Data points: 77
Model compare
The readout for Claude Opus 4.1 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 30.7 to 69.3.
Evidence depth
77 data points
Includes 6 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with GPT-5.1
The charts below split 12 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 Opus 4.1 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Opus 4.1 | GPT-5.1 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 30.7 pts | 69.3 pts |
| Benchmark category leads | 1 categories | 2 categories |
| Operational advantages | Free providers | Cheapest input price, Average speed, First-token latency, Provider coverage |
| Context window | 200K tokens | 400K tokens |
| Max output | 32K 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 Opus 4.1 | GPT-5.1 |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | Aug 2025 | Nov 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | anthropic/claude-opus-4.1 | openai/gpt-5.1 |
| References | No data | No data |
This report only uses LMSpeed data for Claude Opus 4.1 and GPT-5.1: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Opus 4.1
Claude Opus 4.1 is stronger in benchmark categories (Knowledge) and operational dimensions (Free providers).
GPT-5.1
GPT-5.1 is stronger in benchmark categories (Agents, Coding) and operational dimensions (Cheapest input price, Average speed, First-token latency, 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 Opus 4.1
51.4
Avg. score
GPT-5.1
52
GPT-5.1 leads by 1.0
GPT-5.1 leads by 1.8
GPT-5.1
Claude Opus 4.1 leads by 5.7
GPT-5.1
No data
No data
GPT-5.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Opus 4.1
winner57.0
Rank #38/84 · confidence 1 · eval date 2025-08-01
GPT-5.1
56.0
Rank #41/84 · confidence 1 · eval date 2025-11-13
Claude Opus 4.1
$15.00/M
Rank #155/162 · confidence 4
GPT-5.1
winner$1.25/M
Rank #107/162 · confidence 4
Claude Opus 4.1
$30.00/M
Rank #156/162 · confidence 4
GPT-5.1
winner$3.44/M
Rank #117/162 · confidence 4
Claude Opus 4.1
$75.00/M
Rank #157/162 · confidence 4
GPT-5.1
winner$10.00/M
Rank #120/162 · confidence 4
Claude Opus 4.1
28.2
Rank #61/99 · confidence 1 · eval date 2025-08-01
GPT-5.1
winner36.9
Rank #42/99 · confidence 1 · eval date 2025-11-13
Claude Opus 4.1
1207.0
Rank #42/66 · confidence 1 · eval date 2025-08-01
GPT-5.1
winner1217.0
Rank #39/66 · 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 Opus 4.1 | 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 Opus 4.1 | GPT-5.1 |
|---|---|---|
10 tests | Claude Opus 4.1 speed / latency 17 tok/s / 3847ms input / output No data | GPT-5.1 speed / latency 96 tok/s / 1862ms input / output No data |
0 tests | Claude Opus 4.1 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 Opus 4.1 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 Opus 4.1 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 Opus 4.1 speed / latency N/A / N/A input / output No data | GPT-5.1 speed / latency N/A / N/A input / output No data |
Claude Opus 4.1 claude-opus-4-1-20250805 speed / latency No data input / output $0/request | GPT-5.1 gpt-5.1-chat-latest 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 |
|---|
