Compare / head-to-head
GPT-5.4 nanovsGPT-5.5
GPT-5.5 leads 8 of 9 shared benchmarks. GPT-5.4 nano is 24.1x cheaper per token. GPT-5.5 has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 8
GPT-5.5 leads
Cheaper per token
GPT-5.4 nano
24.1x cheaper, input + output
Larger context
GPT-5.5
1M tokens
Provider uptime (30d)
94.2446%
OpenAI
GPT-5.4 nano
OpenAI · released 2026-03-17
textvision
Quality
Benchmark matrix
9 shared · 0 only GPT-5.4 nano · 12 only GPT-5.5| Benchmark | GPT-5.4 nano | GPT-5.5 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 9 | ||||
| GPQA Diamond | 82.8% ↗ | 90.7% ↗epoch | -7.9 pt | GPT-5.5 |
| FrontierMath Tier 4 v2 (Epoch AI run) | 12.2% ↗epoch | 72.5% ↗epoch | -60.3 pt | GPT-5.5 |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 44.9% ↗epoch | 85.3% ↗epoch | -40.4 pt | GPT-5.5 |
| OSWorld-Verified | 39% ↗ | 78.7% ↗ | -39.7 pt | GPT-5.5 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 87.8% ↗epoch | 84.4% ↗epoch | +3.4 pt | GPT-5.4 nano |
| SimpleQA Verified | 11.7% ↗epoch | 63% ↗epoch | -51.3 pt | GPT-5.5 |
| SWE-Bench Pro | 52.4% ↗ | 58.6% ↗ | -6.2 pt | GPT-5.5 |
| Terminal-Bench 2.0 | 46.3% ↗ | 82.7% ↗ | -36.4 pt | GPT-5.5 |
| Toolathlon | 35.5% ↗ | 55.6% ↗ | -20.1 pt | GPT-5.5 |
| Only GPT-5.4 nano reports · 0 | ||||
| GPT-5.4 nano reports nothing GPT-5.5 does not. | ||||
| Only GPT-5.5 reports · 12 | ||||
| AIME 2026 | not reported | 100% ↗matharena ⚠ | — | — |
| LMArena Elo | not reported | 1465.6 ↗ | — | — |
| ARC-AGI-1 (Verified) | not reported | 95% ↗ | — | — |
| ARC-AGI-2 (Verified) | not reported | 85% ↗ | — | — |
| BrowseComp | not reported | 84.4% ↗ | — | — |
| FrontierMath Tier 1-3 | not reported | 51.7% ↗ | — | — |
| FrontierMath Tier 4 | not reported | 35.4% ↗ | — | — |
| GDPval (wins or ties) | not reported | 84.9% ↗ | — | — |
| MCP Atlas | not reported | 75.3% ↗ | — | — |
| MMMU-Pro (no tools) | not reported | 81.2% ↗ | — | — |
| MMMU-Pro (with tools) | not reported | 83.2% ↗ | — | — |
| Tau2-bench Telecom | not reported | 98% ↗ | — | — |
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-5.4 nano minus GPT-5.5 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-5.4 nano | GPT-5.5 | Edge |
|---|---|---|---|
| Context window | 400K tokens | 1M tokens | GPT-5.5 |
| Max output | 128K tokens | 128K tokens | Tie |
| Input price / 1M | $0.2 ↗ | $5 ↗ | GPT-5.4 nano |
| Output price / 1M | $1.25 ↗ | $30 ↗ | GPT-5.4 nano |
| Cached input / 1M | $0.02 ↗ | $0.5 ↗ | GPT-5.4 nano |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $1.45 | $35 | GPT-5.4 nano |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-03-17 | 2026-04-23 | — |
| Cited benchmark scores | 10 | 21 | — |
Reliability
OpenAI status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-5.4 nano vs …
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GPT-5.5 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-5.4 nano and GPT-5.5 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.