Data points: 141
Model compare
The readout for Claude Sonnet 4.6 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 48 to 52.
Evidence depth
141 data points
Includes 36 benchmark rows, 1 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 43 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 4.6 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Sonnet 4.6 | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 48.0 pts | 52.0 pts |
| Benchmark category leads | 4 categories | 4 categories |
| Operational advantages | Cheapest input price, Provider coverage | Average speed, First-token latency, Free providers |
| Context window | 1M tokens | 400K tokens |
| Max output | 128K tokens | 128K tokens |
| 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 | Claude Sonnet 4.6 | GPT-5.1 |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | Feb 2026 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | anthropic/claude-sonnet-4.6 | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Claude Sonnet 4.6 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Sonnet 4.6
Claude Sonnet 4.6 is stronger in benchmark categories (Agents, Coding, Knowledge, Multilingual) and operational dimensions (Cheapest input price, Provider coverage).
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Reasoning, Math, Multimodal, Instruction following) and operational dimensions (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
Claude Sonnet 4.6
54
Avg. score
GPT-5.1
55.5
Claude Sonnet 4.6 leads by 5.6
Claude Sonnet 4.6 leads by 4.6
GPT-5.1 leads by 2.3
Claude Sonnet 4.6 leads by 12.4
GPT-5.1 leads by 0.8
Claude Sonnet 4.6 leads by 1.2
GPT-5.1 leads by 22.4
GPT-5.1 leads by 10.3
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Sonnet 4.6
winner76.0
Rank #21/127 · confidence 3 · eval date 2026-02-01
GPT-5.1
72.0
Rank #27/127 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
77.1 tok/s
Rank #84/139 · confidence 4
GPT-5.1
winner109.7 tok/s
Rank #55/139 · confidence 4
Claude Sonnet 4.6
74.36 s
Rank #130/139 · confidence 4
GPT-5.1
winner30.09 s
Rank #103/139 · confidence 4
Claude Sonnet 4.6
74.36 s
Rank #134/139 · confidence 4
GPT-5.1
winner30.09 s
Rank #127/139 · confidence 4
Claude Sonnet 4.6
$3.00/M
Rank #139/163 · confidence 4
GPT-5.1
winner$1.25/M
Rank #109/163 · confidence 4
Claude Sonnet 4.6
$6.00/M
Rank #139/163 · confidence 4
GPT-5.1
winner$3.44/M
Rank #119/163 · confidence 4
Claude Sonnet 4.6
$15.00/M
Rank #138/163 · confidence 4
GPT-5.1
winner$10.00/M
Rank #122/163 · confidence 4
Claude Sonnet 4.6
57.7
Rank #63/89 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner75.0
Rank #3/89 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner80.9
Rank #12/70 · confidence 3 · eval date 2026-02-01
GPT-5.1
65.4
Rank #23/70 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
79.2%
Rank #68/125 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner87.0%
Rank #12/125 · confidence 4
Claude Sonnet 4.6
winner87.5%
Rank #30/187 · confidence 4
GPT-5.1
87.3%
Rank #32/187 · confidence 4
Claude Sonnet 4.6
winner30.0%
Rank #30/186 · confidence 4
GPT-5.1
26.5%
Rank #39/186 · confidence 4
Claude Sonnet 4.6
0.9
Rank #60/73 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner4.9
Rank #34/73 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner51.5
Rank #7/33 · confidence 3 · eval date 2026-02-01
GPT-5.1
24.6
Rank #18/33 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner46.2
Rank #17/85 · confidence 3 · eval date 2026-02-01
GPT-5.1
45.5
Rank #19/85 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner46.8%
Rank #28/184 · confidence 4
GPT-5.1
43.3%
Rank #41/184 · confidence 4
Claude Sonnet 4.6
winner46.9
Rank #33/96 · confidence 3 · eval date 2026-02-01
GPT-5.1
43.3
Rank #45/96 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner70.9
Rank #38/100 · confidence 3 · eval date 2026-02-01
GPT-5.1
64.9
Rank #52/100 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
8.3
Rank #19/35 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner12.5
Rank #16/35 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner32.4
Rank #18/47 · confidence 3 · eval date 2026-02-01
GPT-5.1
31.0
Rank #19/47 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner49.2
Rank #33/59 · confidence 3 · eval date 2026-02-01
GPT-5.1
47.5
Rank #35/59 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner83.6
Rank #13/92 · confidence 3 · eval date 2026-02-01
GPT-5.1
76.9
Rank #22/92 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner38.0
Rank #29/90 · confidence 3 · eval date 2026-02-01
GPT-5.1
37.6
Rank #31/90 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
79.9
Rank #63/96 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner87.3
Rank #36/96 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
13.2
Rank #63/96 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner26.5
Rank #39/96 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
35.9
Rank #43/99 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner65.9
Rank #58/90 · confidence 3 · eval date 2026-02-01
GPT-5.1
51.3
Rank #66/90 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner89.6
Rank #7/62 · confidence 3 · eval date 2026-02-01
GPT-5.1
84.0
Rank #8/62 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
84.4
Rank #8/81 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner91.9
Rank #1/81 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner1319.0
Rank #7/65 · confidence 3 · eval date 2026-02-01
GPT-5.1
1222.0
Rank #37/65 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
70.6
Rank #40/57 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner75.5
Rank #23/57 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner79.9
Rank #19/75 · confidence 3 · eval date 2026-02-01
GPT-5.1
72.5
Rank #35/75 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
41.2
Rank #69/86 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner72.9
Rank #30/86 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
winner62.9
Rank #8/50 · confidence 3 · eval date 2026-02-01
GPT-5.1
41.2
Rank #35/50 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
70.3
Rank #31/95 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner70.5
Rank #29/95 · confidence 1 · eval date 2025-11-13
Claude Sonnet 4.6
79.5
Rank #56/84 · confidence 3 · eval date 2026-02-01
GPT-5.1
winner81.9
Rank #54/84 · 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 4.6 | GPT-5.1 |
|---|---|---|
Winner: Claude Sonnet 4.6 | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 89 56100100100 | GPT-5.1 gpt-5.1 No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Sonnet 4.6 | GPT-5.1 |
|---|---|---|
25 tests | Claude Sonnet 4.6 speed / latency 40 tok/s / 3145ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
14 tests | Claude Sonnet 4.6 speed / latency 39 tok/s / 5723ms input / output No data | GPT-5.1 speed / latency 139 tok/s / 1654ms input / output No data |
10 tests | Claude Sonnet 4.6 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency 137 tok/s / 3299ms input / output No data |
10 tests | Claude Sonnet 4.6 speed / latency 41 tok/s / 3714ms input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
10 tests | Claude Sonnet 4.6 speed / latency 55 tok/s / 2094ms input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $2.40/M/$12.00/M | GPT-5.1 gpt-5.1 speed / latency No data input / output $0/request |
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 callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
