Compare / head-to-head
GPT-5.1vsGPT-5 mini
GPT-5.1 leads 5 of 5 shared benchmarks. GPT-5 mini is 5x cheaper per token. Both offer a 400K-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
5 – 0
GPT-5.1 leads
Cheaper per token
GPT-5 mini
5x cheaper, input + output
Larger context
Tie
both 400K tokens
Provider uptime (30d)
94.2446%
OpenAI
GPT-5.1
OpenAI · released 2025-11-13
textvision
GPT-5 mini
OpenAI · released 2025-08-07
textvision
Quality
Benchmark matrix
5 shared · 1 only GPT-5.1 · 3 only GPT-5 mini| Benchmark | GPT-5.1 | GPT-5 mini | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 5 | ||||
| GPQA Diamond | 87.6% ↗epoch | 81.6% ↗ | +6 pt | GPT-5.1 |
| AIME 2025 | 94.2% ↗matharena ⚠ | 87.5% ↗matharena ⚠ | +6.7 pt | GPT-5.1 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 88.6% ↗epoch | 86.7% ↗epoch | +1.9 pt | GPT-5.1 |
| SimpleQA Verified | 48% ↗epoch | 21.6% ↗epoch | +26.4 pt | GPT-5.1 |
| SWE-bench Verified (Epoch AI run) | 68% ↗epoch | 64.7% ↗epoch | +3.3 pt | GPT-5.1 |
| Only GPT-5.1 reports · 1 | ||||
| LMArena Elo | 1422.6 ↗ | not reported | — | — |
| Only GPT-5 mini reports · 3 | ||||
| SWE-bench Verified | not reported | 71% ↗ | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 12.2% ↗epoch | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 46.7% ↗epoch | — | — |
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-5.1 minus GPT-5 mini 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-5.1 | GPT-5 mini | Edge |
|---|---|---|---|
| Context window | 400K tokens | 400K tokens | Tie |
| Max output | 128K tokens | 128K tokens | Tie |
| Input price / 1M | $1.25 ↗ | $0.25 ↗ | GPT-5 mini |
| Output price / 1M | $10 ↗ | $2 ↗ | GPT-5 mini |
| Cached input / 1M | $0.125 ↗ | $0.025 ↗ | GPT-5 mini |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $11.25 | $2.25 | GPT-5 mini |
| Modalities | text · vision | text · vision | Tie |
| Released | 2025-11-13 | 2025-08-07 | — |
| Cited benchmark scores | 6 | 9 | — |
Reliability
OpenAI status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-5.1 vs …
Models sharing the most benchmarksMore matchups
GPT-5 mini vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-5.1 and GPT-5 mini on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.