 272K | 128K |
| Tier | Premium | Budget |
| Provider | OpenAI | Mistral |
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Maximum Cost Savings
Mistral Small 4's 92-97% lower pricing is hard to beat. For teams where cost is the primary concern, Mistral delivers incredible value.
Complex Reasoning
GPT-5's advanced reasoning capabilities justify the premium for tasks requiring multi-step logic, nuanced analysis, and sophisticated problem-solving.
European Data Compliance
Mistral is a European company with GDPR-compliant infrastructure. For EU-based teams, Mistral offers data sovereignty that US providers can't match.
OpenAI Ecosystem
If you're invested in OpenAI's ecosystem (Assistants API, function calling, fine-tuning), GPT-5 offers seamless integration that may justify the cost.
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Frequently Asked Questions
Is GPT-5 cheaper than Mistral Small 4?
No. Mistral Small 4 is dramatically cheaper: $0.10/M input (92% cheaper than GPT-5's $1.25/M) and $0.30/M output (97% cheaper than GPT-5's $10.00/M). However, GPT-5 has a larger 272K context window vs Mistral's 128K.
When would I choose GPT-5?
Choose GPT-5 for complex reasoning, multi-step tasks, function calling, OpenAI ecosystem integration, or when you need GPT-5's superior quality for nuanced analysis and code generation.
When would I choose Mistral Small 4?
Choose Mistral Small 4 for the absolute lowest cost, European data sovereignty (GDPR), high-volume production workloads, or when your tasks don't require GPT-5's advanced reasoning.
Can Mistral Small 4 match GPT-5 quality?
For most standard tasks (chatbots, classification, simple generation), Mistral Small 4 delivers good quality at 92-97% less cost. GPT-5 excels at complex reasoning, nuanced tasks, and sophisticated function calling where the premium may be justified.