Mistral Large 3 675B Instruct vs Phi-4 Mini Reasoning
Mistral Large 3 675B Instruct (2025) and Phi-4 Mini Reasoning (2026) are frontier reasoning models from MistralAI and Microsoft Research. Mistral Large 3 675B Instruct ships a 128K-token context window, while Phi-4 Mini Reasoning ships a 128K-token context window. On Google-Proof Q&A, Phi-4 Mini Reasoning leads by 8.1 pts. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Phi-4 Mini Reasoning is safer overall; choose Mistral Large 3 675B Instruct when provider fit matters.
Decision scorecard
Local evidence first| Signal | Mistral Large 3 675B Instruct | Phi-4 Mini Reasoning |
|---|---|---|
| Best for | provider-routed production | reasoning-heavy apps |
| Decision fit | Coding, RAG, and Agents | Long context |
| Context window | 128K | 128K |
| Cheapest output | $1.50/1M tokens | - |
| Provider routes | 5 tracked | 0 tracked |
| Shared benchmarks | 1 rows | Google-Proof Q&A leader |
Decision tradeoffs
- Mistral Large 3 675B Instruct has broader tracked provider coverage for fallback and procurement flexibility.
- Mistral Large 3 675B Instruct uniquely exposes Structured outputs in local model data.
- Local decision data tags Mistral Large 3 675B Instruct for Coding, RAG, and Agents.
- Phi-4 Mini Reasoning leads the largest shared benchmark signal on Google-Proof Q&A by 8.1 points.
- Phi-4 Mini Reasoning uniquely exposes Reasoning in local model data.
- Local decision data tags Phi-4 Mini 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 Large 3 675B Instruct
$775
Cheapest tracked route/tier: AWS Bedrock
Phi-4 Mini 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
- No overlapping tracked provider route is sourced for Mistral Large 3 675B Instruct and Phi-4 Mini Reasoning; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs before moving production traffic.
- Phi-4 Mini Reasoning adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Phi-4 Mini Reasoning and Mistral Large 3 675B Instruct; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning before moving production traffic.
- Mistral Large 3 675B Instruct adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-12-01 | 2026-05-16 |
| Context window | 128K | 128K |
| Parameters | 675B | 3.8B |
| Architecture | decoder only | - |
| License | 1 | Proprietary |
| Knowledge cutoff | 2024-11 | 2025-02 |
Pricing and availability
| Pricing attribute | Mistral Large 3 675B Instruct | Phi-4 Mini Reasoning |
|---|---|---|
| Input price | $0.50/1M tokens | - |
| Output price | $1.50/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Mistral Large 3 675B Instruct | Phi-4 Mini Reasoning |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | Yes |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | Yes | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Mistral Large 3 675B Instruct | Phi-4 Mini Reasoning |
|---|---|---|
| Google-Proof Q&A | 43.9 | 52.0 |
Deep dive
On shared benchmark coverage, Google-Proof Q&A has Mistral Large 3 675B Instruct at 43.9 and Phi-4 Mini Reasoning at 52, with Phi-4 Mini Reasoning ahead by 8.1 points. The largest visible gap is 8.1 points on Google-Proof Q&A, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on reasoning mode: Phi-4 Mini Reasoning and structured outputs: Mistral Large 3 675B Instruct. Both models share the core language-model surface, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
Pricing coverage is uneven: Mistral Large 3 675B Instruct has $0.50/1M input tokens and Phi-4 Mini Reasoning has no token price sourced yet. Provider availability is 5 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Mistral Large 3 675B Instruct when provider fit and broader provider choice are central to the workload. Choose Phi-4 Mini Reasoning when reasoning depth are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Mistral Large 3 675B Instruct or Phi-4 Mini Reasoning?
Mistral Large 3 675B Instruct supports 128K tokens, while Phi-4 Mini Reasoning supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Mistral Large 3 675B Instruct or Phi-4 Mini Reasoning open source?
Mistral Large 3 675B Instruct is listed under 1. Phi-4 Mini Reasoning is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for reasoning mode, Mistral Large 3 675B Instruct or Phi-4 Mini Reasoning?
Phi-4 Mini Reasoning has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for structured outputs, Mistral Large 3 675B Instruct or Phi-4 Mini Reasoning?
Mistral Large 3 675B Instruct has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Mistral Large 3 675B Instruct and Phi-4 Mini Reasoning?
Mistral Large 3 675B Instruct is available on AWS Bedrock, NVIDIA NIM, Mistral AI Studio, Microsoft Foundry, and Vercel AI Gateway. Phi-4 Mini Reasoning is available on the tracked providers still being sourced. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
When should I pick Mistral Large 3 675B Instruct over Phi-4 Mini Reasoning?
Phi-4 Mini Reasoning is safer overall; choose Mistral Large 3 675B Instruct when provider fit matters. If your workload also depends on provider fit, start with Mistral Large 3 675B Instruct; if it depends on reasoning depth, run the same evaluation with Phi-4 Mini Reasoning.
Continue comparing
Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.