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GPT-5.4 Pro vs Mistral Medium 3.5
OpenAI's premium vs Mistral's mid-tier. GPT-5.4 Pro at $30/$180 costs 20x more than Mistral Medium 3.5 at $1.50/$7.50. Is OpenAI's premium quality worth the massive price gap?
Pricing data verified: Jul 3, 2026
| Specification | GPT-5.4 Pro (OpenAI) | Mistral Medium 3.5 (Mistral) |
|---|---|---|
| Input Price (per 1M tokens) | $30.00 | $1.50 |
| Output Price (per 1M tokens) | $180.00 | $7.50 |
| Context Window | 400K tokens | 128K tokens |
| Tier | Premium | Mid |
| Provider | OpenAI | Mistral |
Calculate Your Exact Costs
See how much you can save with Mistral Medium 3.5 — or whether GPT-5.4 Pro's quality justifies higher cost.
Which Model for Which Use Case?
Complex Reasoning
Multi-step analysis, research synthesis. GPT-5.4 Pro at $30/$180 is OpenAI's premium model. Sonnet 5 at $3/$15 delivers excellent quality at 90% lower cost for most reasoning tasks.
Code Generation
Writing, debugging, refactoring code. Both models produce excellent code. Sonnet 5 at $3/$15 is 10x cheaper, making it the clear winner for code-heavy workloads.
Content Generation
Blog posts, documentation, marketing copy. Sonnet 5 at $3/$15 is 10x cheaper on output, making it the clear winner for content-heavy workloads.
High-Volume Batch Processing
At scale, the 10x cost difference is enormous. 10M input + 5M output tokens/month costs $105 with Sonnet 5 vs $1,050 with GPT-5.4 Pro — saving $945/month.
Choosing between Anthropic and OpenAI?
APIpulse Pro lets you compare all 49 models including GPT-5.4 Pro and Mistral Medium 3.5, save scenarios, and export cost reports.
Frequently Asked Questions
How much cheaper is Mistral Medium 3.5?
Mistral Medium 3.5 costs $1.50/$7.50 per 1M tokens vs GPT-5.4 Pro at $30/$180 — 95% cheaper on input and 96% cheaper on output. At 1M input + 500K output tokens/month, that's $5.25 vs $120, saving $114.75/month.
Is GPT-5.4 Pro worth 20x the cost?
GPT-5.4 Pro at $30/$180 is OpenAI's premium model with 400K context. Mistral Medium 3.5 at $1.50/$7.50 delivers excellent quality at 95% lower cost. For most production workloads, Mistral Medium 3.5 offers better value.
When should I use Mistral Medium 3.5 over GPT-5.4 Pro?
Choose Mistral Medium 3.5 ($1.50/$7.50) for cost-sensitive workloads — it's 20x cheaper. Choose GPT-5.4 Pro ($30/$180) when you need OpenAI's largest 400K context window or peak reasoning quality.
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