Data points: 121
Model compare
The readout for GLM-5 and GPT-5.1, before the detailed comparison sheet.
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.1
GPT-5.1 has the higher weighted result; Model A / B score 17.3 to 82.7.
Evidence depth
121 data points
Includes 28 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 38 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 GLM-5 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GLM-5 | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 17.3 pts | 82.7 pts |
| Benchmark category leads | 1 categories | 5 categories |
| Operational advantages | Provider coverage | Cheapest input price, Average speed, First-token latency, Free providers |
| Context window | 204.8K tokens | 400K tokens |
| Max output | 131.1K tokens | 128K tokens |
| Modalities | Input Text Output Text | Input Image |
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 | GLM-5 | GPT-5.1 |
|---|---|---|
| Developer | Z.ai | OpenAI |
| Released | Feb 2026 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Other | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | z-ai/glm-5 | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for GLM-5 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GLM-5
GLM-5 is stronger in benchmark categories (Coding) and operational dimensions (Provider coverage).
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Reasoning, Knowledge, Math, Instruction following) and operational dimensions (Cheapest input price, Average speed, First-token latency, Free providers).
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
GLM-5
47.9
Avg. score
GPT-5.1
52.1
GPT-5.1 leads by 5.4
GLM-5 leads by 2.9
GPT-5.1 leads by 3.3
GPT-5.1 leads by 10.9
GPT-5.1 leads by 2.9
GLM-5
No data
GPT-5.1 leads by 1.3
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GLM-5
winner64.0
Rank #24/83 · confidence 4 · eval date 2026-03-01
GPT-5.1
56.0
Rank #44/83 · confidence 1 · eval date 2025-11-13
GLM-5
winner0.75 s
Rank #37/136 · confidence 4
GPT-5.1
35.90 s
Rank #128/136 · confidence 4
GLM-5
56.8 tok/s
Rank #112/136 · confidence 4
GPT-5.1
winner111.6 tok/s
Rank #60/136 · confidence 4
GLM-5
55.46 s
Rank #126/136 · confidence 4
GPT-5.1
winner35.90 s
Rank #113/136 · confidence 4
GLM-5
winner$3.20/M
Rank #89/162 · confidence 4
GPT-5.1
$10.00/M
Rank #121/162 · confidence 4
GLM-5
winner$1.55/M
Rank #93/162 · confidence 4
GPT-5.1
$3.44/M
Rank #118/162 · confidence 4
GLM-5
winner$1.00/M
Rank #99/162 · confidence 4
GPT-5.1
$1.25/M
Rank #108/162 · confidence 4
GLM-5
63.3
Rank #52/89 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner75.0
Rank #3/89 · confidence 1 · eval date 2025-11-13
GLM-5
85.7%
Rank #23/125 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
GLM-5
82.0%
Rank #66/187 · confidence 4
GPT-5.1
winner87.3%
Rank #32/187 · confidence 4
GLM-5
2.0
Rank #46/73 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner4.9
Rank #34/73 · confidence 1 · eval date 2025-11-13
GLM-5
winner27.2%
Rank #37/186 · confidence 4
GPT-5.1
26.5%
Rank #39/186 · confidence 4
GLM-5
23.4
Rank #19/33 · confidence 1 · eval date 2026-03-01
GPT-5.1
winner24.6
Rank #18/33 · confidence 1 · eval date 2025-11-13
GLM-5
winner46.2%
Rank #31/184 · confidence 4
GPT-5.1
43.3%
Rank #41/184 · confidence 4
GLM-5
winner46.2
Rank #36/96 · confidence 4 · eval date 2026-03-01
GPT-5.1
43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
GLM-5
2.1
Rank #30/35 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner12.5
Rank #16/35 · confidence 1 · eval date 2025-11-13
GLM-5
16.4
Rank #31/47 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner31.0
Rank #19/47 · confidence 1 · eval date 2025-11-13
GLM-5
winner57.2
Rank #25/56 · confidence 4 · eval date 2026-03-01
GPT-5.1
49.9
Rank #30/56 · confidence 1 · eval date 2025-11-13
GLM-5
2.0
Rank #26/29 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner5.6
Rank #19/29 · confidence 1 · eval date 2025-11-13
GLM-5
26.9
Rank #48/90 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner37.6
Rank #31/90 · confidence 1 · eval date 2025-11-13
GLM-5
winner39.5
Rank #34/99 · confidence 4 · eval date 2026-03-01
GPT-5.1
36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
GLM-5
82.0
Rank #56/96 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
GLM-5
winner27.2
Rank #37/96 · confidence 4 · eval date 2026-03-01
GPT-5.1
26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
GLM-5
34.0
Rank #80/90 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner51.3
Rank #66/90 · confidence 1 · eval date 2025-11-13
GLM-5
winner1280.0
Rank #22/65 · confidence 4 · eval date 2026-03-01
GPT-5.1
1220.0
Rank #37/65 · confidence 1 · eval date 2025-11-13
GLM-5
72.3
Rank #33/86 · confidence 4 · eval date 2026-03-01
GPT-5.1
winner72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
GLM-5
winner98.2
Rank #6/84 · confidence 4 · eval date 2026-03-01
GPT-5.1
81.9
Rank #52/84 · confidence 1 · eval date 2025-11-13
GLM-5
winner51.0
Rank #21/50 · confidence 4 · eval date 2026-03-01
GPT-5.1
41.2
Rank #35/50 · confidence 1 · eval date 2025-11-13
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GLM-5 | GPT-5.1 |
|---|---|---|
| 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 | GLM-5 | GPT-5.1 |
|---|---|---|
10 tests | GLM-5 speed / latency 41 tok/s / 18111ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | GLM-5 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
5 tests | GLM-5 speed / latency 23 tok/s / 39702ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | GLM-5 speed / latency 36 tok/s / 21941ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | GLM-5 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
GLM-5 glm-5 speed / latency No data input / output $0/M/$0/M | GPT-5.1 gpt-5.1 speed / latency No data input / output $0.086/M | |
GLM-5 glm-5 speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1 speed / latency No data input / output $0/request | |
GLM-5 glm-5 speed / latency No data input / output $0.010/request | GPT-5.1 gpt-5.1-chat-2025-11-13 speed / latency No data input / output $0.050/request | |
GLM-5 GLM-5 speed / latency No data input / output $0.040/request | GPT-5.1 gpt-5.1 speed / latency No data input / output $2.50/M | |
GLM-5 GLM-5 speed / latency No data input / output $0.040/request | GPT-5.1 gpt-5.1-2025-11-13 speed / latency No data input / output $2.50/M |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
