Compare / head-to-head
GPT-5.6 LunavsGPT-5.6 Sol
GPT-5.6 Sol leads 7 of 7 shared benchmarks. GPT-5.6 Luna is 17.1x cheaper per token. Both offer a 1.1M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 7
GPT-5.6 Sol leads
Cheaper per token
GPT-5.6 Luna
17.1x cheaper, input + output
Larger context
Tie
both 1.1M tokens
Provider uptime (30d)
95.1368%
OpenAI
GPT-5.6 Luna
OpenAI · released 2026-07-09
textvision
GPT-5.6 Sol
OpenAI · released 2026-07-09
textvision
Quality
Benchmark matrix
7 shared · 0 only GPT-5.6 Luna · 0 only GPT-5.6 Sol| Benchmark | GPT-5.6 Luna | GPT-5.6 Sol | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 7 | ||||
| GPQA Diamond | 92.3% ↗ | 94.6% ↗ | -2.3 pt | GPT-5.6 Sol |
| DeepSWE v1.1 | 67.2% ↗ | 72.7% ↗ | -5.5 pt | GPT-5.6 Sol |
| FrontierMath Tier 4 v2 (Epoch AI run) | 61% ↗epoch | 82.9% ↗epoch | -21.9 pt | GPT-5.6 Sol |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 82.1% ↗epoch | 89.1% ↗epoch | -7 pt | GPT-5.6 Sol |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 98.3% ↗epoch | 100% ↗epoch | -1.7 pt | GPT-5.6 Sol |
| SimpleQA Verified | 41% ↗epoch | 69.7% ↗epoch | -28.7 pt | GPT-5.6 Sol |
| SWE-Bench Pro | 62.7% ↗ | 64.6% ↗ | -1.9 pt | GPT-5.6 Sol |
| Only GPT-5.6 Luna reports · 0 | ||||
| GPT-5.6 Luna reports nothing GPT-5.6 Sol does not. | ||||
| Only GPT-5.6 Sol reports · 0 | ||||
| GPT-5.6 Sol reports nothing GPT-5.6 Luna does not. | ||||
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-5.6 Luna minus GPT-5.6 Sol 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-5.6 Luna | GPT-5.6 Sol | Edge |
|---|---|---|---|
| Context window | 1.1M tokens | 1.1M tokens | Tie |
| Max output | 128K tokens | 128K tokens | Tie |
| Input price / 1M | $0.2 ↗ | $4 ↗ | GPT-5.6 Luna |
| Output price / 1M | $1.2 ↗ | $20 ↗ | GPT-5.6 Luna |
| Cached input / 1M | $0.02 ↗ | $0.4 ↗ | GPT-5.6 Luna |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $1.4 | $24 | GPT-5.6 Luna |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-07-09 | 2026-07-09 | — |
| Cited benchmark scores | 8 | 8 | — |
Reliability
OpenAI status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-5.6 Luna vs …
Models sharing the most benchmarksMore matchups
GPT-5.6 Sol vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-5.6 Luna and GPT-5.6 Sol on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.