Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI. It supports text and image inputs with text output, and is designed for agentic workflows, coding, and complex...
Model details →Mistral: Mistral Medium 3.5 vs OpenAI: o4 Mini Deep Research
Mistral: Mistral Medium 3.5 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
o4-mini-deep-research is OpenAI's faster, more affordable deep research model—ideal for tackling complex, multi-step research tasks. Note: This model always uses the 'web_search' tool which adds additional cost.
Model details →Side-by-side comparison
| Capability | Mistral: Mistral Medium 3.5 | OpenAI: o4 Mini Deep Research | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 262K | 200K | 🏆 Mistral: Mistral Medium 3.5 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.50 | $2.00 | 🏆 Mistral: Mistral Medium 3.5 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $7.50 | $8.00 | 🏆 Mistral: Mistral Medium 3.5 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Mistral: Mistral Medium 3.5 better than OpenAI: o4 Mini Deep Research?
Mistral: Mistral Medium 3.5 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Mistral: Mistral Medium 3.5 and OpenAI: o4 Mini Deep Research?
Input: $1.50 vs $2.00 per 1M tokens. Output: $7.50 vs $8.00 per 1M tokens.
What context windows do Mistral: Mistral Medium 3.5 and OpenAI: o4 Mini Deep Research support?
Mistral: Mistral Medium 3.5 supports up to 262K tokens. OpenAI: o4 Mini Deep Research supports up to 200K tokens.
Do both Mistral: Mistral Medium 3.5 and OpenAI: o4 Mini Deep Research support tool calling?
Mistral: Mistral Medium 3.5: yes. OpenAI: o4 Mini Deep Research: yes.
Compare Mistral: Mistral Medium 3.5 with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest