Last refreshed 2026-05-19. Next refresh: weekly.
Why use Phi 4 Reasoning Plus on Microsoft Foundry?
Microsoft Foundry offers Phi 4 Reasoning Plus with pay-as-you-go pricing at $0.13/1M input tokens. Microsoft Foundry is a unified Azure platform-as-a-service offering for enterprise AI operations, model builders, and application development.
Compare Phi 4 Reasoning Plus across 2 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: microsoft:phi4reasoningplusmicrosoft:phi4reasoningplusRequest example
microsoft:phi4reasoningplus.Gotchas
- Use provider model ID "microsoft:phi4reasoningplus", not the LLMReference slug "phi-4-reasoning-plus".
Compare Phi 4 Reasoning Plus Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Fireworks AI | $0.50 | $0.50 |
| Microsoft Foundry | $0.13 | $0.50 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.13 |
| Output tokens | $0.50 |
Capabilities
About Phi 4 Reasoning Plus
Phi 4 Reasoning Plus is Microsoft Research's Phi-4 model focused on step-by-step reasoning. It offers a 128K-token context window with weights openly available for self-hosting and scores 68.9 on GPQA.
FAQ
What does Phi 4 Reasoning Plus cost on Microsoft Foundry?
On Microsoft Foundry, Phi 4 Reasoning Plus costs $0.125 per 1M input tokens and $0.50 per 1M output tokens.
What is the context window for Phi 4 Reasoning Plus on Microsoft Foundry?
Phi 4 Reasoning Plus supports a 128k token context window on Microsoft Foundry.
How does Microsoft Foundry compare to other Phi 4 Reasoning Plus providers?
Phi 4 Reasoning Plus is available from 2 providers. The cheapest input pricing is $0.125/1M tokens from Microsoft Foundry.
What API model ID do I use for Phi 4 Reasoning Plus on Microsoft Foundry?
Use the model ID microsoft:phi4reasoningplus when calling Microsoft Foundry's API.
Who created Phi 4 Reasoning Plus?
Phi 4 Reasoning Plus was created by Microsoft Research as part of the Phi-4 model family.
Is Phi 4 Reasoning Plus open source?
Phi 4 Reasoning Plus is open source according to the seed data.