GPT-4o vs Phi-4 Mini Flash Reasoning
GPT-4o (2024) and Phi-4 Mini Flash Reasoning (2025) are frontier reasoning models from OpenAI and Microsoft Research. GPT-4o ships a 128k-token context window, while Phi-4 Mini Flash Reasoning ships 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.
Phi-4 Mini Flash Reasoning is safer overall; choose GPT-4o when coding workflow support matters.
Decision scorecard
Local evidence first| Signal | GPT-4o | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Best for | multimodal apps, tool-calling agents, and provider-routed production | reasoning-heavy apps |
| Decision fit | Coding, RAG, and Agents | Long context |
| Context window | 128k | 128k |
| Cheapest output | $10/1M tokens | - |
| Provider routes | 5 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- GPT-4o has broader tracked provider coverage for fallback and route flexibility.
- GPT-4o uniquely exposes Vision, Multimodal, and JSON / Tool use in local model data.
- Local decision data tags GPT-4o for Coding, RAG, and Agents.
- 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.
GPT-4o
$4,500
Cheapest tracked route/tier: Replicate API
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
- No overlapping tracked provider route is sourced for GPT-4o and Phi-4 Mini Flash Reasoning; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision, Multimodal, and JSON / Tool use before moving production traffic.
- Phi-4 Mini Flash Reasoning adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Phi-4 Mini Flash Reasoning and GPT-4o; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning before moving production traffic.
- GPT-4o adds Vision, Multimodal, and JSON / Tool use in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-05-13 | 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 | 2023-10 | 2025-02 |
Pricing and availability
| Pricing attribute | GPT-4o | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Input price | $2.50/1M tokens | - |
| Output price | $10/1M tokens | - |
| Providers |
Capabilities
| Capability | GPT-4o | Phi-4 Mini Flash Reasoning |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | No | Yes |
| JSON / Tool use | Yes | No |
| Structured outputs | Yes | No |
| Code execution | Yes | 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
- 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
- Llama 3 8B Instruct vs Phi-4 Mini Flash Reasoning
- Llama 3.2 1B Instruct vs Phi-4 Mini Flash Reasoning
- Phi 3.5 Vision Instruct vs Phi-4 Mini Flash Reasoning
Popular comparisons for GPT-4o
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: 2026-06-29. Data sourced from public model cards and provider documentation.