Compare / head-to-head
GPT-4o minivsGPT-5.1
GPT-5.1 leads 3 of 3 shared benchmarks. GPT-4o mini is 15x cheaper per token. GPT-5.1 has the larger context window (400K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 3
GPT-5.1 leads
Cheaper per token
GPT-4o mini
15x cheaper, input + output
Larger context
GPT-5.1
400K tokens
Provider uptime (30d)
94.2446%
OpenAI
GPT-4o mini
OpenAI · released 2024-07-18
textvision
Quality
Benchmark matrix
3 shared · 3 only GPT-4o mini · 3 only GPT-5.1| Benchmark | GPT-4o mini | GPT-5.1 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 3 | ||||
| GPQA Diamond | 40.2% ↗ | 87.6% ↗epoch | -47.4 pt | GPT-5.1 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 6.9% ↗epoch | 88.6% ↗epoch | -81.7 pt | GPT-5.1 |
| SimpleQA Verified | 8.3% ↗epoch | 48% ↗epoch | -39.7 pt | GPT-5.1 |
| Only GPT-4o mini reports · 3 | ||||
| MMLU | 82% ↗ | not reported | — | — |
| AIME 2024 | 8.6% ↗ | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 0.7% ↗epoch | not reported | — | — |
| Only GPT-5.1 reports · 3 | ||||
| AIME 2025 | not reported | 94.2% ↗matharena ⚠ | — | — |
| LMArena Elo | not reported | 1422.6 ↗ | — | — |
| SWE-bench Verified (Epoch AI run) | not reported | 68% ↗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-4o mini minus GPT-5.1 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-4o mini | GPT-5.1 | Edge |
|---|---|---|---|
| Context window | 128K tokens | 400K tokens | GPT-5.1 |
| Max output | 16K tokens | 128K tokens | GPT-5.1 |
| Input price / 1M | $0.15 ↗ | $1.25 ↗ | GPT-4o mini |
| Output price / 1M | $0.6 ↗ | $10 ↗ | GPT-4o mini |
| Cached input / 1M | $0.075 ↗ | $0.125 ↗ | GPT-4o mini |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.75 | $11.25 | GPT-4o mini |
| Modalities | text · vision | text · vision | Tie |
| Released | 2024-07-18 | 2025-11-13 | — |
| Cited benchmark scores | 7 | 6 | — |
Reliability
OpenAI status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-4o mini vs …
Models sharing the most benchmarksMore matchups
GPT-5.1 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-4o mini and GPT-5.1 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.