Data points: 89
Model compare
The readout for GPT-5.1 and GPT-5 Mini, before the detailed comparison sheet.
Weighted outcome: GPT-5 Mini. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5 Mini
GPT-5 Mini has the higher weighted result; Model A / B score 42.7 to 57.3.
Evidence depth
89 data points
Includes 12 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5 Mini
The charts below split 18 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 GPT-5 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.1 | GPT-5 Mini |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 42.7 pts | 57.3 pts |
| Benchmark category leads | 1 categories | 2 categories |
| Operational advantages | Average speed, First-token latency, Free providers, Provider coverage | Cheapest input price |
| Context window | 400K tokens | 400K tokens |
| Max output | 128K tokens | 128K tokens |
| Modalities | Input ImageTextFile Output Text | Input |
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 | GPT-5 Mini |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Nov 2025 | Aug 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2024-05-31 |
| OpenRouter ID | openai/gpt-5.1 | openai/gpt-5-mini |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.1 and GPT-5 Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Math) and operational dimensions (Average speed, First-token latency, Free providers, Provider coverage).
GPT-5 Mini
GPT-5 Mini is stronger in benchmark categories (Coding, Reasoning) and operational dimensions (Cheapest input price).
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
52.1
Avg. score
GPT-5 Mini
51.8
GPT-5.1
GPT-5 Mini leads by 0.4
GPT-5 Mini leads by 0.6
GPT-5.1
GPT-5.1 leads by 1.8
No data
No data
GPT-5.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.1
111.6 tok/s
Rank #60/136 · confidence 4
GPT-5 Mini
winner112.8 tok/s
Rank #58/136 · confidence 4
GPT-5.1
winner35.90 s
Rank #113/136 · confidence 4
GPT-5 Mini
84.93 s
Rank #131/136 · confidence 4
GPT-5.1
winner35.90 s
Rank #128/136 · confidence 4
GPT-5 Mini
84.93 s
Rank #133/136 · confidence 4
GPT-5.1
$1.25/M
Rank #108/162 · confidence 4
GPT-5 Mini
winner$0.250/M
Rank #36/162 · confidence 4
GPT-5.1
$3.44/M
Rank #118/162 · confidence 4
GPT-5 Mini
winner$0.688/M
Rank #53/162 · confidence 4
GPT-5.1
$10.00/M
Rank #121/162 · confidence 4
GPT-5 Mini
winner$2.00/M
Rank #60/162 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
GPT-5 Mini
83.7%
Rank #32/125 · confidence 4
GPT-5.1
winner87.3%
Rank #32/187 · confidence 4
GPT-5 Mini
82.8%
Rank #58/187 · confidence 4
GPT-5.1
winner26.5%
Rank #39/186 · confidence 4
GPT-5 Mini
19.7%
Rank #58/186 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
GPT-5 Mini
83.8%
Rank #12/115 · confidence 4
GPT-5.1
winner24.6
Rank #18/33 · confidence 1 · eval date 2025-11-13
GPT-5 Mini
14.2
Rank #27/33 · confidence 1 · eval date 2025-08-07
GPT-5.1
winner43.3%
Rank #41/184 · confidence 4
GPT-5 Mini
39.2%
Rank #80/184 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.1 | GPT-5 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 | GPT-5 Mini |
|---|---|---|
10 tests | GPT-5.1 speed / latency 137 tok/s / 3299ms input / output No data | GPT-5 Mini speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | GPT-5 Mini speed / latency 76 tok/s / 6393ms input / output No data |
5 tests | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data | GPT-5 Mini speed / latency N/A / N/A input / output No data |
5 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | GPT-5 Mini speed / latency 83 tok/s / 6571ms input / output No data |
5 tests | GPT-5.1 speed / latency N/A / N/A input / output No data | GPT-5 Mini speed / latency 94 tok/s / 6360ms input / output No data |
GPT-5.1 gpt-5.1-chat-latest speed / latency No data input / output $0/request | GPT-5 Mini gpt-5-mini speed / latency No data input / output $0/request |
Weighted outcome: GPT-5 Mini. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
