Data points: 122
Model compare
The readout for Claude Opus 4.5 and Claude Sonnet 4.5, before the detailed comparison sheet.
Weighted outcome: Claude Opus 4.5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Claude Opus 4.5
Claude Opus 4.5 has the higher weighted result; Model A / B score 88 to 12.
Evidence depth
122 data points
Includes 26 benchmark rows, 1 audit samples, and 7 provider examples.
Selection signal
Start with Claude Opus 4.5
The charts below split 34 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 4.5 and Claude Sonnet 4.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Opus 4.5 | Claude Sonnet 4.5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 88.0 pts | 12.0 pts |
| Benchmark category leads | 5 categories | 0 categories |
| Operational advantages | Average speed, First-token latency | Cheapest input price, Free providers, Provider coverage |
| Context window | 200K tokens | 1M tokens |
| Max output | 64K tokens | 64K tokens |
| Modalities | Input FileImageText 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 4.5 | Claude Sonnet 4.5 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Released | Nov 2025 | Sep 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | Claude |
| Knowledge cutoff | No data | 2025-01-31 |
| OpenRouter ID | anthropic/claude-opus-4.5 | anthropic/claude-sonnet-4.5 |
| References | No data | No data |
This report only uses LMSpeed data for Claude Opus 4.5 and Claude Sonnet 4.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Opus 4.5
Claude Opus 4.5 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (Average speed, First-token latency).
Claude Sonnet 4.5
Claude Sonnet 4.5 has these operational advantages: Cheapest input price, 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 Opus 4.5
50.9
Avg. score
Claude Sonnet 4.5
48.3
Claude Opus 4.5 leads by 2.6
Claude Opus 4.5 leads by 5.2
Claude Opus 4.5 leads by 17.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Opus 4.5
winner60.0
Rank #33/83 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
48.0
Rank #63/83 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner1.29 s
Rank #48/139 · confidence 4
Claude Sonnet 4.5
1.47 s
Rank #51/139 · confidence 4
Claude Opus 4.5
winner1.29 s
Rank #81/139 · confidence 4
Claude Sonnet 4.5
1.47 s
Rank #87/139 · confidence 4
Claude Opus 4.5
winner51.6 tok/s
Rank #110/139 · confidence 4
Claude Sonnet 4.5
48.4 tok/s
Rank #115/139 · confidence 4
Claude Opus 4.5
$25.00/M
Rank #148/163 · confidence 4
Claude Sonnet 4.5
winner$15.00/M
Rank #138/163 · confidence 4
Claude Opus 4.5
$10.00/M
Rank #148/163 · confidence 4
Claude Sonnet 4.5
winner$6.00/M
Rank #139/163 · confidence 4
Claude Opus 4.5
$5.00/M
Rank #147/163 · confidence 4
Claude Sonnet 4.5
winner$3.00/M
Rank #139/163 · confidence 4
Claude Opus 4.5
winner91.5
Rank #3/19 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
29.4
Rank #19/19 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner88.9%
Rank #4/125 · confidence 4
Claude Sonnet 4.5
86.0%
Rank #20/125 · confidence 4
Claude Opus 4.5
winner81.0%
Rank #72/187 · confidence 4
Claude Sonnet 4.5
72.7%
Rank #107/187 · confidence 4
Claude Opus 4.5
winner12.9%
Rank #79/186 · confidence 4
Claude Sonnet 4.5
7.1%
Rank #111/186 · confidence 4
Claude Opus 4.5
winner80.9
Rank #6/43 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
77.2
Rank #20/43 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner73.8%
Rank #24/115 · confidence 4
Claude Sonnet 4.5
59.0%
Rank #45/115 · confidence 4
Claude Opus 4.5
winner47.0%
Rank #24/184 · confidence 4
Claude Sonnet 4.5
42.8%
Rank #43/184 · confidence 4
Claude Opus 4.5
60.0
Rank #26/64 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
winner60.9
Rank #25/64 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner58.6
Rank #23/56 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
35.1
Rank #41/56 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
4.2
Rank #23/35 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
4.2
Rank #23/35 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner20.7
Rank #29/47 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
13.5
Rank #33/47 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
62.2
Rank #38/54 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
winner72.1
Rank #25/54 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner1279.0
Rank #23/65 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
1222.0
Rank #36/65 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner64.2
Rank #6/50 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
48.5
Rank #26/50 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner23.3
Rank #6/9 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
17.0
Rank #8/9 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner32.3
Rank #8/19 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
27.7
Rank #9/19 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner66.3
Rank #14/21 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
61.4
Rank #16/21 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner59.3
Rank #27/45 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
50.0
Rank #37/45 · confidence 2 · eval date 2025-09-01
Claude Opus 4.5
winner48.0
Rank #35/52 · confidence 4 · eval date 2025-11-01
Claude Sonnet 4.5
33.5
Rank #41/52 · confidence 2 · eval date 2025-09-01
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.5 | Claude Sonnet 4.5 |
|---|---|---|
Winner: Claude Sonnet 4.5 | Claude Opus 4.5 claude-opus-4.5 No audit yet | Claude Sonnet 4.5 claude-sonnet-4.5 Audit score 91 64100100100 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Opus 4.5 | Claude Sonnet 4.5 |
|---|---|---|
15 tests | Claude Opus 4.5 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency 46 tok/s / 5111ms input / output No data |
15 tests | Claude Opus 4.5 speed / latency 56 tok/s / 2598ms input / output No data | Claude Sonnet 4.5 speed / latency N/A / N/A input / output No data |
10 tests | Claude Opus 4.5 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency 41 tok/s / 3271ms input / output No data |
10 tests | Claude Opus 4.5 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency 45 tok/s / 3170ms input / output No data |
5 tests | Claude Opus 4.5 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency 44 tok/s / 2522ms input / output No data |
Claude Opus 4.5 claude-opus-4.5 speed / latency No data input / output $0/M/$0/M | Claude Sonnet 4.5 claude-sonnet-4-5 speed / latency No data input / output $5.47/M | |
Claude Opus 4.5 claude-opus-4-5-20251101 speed / latency No data input / output $0/request | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0/request |
Weighted outcome: Claude Opus 4.5. 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 |
|---|
Claude Opus 4.5 leads by 4.6
Claude Opus 4.5 leads by 7.3
Claude Opus 4.5
Claude Opus 4.5
Claude Opus 4.5
