Data points: 87
Model compare
The readout for GPT-5 and GPT-5.1 Codex Mini, before the detailed comparison sheet.
Weighted outcome: GPT-5.1 Codex Mini. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.1 Codex Mini
GPT-5.1 Codex Mini has the higher weighted result; Model A / B score 38.7 to 61.3.
Evidence depth
87 data points
Includes 11 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.1 Codex Mini
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 and GPT-5.1 Codex Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5 | GPT-5.1 Codex Mini |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 38.7 pts | 61.3 pts |
| Benchmark category leads | 1 categories | 2 categories |
| Operational advantages | Cheapest input price, Free providers, Provider coverage | Average speed, First-token latency |
| Context window | 400K tokens | 400K tokens |
| Max output | 128K tokens | 100K tokens |
| Modalities | Input TextImageFile 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 | GPT-5.1 Codex Mini |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Aug 2025 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | 2024-09-30 | No data |
| OpenRouter ID | openai/gpt-5 | openai/gpt-5.1-codex-mini |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5 and GPT-5.1 Codex Mini: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5
GPT-5 is stronger in benchmark categories (Math) and operational dimensions (Cheapest input price, Free providers, Provider coverage).
GPT-5.1 Codex Mini
GPT-5.1 Codex Mini is stronger in benchmark categories (Coding, Reasoning) and operational dimensions (Average speed, First-token latency).
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
52
Avg. score
GPT-5.1 Codex Mini
54.7
GPT-5
GPT-5.1 Codex Mini leads by 7.9
GPT-5.1 Codex Mini leads by 1.6
GPT-5
GPT-5 leads by 8.1
No data
No data
GPT-5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5
73.8 tok/s
Rank #84/139 · confidence 4
GPT-5.1 Codex Mini
winner209.2 tok/s
Rank #15/139 · confidence 4
GPT-5
winner0.81 s
Rank #28/139 · confidence 4
GPT-5.1 Codex Mini
3.84 s
Rank #59/139 · confidence 4
GPT-5
winner0.81 s
Rank #40/139 · confidence 4
GPT-5.1 Codex Mini
3.84 s
Rank #106/139 · confidence 4
GPT-5
$1.25/M
Rank #109/163 · confidence 4
GPT-5.1 Codex Mini
winner$0.250/M
Rank #37/163 · confidence 4
GPT-5
$3.44/M
Rank #119/163 · confidence 4
GPT-5.1 Codex Mini
winner$0.688/M
Rank #54/163 · confidence 4
GPT-5
$10.00/M
Rank #122/163 · confidence 4
GPT-5.1 Codex Mini
winner$2.00/M
Rank #61/163 · confidence 4
GPT-5
80.6%
Rank #57/125 · confidence 4
GPT-5.1 Codex Mini
winner82.0%
Rank #47/125 · confidence 4
GPT-5
5.4%
Rank #131/186 · confidence 4
GPT-5.1 Codex Mini
winner16.9%
Rank #65/186 · confidence 4
GPT-5
67.3%
Rank #120/187 · confidence 4
GPT-5.1 Codex Mini
winner81.3%
Rank #69/187 · confidence 4
GPT-5
55.8%
Rank #49/115 · confidence 4
GPT-5.1 Codex Mini
winner83.6%
Rank #13/115 · confidence 4
GPT-5
38.8%
Rank #82/184 · confidence 4
GPT-5.1 Codex Mini
winner42.6%
Rank #45/184 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | GPT-5.1 Codex 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 | GPT-5.1 Codex Mini |
|---|---|---|
5 tests | GPT-5 speed / latency 45 tok/s / 3704ms input / output No data | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data |
5 tests | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data |
5 tests | GPT-5 speed / latency 102 tok/s / 948ms input / output No data | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data |
5 tests | GPT-5 speed / latency N/A / N/A input / output No data | GPT-5.1 Codex Mini speed / latency 199 tok/s / 1905ms input / output No data |
5 tests | GPT-5 speed / latency 131 tok/s / 743ms input / output No data | GPT-5.1 Codex Mini speed / latency N/A / N/A input / output No data |
GPT-5 gpt-5 speed / latency No data input / output $0/request | GPT-5.1 Codex Mini gpt-5.1-codex-mini-2025-11-13 speed / latency No data input / output $0/request |
Weighted outcome: GPT-5.1 Codex Mini. 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 inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
