Data points: 78
Model compare
The readout for Claude 3.5 Sonnet 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
78 data points
Includes 11 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 19 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 3.5 Sonnet and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 0.0 pts | 100.0 pts |
| Benchmark category leads | 0 categories | 3 categories |
| Operational advantages | No data | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage |
| Context window | No data | 400K tokens |
| Max output | No data | 128K tokens |
| Modalities | No data | 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 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | No data | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | No data | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | No data | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Claude 3.5 Sonnet and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude 3.5 Sonnet
Claude 3.5 Sonnet 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 (Coding, Reasoning, 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 3.5 Sonnet
41.4
Avg. score
GPT-5.1
52
GPT-5.1
GPT-5.1 leads by 12.8
GPT-5.1 leads by 7.8
GPT-5.1
GPT-5.1 leads by 11.1
No data
No data
GPT-5.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude 3.5 Sonnet
44.0
Rank #72/84 · confidence 1 · eval date 2024-06-01
GPT-5.1
winner56.0
Rank #41/84 · confidence 1 · eval date 2025-11-13
Claude 3.5 Sonnet
$3.00/M
Rank #137/162 · confidence 4
GPT-5.1
winner$1.25/M
Rank #107/162 · confidence 4
Claude 3.5 Sonnet
$6.00/M
Rank #137/162 · confidence 4
GPT-5.1
winner$3.44/M
Rank #117/162 · confidence 4
Claude 3.5 Sonnet
$15.00/M
Rank #136/162 · confidence 4
GPT-5.1
winner$10.00/M
Rank #120/162 · confidence 4
Claude 3.5 Sonnet
77.2%
Rank #78/125 · confidence 4
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
Claude 3.5 Sonnet
59.9%
Rank #141/188 · confidence 4
GPT-5.1
winner87.3%
Rank #33/188 · confidence 4
Claude 3.5 Sonnet
3.9%
Rank #165/187 · confidence 4
GPT-5.1
winner26.5%
Rank #40/187 · confidence 4
Claude 3.5 Sonnet
38.1%
Rank #77/115 · confidence 4
GPT-5.1
winner86.8%
Rank #4/115 · confidence 4
Claude 3.5 Sonnet
36.6%
Rank #100/185 · confidence 4
GPT-5.1
winner43.3%
Rank #42/185 · confidence 4
Claude 3.5 Sonnet
2.1
Rank #43/47 · confidence 1 · eval date 2024-06-01
GPT-5.1
winner31.0
Rank #19/47 · confidence 1 · eval date 2025-11-13
Claude 3.5 Sonnet
25.9
Rank #52/56 · confidence 1 · eval date 2024-06-01
GPT-5.1
winner49.9
Rank #30/56 · 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 3.5 Sonnet | 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 3.5 Sonnet | GPT-5.1 |
|---|---|---|
10 tests | Claude 3.5 Sonnet speed / latency 8 tok/s / 2740ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
0 tests | Claude 3.5 Sonnet 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 3.5 Sonnet 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 3.5 Sonnet 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 3.5 Sonnet speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
Claude 3.5 Sonnet claude-3-5-sonnet-20240620 speed / latency No data input / output $0.0086/M/$0.043/M | GPT-5.1 gpt-5.1-high speed / latency No data input / output $0.179/M | |
Claude 3.5 Sonnet claude-3-5-sonnet-all speed / latency No data input / output $0.011/request | GPT-5.1 gpt-5.1-high speed / latency No data input / output $1.25/M | |
Claude 3.5 Sonnet claude-3-5-sonnet-all speed / latency No data input / output $0.0088/request | GPT-5.1 gpt-5.1-2025-11-13 speed / latency No data input / output $1.25/M |
Weighted outcome: GPT-5.1. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
| Features | None listed | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
