Mistral Medium 3.5 API Pricing: Agentic Workhorse at $1.50/$7.50
Mistral Medium 3.5 is designed for long-horizon agentic tasks, synchronous tool-calling, and agentic coding. At $1.50/$7.50, it competes directly with Claude Sonnet 5 for agent workloads.
TL;DR
- Price: $1.50/M input, $7.50/M output — 25% cheaper than Claude Sonnet 5
- Context: 128K tokens — sufficient for most agentic workflows and code generation
- Provider: Mistral API (+ AWS Bedrock, Google Vertex AI)
- Best for: Agentic coding, tool-calling, multi-step workflows, enterprise automation
- Trade-off: Smaller context than Sonnet 5 (128K vs 1M) — choose based on context needs
Mistral Medium 3.5 Pricing Breakdown
Monthly costs at different token volumes (50/50 input/output split):
| Monthly Volume | Input Cost | Output Cost | Total (50/50) |
|---|---|---|---|
| 1M tokens | $1.50 | $7.50 | $4.50 |
| 10M tokens | $15.00 | $75.00 | $45.00 |
| 100M tokens | $150.00 | $750.00 | $450.00 |
| 1B tokens | $1,500.00 | $7,500.00 | $4,500.00 |
At 100M tokens/month with a 50/50 split, Mistral Medium 3.5 costs $450. Cached input tokens get a 90% discount ($0.15/M), which can significantly reduce costs for repetitive agentic workflows.
Mistral Model Family: Medium 3.5 in Context
| Model | Input $/M | Output $/M | Context | Best For |
|---|---|---|---|---|
| Mistral Small 4 | $0.15 | $0.60 | 128K | Budget tasks, high throughput |
| Mistral Large 3 | $0.50 | $1.50 | 262K | General tasks, long context |
| Mistral Medium 3.5 | $1.50 | $7.50 | 128K | Agentic coding, tool-calling |
| Codestral | $0.30 | $0.90 | 256K | Code completion, fill-in-middle |
Decision guide: Choose Small 4 ($0.15/$0.60) for budget tasks. Choose Large 3 ($0.50/$1.50) when context length (262K) matters most. Choose Medium 3.5 ($1.50/$7.50) for agentic workflows requiring tool-calling and iterative reasoning. Choose Codestral ($0.30/$0.90) for code-specific completion tasks.
Mistral Medium 3.5 vs Other Mid-Tier Models
| Model | Input $/M | Output $/M | Context | Provider |
|---|---|---|---|---|
| GPT-5.4 | $2.50 | $15.00 | 400K | OpenAI |
| Mistral Medium 3.5 | $1.50 | $7.50 | 128K | Mistral |
| Claude Sonnet 5 | $2.00 | $10.00 | 1M | Anthropic |
| Gemini 3.1 Pro | $2.00 | $12.00 | 1M | |
| Grok 4.5 | $2.00 | $6.00 | 500K | xAI |
| DeepSeek V4 Pro | $0.66 | $1.98 | 1M | DeepSeek |
Mistral Medium 3.5 is the cheapest mid-tier model at $1.50/$7.50 — 25% cheaper than Sonnet 5 on both input and output. Grok 4.5 ($2/$6) has cheaper output but more expensive input. DeepSeek V4 Pro ($0.66/$1.98) is far cheaper but may not match Medium 3.5's agentic capabilities.
When to Use Mistral Medium 3.5
🤖 Agentic Coding
Build coding agents that write, test, and iterate on code. Medium 3.5's synchronous tool-calling makes it ideal for multi-step development workflows.
🔧 Tool-Calling Workflows
Automate tasks that require calling APIs, databases, or external services. Designed for synchronous tool-calling with reliable output formatting.
📊 Enterprise Automation
Build internal tools that process data, generate reports, and make decisions. EU data sovereignty makes it ideal for European enterprises.
💬 Multi-Turn Conversations
Build chatbots that maintain context across long conversations. 128K context handles extended dialogues with ease.
📝 Document Processing
Analyze, summarize, and extract information from documents. Balanced pricing makes it cost-effective for mixed input/output workloads.
🔄 Workflow Orchestration
Coordinate multiple AI agents or services. Medium 3.5's reasoning capabilities make it a strong orchestrator for complex multi-step tasks.
Real-World Cost: 10K Agentic Coding Tasks/Month
Suppose you're building an AI coding assistant that handles 10,000 coding tasks per month, averaging 2,000 input tokens (code context + instructions) and 1,500 output tokens (code changes + explanations) per request:
| Model | Input Cost | Output Cost | Monthly Total |
|---|---|---|---|
| DeepSeek V4 Pro | $13.20 | $29.70 | $42.90 |
| Mistral Large 3 | $10.00 | $22.50 | $32.50 |
| Mistral Medium 3.5 | $30.00 | $112.50 | $142.50 |
| Claude Sonnet 5 | $40.00 | $150.00 | $190.00 |
| GPT-5.4 | $50.00 | $225.00 | $275.00 |
Mistral Medium 3.5 at $142.50/month is 25% cheaper than Claude Sonnet 5 ($190) and 48% cheaper than GPT-5.4 ($275) for agentic coding tasks. If quality is sufficient, DeepSeek V4 Pro ($42.90) or Mistral Large 3 ($32.50) offer even lower costs.
Compare 95 AI Models Side by Side
Mistral Medium 3.5 is one of 95 models tracked on APIpulse. Compare pricing, context windows, and features across 11 providers.
Frequently Asked Questions
Related Pages
- Mistral Large 3 Pricing — Budget general-purpose at $0.50/$1.50
- Mistral Small 4 Pricing — Cheapest Mistral at $0.15/$0.60
- Codestral Pricing — Code-specialized at $0.30/$0.90
- Claude Haiku 4.5 Pricing — Anthropic's budget option at $1.00/$5.00
- Full Model Rankings — All 95 models ranked by price