Data points: 104
Model compare
The readout for GPT-5.1 Codex Max 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 34.3 to 65.7.
Evidence depth
104 data points
Includes 20 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.2
The charts below split 28 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 Max and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.1 Codex Max | GPT-5.2 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 34.3 pts | 65.7 pts |
| Benchmark category leads | 3 categories | 4 categories |
| Operational advantages | No data | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage |
| Context window | 400K tokens | 400K tokens |
| Max output | 128K tokens | 128K tokens |
| Modalities | Input TextImage 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 Max | GPT-5.2 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Dec 2025 | Dec 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.1-codex-max | openai/gpt-5.2 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.1 Codex Max and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.1 Codex Max
GPT-5.1 Codex Max leads these benchmark categories: Agents, Reasoning, Multimodal.
GPT-5.2
GPT-5.2 is stronger in benchmark categories (Coding, Knowledge, Multilingual, 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-5.1 Codex Max
55.5
Avg. score
GPT-5.2
54.3
GPT-5.1 Codex Max leads by 1.9
GPT-5.2 leads by 5.5
GPT-5.1 Codex Max leads by 1.1
GPT-5.2 leads by 4.2
GPT-5.2
GPT-5.2 leads by 2.5
GPT-5.1 Codex Max leads by 22.0
GPT-5.2 leads by 2.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.1 Codex Max
71.0
Rank #29/127 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner74.0
Rank #25/127 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
83.0
Rank #5/70 · confidence 1 · eval date 2025-11-19
GPT-5.2
83.0
Rank #5/70 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
67.3
Rank #30/89 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner72.7
Rank #12/89 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
5.7
Rank #30/73 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner11.6
Rank #19/73 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
22.2
Rank #20/33 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner53.5
Rank #6/33 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
34.8
Rank #40/85 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner47.0
Rank #15/85 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
40.2
Rank #56/96 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner52.1
Rank #17/96 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
winner77.6
Rank #17/100 · confidence 1 · eval date 2025-11-19
GPT-5.2
75.4
Rank #23/100 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
73.6
Rank #26/92 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner88.2
Rank #6/92 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
39.2
Rank #23/90 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner43.8
Rank #16/90 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
86.0
Rank #40/96 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner90.3
Rank #18/96 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
23.4
Rank #45/96 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner35.4
Rank #21/96 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
34.7
Rank #46/99 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner42.2
Rank #21/99 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
74.4
Rank #48/90 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner79.7
Rank #40/90 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
84.0
Rank #8/62 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner95.2
Rank #5/62 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
winner86.5
Rank #6/81 · confidence 1 · eval date 2025-11-19
GPT-5.2
80.8
Rank #11/81 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
winner82.0
Rank #15/75 · confidence 1 · eval date 2025-11-19
GPT-5.2
78.8
Rank #22/75 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
70.0
Rank #39/86 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner75.4
Rank #21/86 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
winner74.6
Rank #24/95 · confidence 1 · eval date 2025-11-19
GPT-5.2
51.8
Rank #48/95 · confidence 3 · eval date 2025-12-11
GPT-5.1 Codex Max
83.0
Rank #50/84 · confidence 1 · eval date 2025-11-19
GPT-5.2
winner84.8
Rank #44/84 · confidence 3 · eval date 2025-12-11
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.1 Codex Max | 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 Max | GPT-5.2 |
|---|---|---|
18 tests | GPT-5.1 Codex Max speed / latency 72 tok/s / 7976ms input / output No data | GPT-5.2 speed / latency 52 tok/s / 2671ms input / output No data |
15 tests | GPT-5.1 Codex Max speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 56 tok/s / 1798ms input / output No data |
5 tests | GPT-5.1 Codex Max 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 Max speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 65 tok/s / 4770ms input / output No data |
5 tests | GPT-5.1 Codex Max speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 55 tok/s / 1434ms input / output No data |
GPT-5.1 Codex Max gpt-5.1-codex-max-2025-12-04 speed / latency No data input / output $0/request | GPT-5.2 gpt-5.2-chat-latest speed / latency No data input / output $0/request | |
GPT-5.1 Codex Max gpt-5.1-codex-max speed / latency No data input / output $0.0062/request | GPT-5.2 gpt-5.2-chat-latest speed / latency No data input / output $0.719/M | |
GPT-5.1 Codex Max gpt-5.1-codex-max speed / latency No data input / output $0.010/request | GPT-5.2 gpt-5.2-2025-12-11 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 |
|---|
