Mistral Medium 3 vs Mistral Medium 3.5: Which is Better in 2026?
A comprehensive comparison of Mistral Medium 3 and Mistral Medium 3.5 covering features, pricing, use cases, and which tool is the right choice for your needs.
⚡ Quick Verdict
Choose Mistral Medium 3 if:
- →You want more affordable paid plans (from $0.4/mo)
- →You need 74.5% on mmlu-pro — competitive with gpt-4o and claude sonnet 3.7 at launch or 128k context window — suitable for long-document analysis and large codebase ingestion
Choose Mistral Medium 3.5 if:
- →You want a free tier to get started without commitment
- →You need 128b dense model (merged: instruction-following + reasoning + coding) or 256k token context window
Mistral Medium 3 vs Mistral Medium 3.5: At a Glance
Pricing Comparison: Mistral Medium 3 vs Mistral Medium 3.5
Understanding the pricing differences between Mistral Medium 3 and Mistral Medium 3.5 is crucial for making the right choice. Here's how their plans compare side by side.
💡 Pricing takeaway: Mistral Medium 3.5 has an edge with a free tier, letting you start without commitment. Compare the specific plans to find the best value for your use case.
Feature-by-Feature Comparison
Here's how every feature from Mistral Medium 3 and Mistral Medium 3.5 stacks up.
What Makes Each Tool Unique
🔵 Unique to Mistral Medium 3
Features available in Mistral Medium 3 but not in Mistral Medium 3.5:
- ✓74.5% on MMLU-Pro — competitive with GPT-4o and Claude Sonnet 3.7 at launch
- ✓128K context window — suitable for long-document analysis and large codebase ingestion
- ✓Multimodal vision via Pixtral architecture — image understanding built in, no separate model required
- ✓40+ language support — strong multilingual coverage for global enterprise use cases
- ✓Strong coding performance: top-tier on HumanEval and LiveCodeBench at mid-tier pricing
- ✓Available on major cloud marketplaces: AWS Bedrock, Azure AI Foundry, Google Vertex AI
- ✓Tool use and function calling — ready for agentic workflows and API integrations
- ✓Fine-tuning available for enterprise customers via Mistral La Plateforme
- ✓Priced 5–10× cheaper than GPT-4o and Claude Sonnet at equivalent capability tier
🟣 Unique to Mistral Medium 3.5
Features available in Mistral Medium 3.5 but not in Mistral Medium 3:
- ✓128B dense model (merged: instruction-following + reasoning + coding)
- ✓256k token context window
- ✓77.6% on SWE-Bench Verified (beats Devstral 2 and Qwen3.5 397B A17B)
- ✓91.4 on τ³-Telecom (strong agentic capabilities)
- ✓Configurable reasoning effort per request
- ✓Vision encoder trained from scratch — handles variable image sizes and aspect ratios
- ✓Open weights under modified MIT license (self-hostable on 4 GPUs)
- ✓Powers Mistral Vibe remote coding agents and Le Chat Work mode
- ✓Async cloud coding sessions with GitHub, Linear, Jira, Sentry integrations
Use Case Recommendations
Best for: Mistral Medium 3
Mistral AI's enterprise-grade mid-tier model released May 7, 2025. Positioned as 'medium is the new large' — delivers GPT-4o and Claude Sonnet 3.7-level performance at a fraction of the cost: $0.40/M input, $2.00/M output. 128K context window, multimodal (vision via Pixtral architecture), and strong on coding (MMLU-Pro 74.5%), STEM reasoning, and multilingual tasks across 40+ languages. Available via Mistral La Plateforme API, Amazon Bedrock, Azure AI, and Google Cloud Vertex AI.
Ideal use cases:
- •Teams or individuals who need 74.5% on mmlu-pro — competitive with gpt-4o and claude sonnet 3.7 at launch
- •Teams or individuals who need 128k context window — suitable for long-document analysis and large codebase ingestion
- •Teams or individuals who need multimodal vision via pixtral architecture — image understanding built in, no separate model required
- •Teams or individuals who need 40+ language support — strong multilingual coverage for global enterprise use cases
- •Anyone focused on mistral workflows
- •Anyone focused on llm workflows
Best for: Mistral Medium 3.5
Mistral's first flagship merged model, released May 22, 2026. A dense 128B model with a 256k context window that handles instruction-following, reasoning, and coding in a single set of weights. Available as open weights (modified MIT license) and powers Mistral Vibe remote coding agents and Le Chat's new Work mode. SWE-Bench Verified: 77.6%. API: $1.5/M input, $7.5/M output.
Ideal use cases:
- •Teams or individuals who need 128b dense model (merged: instruction-following + reasoning + coding)
- •Teams or individuals who need 256k token context window
- •Teams or individuals who need 77.6% on swe-bench verified (beats devstral 2 and qwen3.5 397b a17b)
- •Teams or individuals who need 91.4 on τ³-telecom (strong agentic capabilities)
- •Anyone focused on mistral workflows
- •Anyone focused on llm workflows
🔧 Other llm-apis Tools to Consider
Mistral Medium 3 and Mistral Medium 3.5 aren't the only options. Here are other popular tools in the same space:
Claude Opus 4.8
Anthropic's flagship model — stronger coding, agents, and honesty
Mistral Small 4
Mistral's unified open-source model — reasoning + vision + coding, Apache 2.0
Mistral Small 3.1
Mistral's 24B multimodal open-source model — beats GPT-4o Mini, Apache 2.0
Mistral 3
Mistral's MoE flagship + edge model family — Apache 2.0, multimodal, reasoning
North Mini Code
Cohere's open-source agentic coding model — 30B MoE, 3B active, Apache 2.0
Codestral 25.08
Mistral's low-latency code completion model — FIM, 80+ languages, 256k context
Frequently Asked Questions
Is Mistral Medium 3 better than Mistral Medium 3.5?
It depends on your needs. Mistral Medium 3 offers 9 key features including 74.5% on MMLU-Pro — competitive with GPT-4o and Claude Sonnet 3.7 at launch and 128K context window — suitable for long-document analysis and large codebase ingestion, while Mistral Medium 3.5 provides 9 features including 128B dense model (merged: instruction-following + reasoning + coding) and 256k token context window. Mistral Medium 3 uses a paid model, while Mistral Medium 3.5 is freemium with free access available. Choose based on which features and pricing model align with your requirements.
Is Mistral Medium 3 cheaper than Mistral Medium 3.5?
Mistral Medium 3 is cheaper, starting at $0.40/month compared to Mistral Medium 3.5's $1.5/month. Mistral Medium 3.5 offers a free tier, making it easier to get started. Always check the official websites for the most current pricing.
Can I use Mistral Medium 3 and Mistral Medium 3.5 together?
Yes, many users combine Mistral Medium 3 and Mistral Medium 3.5 in their workflow. Mistral Medium 3 excels at 74.5% on mmlu-pro — competitive with gpt-4o and claude sonnet 3.7 at launch, while Mistral Medium 3.5 shines with 128b dense model (merged: instruction-following + reasoning + coding). Using both allows you to leverage the strengths of each tool, though this means managing two subscriptions — though free tiers can help manage costs.
What's the main difference between Mistral Medium 3 and Mistral Medium 3.5?
While both are llm-apis tools, Mistral Medium 3 emphasizes 74.5% on mmlu-pro — competitive with gpt-4o and claude sonnet 3.7 at launch, whereas Mistral Medium 3.5 is known for 128b dense model (merged: instruction-following + reasoning + coding). The best choice depends on your specific workflow and feature priorities.