Data points: 99
Model compare
The readout for GPT-4o Mini and GPT-5.1, before the detailed comparison sheet.
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.1
GPT-5.1 has the higher weighted result; Model A / B score 13.3 to 86.7.
Evidence depth
99 data points
Includes 17 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 23 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for GPT-4o Mini and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-4o Mini | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 13.3 pts | 86.7 pts |
| Benchmark category leads | 1 categories | 5 categories |
| Operational advantages | No data | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage |
| Context window | 128K tokens | 400K tokens |
| Max output | 16.4K tokens | 128K tokens |
| Modalities | Input TextImageFile Output Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | GPT-4o Mini | GPT-5.1 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Jul 2024 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2023-10-31 | No data |
| OpenRouter ID | openai/gpt-4o-mini | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-4o Mini and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-4o Mini
GPT-4o Mini leads these benchmark categories: Knowledge.
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Coding, Reasoning, Math, Instruction following) and operational dimensions (Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage).
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
GPT-4o Mini
41.8
Avg. score
GPT-5.1
52
GPT-5.1 leads by 15.9
GPT-5.1 leads by 11.9
GPT-5.1 leads by 12.2
GPT-4o Mini leads by 0.3
GPT-5.1 leads by 7.9
No data
No data
GPT-5.1 leads by 13.5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-4o Mini
winner$0.262/M
Rank #21/162 · confidence 4
GPT-5.1
$3.44/M
Rank #117/162 · confidence 4
GPT-4o Mini
winner$0.150/M
Rank #21/162 · confidence 4
GPT-5.1
$1.25/M
Rank #107/162 · confidence 4
GPT-4o Mini
winner$0.600/M
Rank #23/162 · confidence 4
GPT-5.1
$10.00/M
Rank #120/162 · confidence 4
GPT-4o Mini
64.8%
Rank #112/125 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
GPT-4o Mini
42.6%
Rank #173/188 · confidence 4
GPT-5.1
winner87.3%
Rank #33/188 · confidence 4
GPT-4o Mini
4.0%
Rank #162/187 · confidence 4
GPT-5.1
winner26.5%
Rank #40/187 · confidence 4
GPT-4o Mini
23.4%
Rank #101/115 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
GPT-4o Mini
11.4
Rank #57/59 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner49.4
Rank #32/59 · confidence 1 · eval date 2025-11-13
GPT-4o Mini
22.9%
Rank #166/185 · confidence 4
GPT-5.1
winner43.3%
Rank #42/185 · confidence 4
GPT-4o Mini
22.9
Rank #94/96 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
GPT-4o Mini
42.6
Rank #95/96 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
GPT-4o Mini
4.0
Rank #89/96 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
GPT-4o Mini
6.9
Rank #97/99 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
GPT-4o Mini
41.5
Rank #55/57 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner75.5
Rank #23/57 · confidence 1 · eval date 2025-11-13
GPT-4o Mini
31.0
Rank #84/86 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
GPT-4o Mini
241.0
Rank #51/55 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner988.0
Rank #35/55 · confidence 1 · eval date 2025-11-13
GPT-4o Mini
1.0
Rank #55/55 · confidence 1 · eval date 2024-07-18
GPT-5.1
winner21.0
Rank #36/55 · confidence 1 · eval date 2025-11-13
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-4o Mini | GPT-5.1 |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-4o Mini | GPT-5.1 |
|---|---|---|
15 tests | GPT-4o Mini speed / latency 130 tok/s / 1129ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
10 tests | GPT-4o Mini speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 137 tok/s / 3299ms input / output No data |
10 tests | GPT-4o Mini speed / latency 84 tok/s / 5980ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | GPT-4o Mini speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
2 tests | GPT-4o Mini speed / latency 83 tok/s / 1341ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
GPT-4o Mini gpt-4o-mini speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1-all speed / latency No data input / output $0/request |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeWeb search | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
