Compare / head-to-head
GPT-4.1 nanovsGPT-5.6 Luna
GPT-5.6 Luna leads 3 of 3 shared benchmarks. GPT-4.1 nano is 2.8x cheaper per token. GPT-5.6 Luna has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 3
GPT-5.6 Luna leads
Cheaper per token
GPT-4.1 nano
2.8x cheaper, input + output
Larger context
GPT-5.6 Luna
1.1M tokens
Provider uptime (30d)
95.4155%
OpenAI
GPT-4.1 nano
OpenAI · released 2025-04-14
textvision
GPT-5.6 Luna
OpenAI · released 2026-07-09
textvision
Quality
Benchmark matrix
3 shared · 3 only GPT-4.1 nano · 4 only GPT-5.6 Luna| Benchmark | GPT-4.1 nano | GPT-5.6 Luna | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 3 | ||||
| GPQA Diamond | 50.3% ↗ | 92.3% ↗ | -42 pt | GPT-5.6 Luna |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 28.9% ↗epoch | 98.3% ↗epoch | -69.4 pt | GPT-5.6 Luna |
| SimpleQA Verified | 6% ↗epoch | 41% ↗epoch | -35 pt | GPT-5.6 Luna |
| Only GPT-4.1 nano reports · 3 | ||||
| MMLU | 80.1% ↗ | not reported | — | — |
| Aider Polyglot | 9.8% ↗ | not reported | — | — |
| AIME 2024 | 29.4% ↗ | not reported | — | — |
| Only GPT-5.6 Luna reports · 4 | ||||
| DeepSWE v1.1 | not reported | 67.2% ↗ | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 61% ↗epoch | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 82.1% ↗epoch | — | — |
| SWE-Bench Pro | not reported | 62.7% ↗ | — | — |
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-4.1 nano minus GPT-5.6 Luna 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-4.1 nano | GPT-5.6 Luna | Edge |
|---|---|---|---|
| Context window | 1.0M tokens | 1.1M tokens | GPT-5.6 Luna |
| Max output | 33K tokens | 128K tokens | GPT-5.6 Luna |
| Input price / 1M | $0.1 ↗ | $0.2 ↗ | GPT-4.1 nano |
| Output price / 1M | $0.4 ↗ | $1.2 ↗ | GPT-4.1 nano |
| Cached input / 1M | $0.025 ↗ | $0.02 ↗ | GPT-5.6 Luna |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.5 | $1.4 | GPT-4.1 nano |
| Modalities | text · vision | text · vision | Tie |
| Released | 2025-04-14 | 2026-07-09 | — |
| Cited benchmark scores | 7 | 8 | — |
Reliability
OpenAI status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-4.1 nano vs …
Models sharing the most benchmarksMore matchups
GPT-5.6 Luna vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-4.1 nano and GPT-5.6 Luna on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.