Data points: 109
Model compare
The readout for GPT-5 and Grok 4.5, before the detailed comparison sheet.
Weighted outcome: Grok 4.5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Grok 4.5
Grok 4.5 has the higher weighted result; Model A / B score 16 to 84.
Evidence depth
109 data points
Includes 20 benchmark rows, 1 audit samples, and 7 provider examples.
Selection signal
Start with Grok 4.5
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 and Grok 4.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5 | Grok 4.5 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 16.0 pts | 84.0 pts |
| Benchmark category leads | 0 categories | 4 categories |
| Operational advantages | Cheapest input price, Average speed, Free providers, Provider coverage | First-token latency |
| Context window | 400K tokens | 500K tokens |
| Max output | 128K tokens | No data |
| 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 | Grok 4.5 |
|---|---|---|
| Developer | OpenAI | xAI |
| Released | Aug 2025 | Jul 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | Grok |
| Knowledge cutoff | 2024-09-30 | No data |
| OpenRouter ID | openai/gpt-5 | x-ai/grok-4.5 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5 and Grok 4.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5
GPT-5 has these operational advantages: Cheapest input price, Average speed, Free providers, Provider coverage.
Grok 4.5
Grok 4.5 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge) and operational dimensions (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
51.9
Avg. score
Grok 4.5
56.5
Grok 4.5 leads by 16.8
Grok 4.5 leads by 9.9
Grok 4.5 leads by 2.6
Grok 4.5 leads by 8.0
GPT-5
No data
Grok 4.5
GPT-5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5
winner$1.25/M
Rank #110/169 · confidence 4
Grok 4.5
$2.00/M
Rank #129/169 · confidence 4
GPT-5
$10.00/M
Rank #126/169 · confidence 4
Grok 4.5
winner$6.00/M
Rank #110/169 · confidence 4
GPT-5
$3.44/M
Rank #123/169 · confidence 4
Grok 4.5
winner$3.00/M
Rank #117/169 · confidence 4
GPT-5
winner75.6
Rank #2/94 · confidence 1 · eval date 2025-08-07
Grok 4.5
67.7
Rank #31/94 · confidence 2 · eval date 2026-07-08
GPT-5
67.3%
Rank #127/194 · confidence 4
Grok 4.5
winner93.1%
Rank #6/194 · confidence 4
GPT-5
5.4%
Rank #138/193 · confidence 4
Grok 4.5
winner40.3%
Rank #13/193 · confidence 4
GPT-5
5.7
Rank #33/77 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner15.4
Rank #16/77 · confidence 2 · eval date 2026-07-08
GPT-5
37.8
Rank #46/64 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner72.5
Rank #9/64 · confidence 2 · eval date 2026-07-08
GPT-5
38.8%
Rank #88/191 · confidence 4
Grok 4.5
winner54.1%
Rank #10/191 · confidence 4
GPT-5
42.9
Rank #50/101 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner54.1
Rank #12/101 · confidence 2 · eval date 2026-07-08
GPT-5
85.4
Rank #49/101 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner93.1
Rank #6/101 · confidence 2 · eval date 2026-07-08
GPT-5
40.7
Rank #22/95 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner52.1
Rank #7/95 · confidence 2 · eval date 2026-07-08
GPT-5
34.7
Rank #53/104 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner53.8
Rank #8/104 · confidence 2 · eval date 2026-07-08
GPT-5
26.5
Rank #43/101 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner40.3
Rank #12/101 · confidence 2 · eval date 2026-07-08
GPT-5
winner82.1
Rank #31/95 · confidence 1 · eval date 2025-08-07
Grok 4.5
53.5
Rank #64/95 · confidence 2 · eval date 2026-07-08
GPT-5
1209.0
Rank #43/69 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner1321.0
Rank #5/69 · confidence 2 · eval date 2026-07-08
GPT-5
74.2
Rank #35/61 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner80.4
Rank #9/61 · confidence 2 · eval date 2026-07-08
GPT-5
25.7
Rank #33/60 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner45.7
Rank #8/60 · confidence 2 · eval date 2026-07-08
GPT-5
28.9
Rank #36/55 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner51.4
Rank #9/55 · confidence 2 · eval date 2026-07-08
GPT-5
1079.0
Rank #36/60 · confidence 1 · eval date 2025-08-07
Grok 4.5
winner1528.0
Rank #9/60 · confidence 2 · eval date 2026-07-08
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5 | Grok 4.5 |
|---|---|---|
Winner: Grok 4.5 | GPT-5 gpt-5 No audit yet | Grok 4.5 grok-4.5 Audit score 87 788486100 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5 | Grok 4.5 |
|---|---|---|
5 tests | GPT-5 speed / latency 102 tok/s / 948ms input / output No data | Grok 4.5 speed / latency N/A / N/A input / output No data |
5 tests | GPT-5 speed / latency 58 tok/s / 17419ms input / output No data | Grok 4.5 speed / latency N/A / N/A input / output No data |
0 tests | GPT-5 speed / latency N/A / N/A input / output No data | Grok 4.5 speed / latency N/A / N/A input / output No data |
0 tests | GPT-5 speed / latency N/A / N/A input / output No data | Grok 4.5 speed / latency N/A / N/A input / output No data |
0 tests | GPT-5 speed / latency N/A / N/A input / output No data | Grok 4.5 speed / latency N/A / N/A input / output No data |
GPT-5 gpt-5 speed / latency No data input / output $0/M/$0/M | Grok 4.5 grok-4.5 speed / latency No data input / output $0.137/M | |
GPT-5 gpt-5-all speed / latency No data input / output $0/request | Grok 4.5 grok-4.5 speed / latency No data input / output $0/request |
Weighted outcome: Grok 4.5. 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 inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
