Mistral Medium 3 Instruct vs Phi-4 Mini Flash Reasoning
Mistral Medium 3 Instruct (2025) and Phi-4 Mini Flash Reasoning (2025) are frontier reasoning models from MistralAI and Microsoft Research. Both ship a 128k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads. It focuses on practical selection signals rather than broad model-family marketing. The goal is to make the tradeoff clear before deeper testing.
Phi-4 Mini Flash Reasoning is safer overall; choose Mistral Medium 3 Instruct when vision-heavy evaluation matters.
Decision scorecard
Local evidence first| Signal | Mistral Medium 3 Instruct | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Best for | multimodal apps and provider-routed production | reasoning-heavy apps |
| Decision fit | Long context and Vision | Long context |
| Context window | 128k | 128k |
| Cheapest output | $2/1M tokens | - |
| Provider routes | 2 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Mistral Medium 3 Instruct has broader tracked provider coverage for fallback and route flexibility.
- Mistral Medium 3 Instruct uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Mistral Medium 3 Instruct for Long context and Vision.
- Phi-4 Mini Flash Reasoning uniquely exposes Reasoning in local model data.
- Local decision data tags Phi-4 Mini Flash Reasoning for Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Mistral Medium 3 Instruct
$820
Cheapest tracked route/tier: Mistral AI Studio
Phi-4 Mini Flash Reasoning
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- Provider overlap exists on NVIDIA NIM; start route-level A/B tests there.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
- Phi-4 Mini Flash Reasoning adds Reasoning in local capability data.
- Provider overlap exists on NVIDIA NIM; start route-level A/B tests there.
- Check replacement coverage for Reasoning before moving production traffic.
- Mistral Medium 3 Instruct adds Vision and Multimodal in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-10-01 | 2025-12-01 |
| Context window | 128k | 128k |
| Parameters | — | 3.8B |
| Architecture | Decoder Only | Decoder Only |
| License | Proprietary | MITOSI-approved |
| Openness | Proprietary | Open source |
| Weights | Not released | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | 2025-03 | 2025-02 |
Pricing and availability
| Pricing attribute | Mistral Medium 3 Instruct | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Input price | $0.40/1M tokens | - |
| Output price | $2/1M tokens | - |
| Providers |
Capabilities
| Capability | Mistral Medium 3 Instruct | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | Yes |
| JSON / Tool use | No | No |
| Structured outputs | No | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Continue comparing
- Magistral Small 2506 vs Mistral Medium 3 Instruct
- Phi-4 Mini Flash Reasoning vs Qwen3.5-9B
- Together AI - Gemma 3n-e4B vs Phi-4 Mini Flash Reasoning
- Gemma 2 9B SahabatAI Instruct vs Phi-4 Mini Flash Reasoning
- ByteDance Doubao Seed 2.0 Pro vs Phi-4 Mini Flash Reasoning
- Codex 1 vs Mistral Medium 3 Instruct
- Llama 3 8B Instruct vs Phi-4 Mini Flash Reasoning
Popular comparisons for Mistral Medium 3 Instruct
Popular comparisons for Phi-4 Mini Flash Reasoning
- Phi-4 Mini Flash Reasoning vs Qwen3.5-9B
- Phi-4 Mini Flash Reasoning vs Together AI - Gemma 3n-e4B
- Phi-4 Mini Flash Reasoning vs Gemma 2 9B SahabatAI Instruct
- Phi-4 Mini Flash Reasoning vs ByteDance Doubao Seed 2.0 Pro
- Phi-4 Mini Flash Reasoning vs Llama 3 8B Instruct
- Phi-4 Mini Flash Reasoning vs Llama 3.2 1B Instruct
Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.