Data points: 109
Model compare
The readout for Claude Sonnet 4 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 0 to 100.
Evidence depth
109 data points
Includes 22 benchmark rows, 0 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 29 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 Claude Sonnet 4 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Sonnet 4 | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 0.0 pts | 100.0 pts |
| Benchmark category leads | 0 categories | 6 categories |
| Operational advantages | No data | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage |
| Context window | 1M tokens | 400K tokens |
| Max output | 64K tokens | 128K tokens |
| Modalities | Input ImageTextFile 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 | Claude Sonnet 4 | GPT-5.1 |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | May 2025 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | anthropic/claude-sonnet-4 | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Claude Sonnet 4 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Sonnet 4
Claude Sonnet 4 does not clearly lead in the benchmark or operational dimensions shared by both models.
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (Cheapest input price, Average speed, First-token latency, Free providers, 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
Claude Sonnet 4
47.9
Avg. score
GPT-5.1
52
GPT-5.1 leads by 3.5
GPT-5.1 leads by 2.4
GPT-5.1 leads by 4.7
GPT-5.1 leads by 3.8
GPT-5.1 leads by 1.0
No data
No data
GPT-5.1 leads by 8.8
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Sonnet 4
56.0
Rank #41/84 · confidence 1 · eval date 2025-05-01
GPT-5.1
56.0
Rank #41/84 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
$3.00/M
Rank #137/162 · confidence 4
GPT-5.1
winner$1.25/M
Rank #107/162 · confidence 4
Claude Sonnet 4
$6.00/M
Rank #137/162 · confidence 4
GPT-5.1
winner$3.44/M
Rank #117/162 · confidence 4
Claude Sonnet 4
$15.00/M
Rank #136/162 · confidence 4
GPT-5.1
winner$10.00/M
Rank #120/162 · confidence 4
Claude Sonnet 4
44.3
Rank #73/89 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner75.0
Rank #3/89 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
83.7%
Rank #32/125 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
Claude Sonnet 4
68.3%
Rank #117/188 · confidence 4
GPT-5.1
winner87.3%
Rank #33/188 · confidence 4
Claude Sonnet 4
1.1
Rank #54/73 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner4.9
Rank #34/73 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
4.0%
Rank #162/187 · confidence 4
GPT-5.1
winner26.5%
Rank #40/187 · confidence 4
Claude Sonnet 4
44.9%
Rank #66/115 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
Claude Sonnet 4
37.3%
Rank #94/185 · confidence 4
GPT-5.1
winner43.3%
Rank #42/185 · confidence 4
Claude Sonnet 4
37.3
Rank #71/96 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
22.4
Rank #68/90 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner37.6
Rank #31/90 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
68.3
Rank #76/96 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
4.0
Rank #89/96 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
25.5
Rank #64/99 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
40.8
Rank #73/90 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner51.3
Rank #65/90 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
62.4
Rank #47/57 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner75.5
Rank #23/57 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
1170.0
Rank #49/66 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner1212.0
Rank #38/66 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
45.4
Rank #60/86 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
39.7
Rank #38/50 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner41.2
Rank #35/50 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4
52.3
Rank #67/84 · confidence 1 · eval date 2025-05-01
GPT-5.1
winner81.9
Rank #52/84 · confidence 1 · eval date 2025-11-13
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Sonnet 4 | 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 | Claude Sonnet 4 | GPT-5.1 |
|---|---|---|
5 tests | Claude Sonnet 4 speed / latency 27 tok/s / 1036ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
5 tests | Claude Sonnet 4 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
0 tests | Claude Sonnet 4 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | Claude Sonnet 4 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | Claude Sonnet 4 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
Claude Sonnet 4 claude-sonnet-4-20250514 speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1-all speed / latency No data input / output $0/request | |
Claude Sonnet 4 claude-sonnet-4-20250514 speed / latency No data input / output $0.0086/M/$0.043/M | GPT-5.1 gpt-5.1-medium speed / latency No data input / output $0.179/M |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
