ModelRefs / Phi-4 vs o3 Pro
Phi-4 vs o3 Pro
Phi-4 vs o3 Pro: side-by-side benchmarks, pricing, context windows, coding ability and deployment. Pick the right model for your stack.
Overview
o3 Pro: o3 Pro is OpenAI's highest-capability reasoning model, applying extended compute at inference time to solve complex scientific, mathematical, and programming problems. It achieved the highest published scores on ARC-AGI-2 and competitive programming benchmarks at its June 2025 release.
Phi-4: Microsoft's 14B dense decoder-only open-weight text model, trained on 9.8T tokens with a synthetic-data-centered curriculum and available through the microsoft/phi-4 artifact and Microsoft Foundry.
Context window: o3 Pro accepts up to 200,000 tokens, Phi-4 up to 16,384. Confirm the limit for your specific deployment channel before relying on it.
o3 Pro vs Phi-4 at a glance
| Attribute | o3 Pro | Phi-4 |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Released | 2025-06-10 | 2024-12-12 |
| Context window | 200,000 tokens | 16,384 tokens |
| Input price | $20/M tokens | Free / self-hosted |
| Output price | $80/M tokens | Free / self-hosted |
| Licence | Proprietary | MIT |
| Self-hostable | No, hosted only | Yes, open weights |
| Modalities | text, vision | text |
Where they differ most
- Instruction Following: o3 Pro 85%, Phi-4 54%. o3 Pro leads on this dimension.
- Reasoning: o3 Pro 32%, Phi-4 61%. Phi-4 leads on this dimension.
- Coding: o3 Pro 85%, Phi-4 67%. o3 Pro leads on this dimension.
Capability scores are ModelRefs' own derived signals, not vendor claims or benchmark results. Validate against your own workload before relying on them.
Continue your research
Use these connected ModelRefs sections to compare alternatives, inspect implementation paths, and review the evidence and governance boundaries relevant to Phi-4 vs o3 Pro.
Frequently asked questions
Which is better, Phi-4 or o3 Pro?
Phi-4 and o3 Pro target different workloads — see the benchmark and pricing tables for a side-by-side answer.
Is Phi-4 cheaper than o3 Pro?
Compare $0.00000 vs $0.0200 on this page.