Data points: 115
Model compare
The readout for GPT-5.1 and O3 Mini, 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 76 to 24.
Evidence depth
115 data points
Includes 25 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 31 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-5.1 and O3 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.1 | O3 Mini |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 76.0 pts | 24.0 pts |
| Benchmark category leads | 6 categories | 2 categories |
| Operational advantages | Cheapest input price, Average speed, First-token latency, Provider coverage | Free providers |
| Context window | 400K tokens | 200K tokens |
| Max output | 128K tokens | 100K tokens |
| Modalities | Input ImageTextFile 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-5.1 | O3 Mini |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Nov 2025 | Feb 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2023-10-31 |
| OpenRouter ID | openai/gpt-5.1 | openai/o3-mini |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.1 and O3 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Multilingual) and operational dimensions (Cheapest input price, Average speed, First-token latency, Provider coverage).
O3 Mini
O3 Mini is stronger in benchmark categories (Math, Instruction following) and operational dimensions (Free providers).
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-5.1
55.5
Avg. score
O3 Mini
49.3
GPT-5.1 leads by 8.2
GPT-5.1 leads by 14.1
GPT-5.1 leads by 2.7
GPT-5.1 leads by 10.4
O3 Mini leads by 4.6
GPT-5.1 leads by 8.5
GPT-5.1 leads by 12.1
O3 Mini leads by 1.5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.1
winner72.0
Rank #27/127 · confidence 1 · eval date 2025-11-13
O3 Mini
52.0
Rank #68/127 · confidence 1 · eval date 2025-01-31
GPT-5.1
109.7 tok/s
Rank #55/139 · confidence 4
O3 Mini
winner214.7 tok/s
Rank #15/139 · confidence 4
GPT-5.1
30.09 s
Rank #103/139 · confidence 4
O3 Mini
winner7.10 s
Rank #66/139 · confidence 4
GPT-5.1
30.09 s
Rank #127/139 · confidence 4
O3 Mini
winner7.10 s
Rank #111/139 · confidence 4
GPT-5.1
$10.00/M
Rank #122/163 · confidence 4
O3 Mini
winner$4.40/M
Rank #99/163 · confidence 4
GPT-5.1
$3.44/M
Rank #119/163 · confidence 4
O3 Mini
winner$1.93/M
Rank #100/163 · confidence 4
GPT-5.1
$1.25/M
Rank #109/163 · confidence 4
O3 Mini
winner$1.10/M
Rank #104/163 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
O3 Mini
79.1%
Rank #69/125 · confidence 4
GPT-5.1
winner65.4
Rank #23/70 · confidence 1 · eval date 2025-11-13
O3 Mini
61.4
Rank #27/70 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner87.3%
Rank #32/187 · confidence 4
O3 Mini
74.8%
Rank #96/187 · confidence 4
GPT-5.1
winner26.5%
Rank #39/186 · confidence 4
O3 Mini
8.7%
Rank #97/186 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
O3 Mini
71.7%
Rank #27/115 · confidence 4
GPT-5.1
winner45.5
Rank #19/85 · confidence 1 · eval date 2025-11-13
O3 Mini
6.8
Rank #77/85 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner43.3%
Rank #41/184 · confidence 4
O3 Mini
39.9%
Rank #69/184 · confidence 4
GPT-5.1
winner43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
O3 Mini
39.9
Rank #59/96 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner64.9
Rank #52/100 · confidence 1 · eval date 2025-11-13
O3 Mini
49.4
Rank #69/100 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner76.9
Rank #22/92 · confidence 1 · eval date 2025-11-13
O3 Mini
55.2
Rank #56/92 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
O3 Mini
74.8
Rank #71/96 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
O3 Mini
8.7
Rank #71/96 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
O3 Mini
19.0
Rank #77/99 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner84.0
Rank #8/62 · confidence 1 · eval date 2025-11-13
O3 Mini
44.8
Rank #40/62 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner91.9
Rank #1/81 · confidence 1 · eval date 2025-11-13
O3 Mini
65.0
Rank #36/81 · confidence 1 · eval date 2025-01-31
GPT-5.1
72.5
Rank #35/75 · confidence 1 · eval date 2025-11-13
O3 Mini
winner77.2
Rank #24/75 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner70.5
Rank #29/95 · confidence 1 · eval date 2025-11-13
O3 Mini
59.3
Rank #41/95 · confidence 1 · eval date 2025-01-31
GPT-5.1
winner81.9
Rank #54/84 · confidence 1 · eval date 2025-11-13
O3 Mini
28.7
Rank #74/84 · confidence 1 · eval date 2025-01-31
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.1 | O3 Mini |
|---|---|---|
| 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-5.1 | O3 Mini |
|---|---|---|
10 tests | GPT-5.1 speed / latency 137 tok/s / 3299ms input / output No data | O3 Mini speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data | O3 Mini speed / latency 117 tok/s / 4809ms input / output No data |
6 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | O3 Mini speed / latency 44 tok/s / 17418ms input / output No data |
0 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | O3 Mini speed / latency N/A / N/A input / output No data |
0 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | O3 Mini speed / latency N/A / N/A input / output No data |
GPT-5.1 gpt-5.1-chat-latest speed / latency No data input / output $0/request | O3 Mini o3-mini-high speed / latency No data input / output $1.47/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 modeReasoning | Text inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
