Compare / head-to-head
GPT-5 nanovsPhi-4 Reasoning
GPT-5 nano leads 2 of 2 shared benchmarks. GPT-5 nano has the larger context window (400K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
2 – 0
GPT-5 nano leads
Cheaper per token
—
list price, input + output
Larger context
GPT-5 nano
400K tokens
Provider uptime (30d)
95.092% · —
OpenAI · Microsoft
GPT-5 nano
OpenAI · released 2025-08-07
textvision
Phi-4 Reasoning
Microsoft · released 2025-04-30
text
- Context
- 33K
- Max out
- 33K
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 4 · 4 core
Quality
Benchmark matrix
2 shared · 5 only GPT-5 nano · 2 only Phi-4 Reasoning| Benchmark | GPT-5 nano | Phi-4 Reasoning | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 2 | ||||
| GPQA Diamond | 69.4% ↗epoch | 65.8% ↗ | +3.6 pt | GPT-5 nano |
| AIME 2025 | 85% ↗matharena ⚠ | 62.9% ↗ | +22.1 pt | GPT-5 nano |
| Only GPT-5 nano reports · 5 | ||||
| SWE-bench Verified | 54.7% ↗ | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 2.4% ↗epoch | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 20% ↗epoch | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 81.1% ↗epoch | not reported | — | — |
| SimpleQA Verified | 11.7% ↗epoch | not reported | — | — |
| Only Phi-4 Reasoning reports · 2 | ||||
| MMLU-Pro | not reported | 74.3% ↗ | — | — |
| HumanEval+ | not reported | 92.9% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is GPT-5 nano minus Phi-4 Reasoning in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | GPT-5 nano | Phi-4 Reasoning | Edge |
|---|---|---|---|
| Context window | 400K tokens | 33K tokens | GPT-5 nano |
| Max output | 128K tokens | 33K tokens | GPT-5 nano |
| Input price / 1M | $0.05 ↗ | — | — |
| Output price / 1M | $0.4 ↗ | — | — |
| Cached input / 1M | $0.005 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.45 | — | — |
| Modalities | text · vision | text | GPT-5 nano |
| Released | 2025-08-07 | 2025-04-30 | — |
| Cited benchmark scores | 7 | 4 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-5 nano vs …
Models sharing the most benchmarksMore matchups
Phi-4 Reasoning vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-5 nano and Phi-4 Reasoning on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.