Mistral Medium 3.5 vs o1 Pro
Mistral Medium 3.5 vs o1 Pro: Mistral Medium 3.5 is cheaper for input-heavy usage ($1.50/M vs $150.00/M input tokens), while Mistral Medium 3.5 is better for long-context tasks (256,000 tokens).
Direct answer: choose Mistral Medium 3.5 for lower token spend and choose Mistral Medium 3.5 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)
Mistral Medium 3.5
o1 Pro
Cost Differences
o1 Pro costs more than Mistral Medium 3.5
Quick Recommendation
Winner for direct API pricing: Mistral Medium 3.5. At the default workload, Mistral Medium 3.5 saves about $1,334.25/month ($16,233.375/year) versus o1 Pro.
Feature Comparison
| Feature | Mistral Medium 3.5 | o1 Pro |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Input Price | $1.50/1M tokens | $150.00/1M tokens |
| Output Price | $7.50/1M tokens | $600.00/1M tokens |
| Context Window | 256,000 tokens | 200,000 tokens |
| Max Output | 32,768 tokens | 100,000 tokens |
| Category | flagship | flagship |
| Capabilities | textvisioncodereasoning | textvisioncodereasoning |
| Release Date | 4/29/2026 | 12/17/2024 |
Mistral Medium 3.5 vs o1 Pro: Which Should You Choose?
Choosing between Mistral Medium 3.5 and o1 Pro depends on your priorities: cost efficiency, context length, or raw capability. Mistral Medium 3.5 is the more affordable option at $1.50/1M input tokens — 99% cheaper than o1 Pro. Meanwhile, Mistral Medium 3.5 offers a significantly larger context window at 256,000 tokens vs 200,000 for o1 Pro.
These models come from different providers — Mistral AI and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Mistral AI, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
Both models are in the flagship category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: Mistral Medium 3.5 would save you roughly $133,425.00/month compared to o1 Pro. For startups and indie developers, that difference can be significant.
Output costs matter too. Mistral Medium 3.5 charges $7.50/1M output tokens vs $600.00 for o1 Pro. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Mistral Medium 3.5 has the edge here at $7.50/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Mistral Medium 3.5 when:
- • Budget is a primary concern
- • You need a larger context window (256,000 tokens)
- • You're already using Mistral AI's API ecosystem
Choose o1 Pro when:
- • You need longer outputs (up to 100,000 tokens)
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
Mistral Medium 3.5
- • Input pricing: $1.50/M tokens
- • Output pricing: $7.50/M tokens
- • Context window: 256,000 tokens
- • Max output: 32,768 tokens
Watch out for
- • Trade-offs are minor in this matchup.
o1 Pro
- • Input pricing: $150.00/M tokens
- • Output pricing: $600.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 100,000 tokens
Watch out for
- • Higher input cost than Mistral Medium 3.5
- • Higher output cost than Mistral Medium 3.5
- • Smaller context window than Mistral Medium 3.5
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Mistral Medium 3.5 (Mistral AI)
o1 Pro (OpenAI)
Start using Mistral Medium 3.5 today
Sign Up for Mistral AI →Start using o1 Pro today
Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, Mistral Medium 3.5 or o1 Pro?▼
What is the context window difference between Mistral Medium 3.5 and o1 Pro?▼
Which model is better for AI Agent / Agentic Workflows?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare Mistral AI and OpenAI API pricing beyond this model matchup?▼
Related Comparisons
Related Articles
Learn when to pick each model, then compare live pricing scenarios.