Data points: 122
Model compare
The readout for GPT-5.4 and Grok 4.20, before the detailed comparison sheet.
Weighted outcome: GPT-5.4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.4
GPT-5.4 has the higher weighted result; Model A / B score 96 to 4.
Evidence depth
122 data points
Includes 29 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 36 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-5.4 and Grok 4.20: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.4 | Grok 4.20 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 96.0 pts | 4.0 pts |
| Benchmark category leads | 5 categories | 0 categories |
| Operational advantages | Cheapest input price, First-token latency, Free providers, Provider coverage | Average speed |
| Context window | 1.1M tokens | 2M 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-5.4 | Grok 4.20 |
|---|---|---|
| Developer | OpenAI | xAI |
| Released | Mar 2026 | Mar 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | Grok |
| Knowledge cutoff | No data | 2025-09-01 |
| OpenRouter ID | openai/gpt-5.4 | x-ai/grok-4.20 |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.4 and Grok 4.20: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.4
GPT-5.4 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Multimodal) and operational dimensions (Cheapest input price, First-token latency, Free providers, Provider coverage).
Grok 4.20
Grok 4.20 has these operational advantages: Average speed.
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-5.4
57.4
Avg. score
Grok 4.20
45.1
GPT-5.4 leads by 13.0
GPT-5.4 leads by 15.5
GPT-5.4 leads by 4.6
GPT-5.4 leads by 15.8
GPT-5.4
No data
GPT-5.4 leads by 15.4
GPT-5.4
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.4
winner67.0
Rank #19/84 · confidence 3 · eval date 2026-03-05
Grok 4.20
46.0
Rank #65/84 · confidence 2 · eval date 2026-03-10
GPT-5.4
$15.00/M
Rank #136/162 · confidence 4
Grok 4.20
winner$6.00/M
Rank #105/162 · confidence 4
GPT-5.4
$5.63/M
Rank #135/162 · confidence 4
Grok 4.20
winner$3.00/M
Rank #112/162 · confidence 4
GPT-5.4
$2.50/M
Rank #131/162 · confidence 4
Grok 4.20
winner$2.00/M
Rank #123/162 · confidence 4
GPT-5.4
winner74.0
Rank #7/15 · confidence 3 · eval date 2026-03-05
Grok 4.20
53.3
Rank #11/15 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner0.2
Rank #7/10 · confidence 3 · eval date 2026-03-05
Grok 4.20
0.1
Rank #10/10 · confidence 2 · eval date 2026-03-10
GPT-5.4
74.8%
Rank #96/188 · confidence 4
Grok 4.20
winner91.1%
Rank #14/188 · confidence 4
GPT-5.4
winner78.9
Rank #16/25 · confidence 3 · eval date 2026-03-05
Grok 4.20
61.7
Rank #21/25 · confidence 2 · eval date 2026-03-10
GPT-5.4
10.6%
Rank #91/187 · confidence 4
Grok 4.20
winner32.2%
Rank #29/187 · confidence 4
GPT-5.4
winner87.5
Rank #1/4 · confidence 3 · eval date 2026-03-05
Grok 4.20
74.2
Rank #3/4 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner67.4
Rank #3/33 · confidence 3 · eval date 2026-03-05
Grok 4.20
4.1
Rank #30/33 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner57.7
Rank #15/37 · confidence 3 · eval date 2026-03-05
Grok 4.20
51.8
Rank #32/37 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner47.1%
Rank #24/185 · confidence 4
Grok 4.20
45.6%
Rank #34/185 · confidence 4
GPT-5.4
42.4
Rank #53/65 · confidence 3 · eval date 2026-03-05
Grok 4.20
winner44.1
Rank #49/65 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner40.1
Rank #1/7 · confidence 3 · eval date 2026-03-05
Grok 4.20
20.3
Rank #6/7 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner59.6
Rank #2/4 · confidence 3 · eval date 2026-03-05
Grok 4.20
50.2
Rank #4/4 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner92.8
Rank #8/24 · confidence 3 · eval date 2026-03-05
Grok 4.20
88.5
Rank #17/24 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner39.8
Rank #11/15 · confidence 3 · eval date 2026-03-05
Grok 4.20
31.6
Rank #13/15 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner77.1
Rank #2/5 · confidence 3 · eval date 2026-03-05
Grok 4.20
65.8
Rank #4/5 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner65.4
Rank #3/6 · confidence 3 · eval date 2026-03-05
Grok 4.20
54.1
Rank #5/6 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner61.1
Rank #4/7 · confidence 3 · eval date 2026-03-05
Grok 4.20
57.4
Rank #6/7 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner81.2
Rank #6/27 · confidence 3 · eval date 2026-03-05
Grok 4.20
75.2
Rank #24/27 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner82.8
Rank #7/22 · confidence 3 · eval date 2026-03-05
Grok 4.20
60.9
Rank #21/22 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner68.5
Rank #14/35 · confidence 3 · eval date 2026-03-05
Grok 4.20
35.9
Rank #32/35 · confidence 2 · eval date 2026-03-10
GPT-5.4
1245.0
Rank #32/66 · confidence 3 · eval date 2026-03-05
Grok 4.20
winner1252.0
Rank #30/66 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner64.9
Rank #4/50 · confidence 3 · eval date 2026-03-05
Grok 4.20
38.4
Rank #42/50 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner73.6
Rank #7/9 · confidence 3 · eval date 2026-03-05
Grok 4.20
62.8
Rank #9/9 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner75.1
Rank #12/46 · confidence 3 · eval date 2026-03-05
Grok 4.20
47.1
Rank #40/46 · confidence 2 · eval date 2026-03-10
GPT-5.4
winner74.7
Rank #14/53 · confidence 3 · eval date 2026-03-05
Grok 4.20
30.2
Rank #44/53 · confidence 2 · eval date 2026-03-10
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | Grok 4.20 |
|---|---|---|
| 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-5.4 | Grok 4.20 |
|---|---|---|
50 tests | GPT-5.4 speed / latency 50 tok/s / 7305ms input / output No data | Grok 4.20 speed / latency N/A / N/A input / output No data |
50 tests | GPT-5.4 speed / latency 49 tok/s / 5435ms input / output No data | Grok 4.20 speed / latency 67 tok/s / 1296ms input / output No data |
25 tests | GPT-5.4 speed / latency 41 tok/s / 6581ms input / output No data | Grok 4.20 speed / latency 82 tok/s / 10813ms input / output No data |
15 tests | GPT-5.4 speed / latency N/A / N/A input / output No data | Grok 4.20 speed / latency 103 tok/s / 9875ms input / output No data |
10 tests | GPT-5.4 speed / latency 61 tok/s / 3483ms input / output No data | Grok 4.20 speed / latency N/A / N/A input / output No data |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.240/M/$1.44/M | Grok 4.20 grok-4.20-fast speed / latency No data input / output $0/M | |
GPT-5.4 gpt-5.4-openai-compact speed / latency No data input / output $0/M/$0/M | Grok 4.20 grok-4.20-fast speed / latency No data input / output $0/M |
Weighted outcome: GPT-5.4. 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 |
|---|
