Data points: 82
Model compare
The readout for GPT-5.1 Codex Mini and GPT-5.2 Codex, before the detailed comparison sheet.
Weighted outcome: Tie. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Tie
Tie has the higher weighted result; Model A / B score 50 to 50.
Evidence depth
82 data points
Includes 9 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Tie
The charts below split 17 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 Codex: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.1 Codex Mini | GPT-5.2 Codex |
|---|---|---|
| Overall leader | Tie | Tie |
| Weighted overall score | 50.0 pts | 50.0 pts |
| Benchmark category leads | 1 categories | 1 categories |
| Operational advantages | Cheapest input price, Average speed | First-token latency, Provider coverage |
| Context window | 400K tokens | 400K tokens |
| Max output | 100K tokens | 128K tokens |
| Modalities | Input ImageText Output Text | Input 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 Codex Mini | GPT-5.2 Codex |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Nov 2025 | Jan 2026 |
| 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-codex |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.1 Codex Mini and GPT-5.2 Codex: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.1 Codex Mini
GPT-5.1 Codex Mini is stronger in benchmark categories (Coding) and operational dimensions (Cheapest input price, Average speed).
GPT-5.2 Codex
GPT-5.2 Codex is stronger in benchmark categories (Reasoning) and operational dimensions (First-token latency, 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 Codex
57.4
GPT-5.2 Codex
GPT-5.1 Codex Mini leads by 0.5
GPT-5.2 Codex leads by 6.3
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 Codex
132.4 tok/s
Rank #39/139 · confidence 4
GPT-5.1 Codex Mini
3.84 s
Rank #59/139 · confidence 4
GPT-5.2 Codex
winner1.07 s
Rank #38/139 · confidence 4
GPT-5.1 Codex Mini
3.84 s
Rank #106/139 · confidence 4
GPT-5.2 Codex
winner1.07 s
Rank #63/139 · confidence 4
GPT-5.1 Codex Mini
winner$0.250/M
Rank #37/163 · confidence 4
GPT-5.2 Codex
$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 Codex
$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 Codex
$14.00/M
Rank #135/163 · confidence 4
GPT-5.1 Codex Mini
81.3%
Rank #69/187 · confidence 4
GPT-5.2 Codex
winner89.9%
Rank #20/187 · confidence 4
GPT-5.1 Codex Mini
16.9%
Rank #65/186 · confidence 4
GPT-5.2 Codex
winner33.5%
Rank #23/186 · confidence 4
GPT-5.1 Codex Mini
42.6%
Rank #45/184 · confidence 4
GPT-5.2 Codex
winner54.6%
Rank #5/184 · 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 Codex |
|---|---|---|
| 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 Codex |
|---|---|---|
26 tests | GPT-5.1 Codex Mini speed / latency 134 tok/s / 1852ms input / output No data | GPT-5.2 Codex speed / latency 56 tok/s / 2307ms input / output No data |
5 tests | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data | GPT-5.2 Codex speed / latency 30 tok/s / 4723ms input / output No data |
5 tests | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data | GPT-5.2 Codex speed / latency 57 tok/s / 2370ms input / output No data |
5 tests | GPT-5.1 Codex Mini speed / latency 199 tok/s / 1905ms input / output No data | GPT-5.2 Codex speed / latency N/A / N/A input / output No data |
5 tests | GPT-5.1 Codex Mini speed / latency 82 tok/s / 13938ms input / output No data | GPT-5.2 Codex speed / latency N/A / N/A 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 Codex gpt-5.2-codex 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 Codex gpt-5.2-codex-xhigh speed / latency No data input / output $0.360/M | |
GPT-5.1 Codex Mini gpt-5.1-codex-mini speed / latency No data input / output $0.0068/request | GPT-5.2 Codex gpt-5.2-codex-xhigh speed / latency No data input / output $0.240/M |
Weighted outcome: Tie. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
GPT-5.2 Codex
GPT-5.1 Codex Mini
GPT-5.2 Codex
GPT-5.2 Codex
GPT-5.2 Codex
