Data points: 86
Model compare
The readout for GPT-5.1 Codex Mini and GPT-5.2, before the detailed comparison sheet.
Weighted outcome: GPT-5.2. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.2
GPT-5.2 has the higher weighted result; Model A / B score 17.3 to 82.7.
Evidence depth
86 data points
Includes 11 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.2
The charts below split 19 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 Codex Mini and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.1 Codex Mini | GPT-5.2 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 17.3 pts | 82.7 pts |
| Benchmark category leads | 0 categories | 2 categories |
| Operational advantages | Average speed | Cheapest input price, First-token latency, Free providers, Provider coverage |
| Context window | 400K tokens | 400K tokens |
| Max output | 100K tokens | 128K tokens |
| Modalities | Input ImageText Output Text | Input File |
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 Codex Mini | GPT-5.2 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Nov 2025 | Dec 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.1-codex-mini | openai/gpt-5.2 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.1 Codex Mini and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.1 Codex Mini
GPT-5.1 Codex Mini has these operational advantages: Average speed.
GPT-5.2
GPT-5.2 is stronger in benchmark categories (Reasoning, Math) and operational dimensions (Cheapest input price, 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-5.1 Codex Mini
54.8
Avg. score
GPT-5.2
54.3
GPT-5.2
Tied
GPT-5.2 leads by 1.3
GPT-5.2
GPT-5.2 leads by 2.5
GPT-5.2
GPT-5.2
GPT-5.2
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.1 Codex Mini
winner209.2 tok/s
Rank #15/139 · confidence 4
GPT-5.2
62.2 tok/s
Rank #92/139 · confidence 4
GPT-5.1 Codex Mini
3.84 s
Rank #59/139 · confidence 4
GPT-5.2
winner0.62 s
Rank #17/139 · confidence 4
GPT-5.1 Codex Mini
3.84 s
Rank #106/139 · confidence 4
GPT-5.2
winner0.62 s
Rank #25/139 · confidence 4
GPT-5.1 Codex Mini
winner$0.250/M
Rank #37/163 · confidence 4
GPT-5.2
$1.75/M
Rank #122/163 · confidence 4
GPT-5.1 Codex Mini
winner$0.688/M
Rank #54/163 · confidence 4
GPT-5.2
$4.81/M
Rank #134/163 · confidence 4
GPT-5.1 Codex Mini
winner$2.00/M
Rank #61/163 · confidence 4
GPT-5.2
$14.00/M
Rank #135/163 · confidence 4
GPT-5.1 Codex Mini
winner82.0%
Rank #47/125 · confidence 4
GPT-5.2
81.4%
Rank #54/125 · confidence 4
GPT-5.1 Codex Mini
winner16.9%
Rank #65/186 · confidence 4
GPT-5.2
7.3%
Rank #108/186 · confidence 4
GPT-5.1 Codex Mini
winner81.3%
Rank #69/187 · confidence 4
GPT-5.2
71.2%
Rank #110/187 · confidence 4
GPT-5.1 Codex Mini
winner83.6%
Rank #13/115 · confidence 4
GPT-5.2
66.9%
Rank #36/115 · confidence 4
GPT-5.1 Codex Mini
winner42.6%
Rank #45/184 · confidence 4
GPT-5.2
40.4%
Rank #63/184 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.1 Codex Mini | GPT-5.2 |
|---|---|---|
| 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 Codex Mini | GPT-5.2 |
|---|---|---|
15 tests | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 56 tok/s / 1798ms input / output No data |
15 tests | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 52 tok/s / 2671ms input / output No data |
10 tests | GPT-5.1 Codex Mini speed / latency 199 tok/s / 1905ms input / output No data | GPT-5.2 speed / latency 55 tok/s / 1434ms input / output No data |
5 tests | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 64 tok/s / 3553ms input / output No data |
5 tests | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 65 tok/s / 4770ms input / output No data |
GPT-5.1 Codex Mini gpt-5.1-codex-mini-2025-11-13 speed / latency No data input / output $0/request | GPT-5.2 gpt-5.2 speed / latency No data input / output $0/request | |
GPT-5.1 Codex Mini gpt-5.1-codex-mini speed / latency No data input / output $0.0041/request | GPT-5.2 gpt-5.2-chat-latest speed / latency No data input / output $0.719/M | |
GPT-5.1 Codex Mini gpt-5.1-codex-mini speed / latency No data input / output $0.0068/request | GPT-5.2 gpt-5.2-chat-latest speed / latency No data input / output $1.80/M |
Weighted outcome: GPT-5.2. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
