Phi 4 Reasoning
phi-4-reasoning
Last refreshed 2026-05-16. Next refresh: weekly.
Open SourceLong context
Phi 4 Reasoning is worth evaluating for long context when its provider route and context window match the workload.
Decision context: Long context task fit, 2 tracked provider routes, and research from 2026-01-01.
Use it for
- Teams evaluating long context
- Workloads that can use a 128K context window
- Buyers comparing 2 tracked provider routes
Do not use it for
- Vision or document-understanding workloads
- Strict JSON or tool-calling flows
Cheapest output
$0.500
Fireworks AI per 1M tokens
Provider routes
2
Tracked API hosts
Quality / dollar
Unknown
No task benchmark coverage yet
Freshness
2026-01-01
Researched 137d ago
stale
Top use-case fit
Long context
Included by capability and metadata signals in the decision map.
Provider price ladder
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| Fireworks AI | $0.500 | $0.500 | Serverless |
| Microsoft Foundry | - | - | ServerlessPartial |
Benchmark peer barsfor Long context
No task-mapped benchmark peers are available for this model yet.
Migration checks
No linked migration route is available for this model yet.
About
Phi 4 Reasoning has a 128K-token context window.
Phi 4 Reasoning input tokens at $0.5/1M, output at $0.5/1M.
Capabilities
Reasoning
Benchmark Scores(1)
Scores are benchmark-specific and are direction-aware: the same numeric gap can mean very different outcomes across suites. Use the leaderboard context and this model's provider route to decide whether the winning margin is meaningful for your workload.
| Benchmark | Score | Version | Source |
|---|---|---|---|
| Google-Proof Q&A | 65.8 | diamond | https://huggingface.co/microsoft/Phi-4-reasoning-plus |
