Phi 4 Reasoning Plus
phi-4-reasoning-plus
Last refreshed 2026-04-19. Next refresh: weekly.
Phi 4 Reasoning Plus is worth evaluating for long context when its provider route and context window match the workload.
Decision context: Long context task fit, 1 tracked provider route, and research from 2026-01-01.
Use it for
- Teams evaluating long context
- Workloads that can use a 128K context window
- Buyers comparing 1 tracked provider route
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
1
Tracked API hosts
Quality / dollar
Unknown
No task benchmark coverage yet
Freshness
2026-01-01
Researched 137d ago
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 |
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 Plus has a 128K-token context window.
Phi 4 Reasoning Plus input tokens at $0.5/1M, output at $0.5/1M.
Capabilities
Benchmark Scores(1)
| Benchmark | Score | Version | Source |
|---|---|---|---|
| Google-Proof Q&A | 68.9 | diamond | https://huggingface.co/microsoft/Phi-4-reasoning-plus |
