Data points: 123
Model compare
The readout for Claude Opus 4.6 and Claude Sonnet 4, before the detailed comparison sheet.
Weighted outcome: Claude Opus 4.6. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Claude Opus 4.6
Claude Opus 4.6 has the higher weighted result; Model A / B score 82.7 to 17.3.
Evidence depth
123 data points
Includes 24 benchmark rows, 2 audit samples, and 7 provider examples.
Selection signal
Start with Claude Opus 4.6
The charts below split 33 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 4.6 and Claude Sonnet 4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Opus 4.6 | Claude Sonnet 4 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 82.7 pts | 17.3 pts |
| Benchmark category leads | 5 categories | 1 categories |
| Operational advantages | Cheapest input price, Average speed, Free providers, Provider coverage | First-token latency |
| Context window | 1M tokens | 1M tokens |
| Max output | 128K tokens | 64K 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 Opus 4.6 | Claude Sonnet 4 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Released | Feb 2026 | May 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | Claude |
| Knowledge cutoff | No data | 2025-01-31 |
| OpenRouter ID | anthropic/claude-opus-4.6 | anthropic/claude-sonnet-4 |
| References | No data | No data |
This report only uses LMSpeed data for Claude Opus 4.6 and Claude Sonnet 4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Opus 4.6
Claude Opus 4.6 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Math) and operational dimensions (Cheapest input price, Average speed, Free providers, Provider coverage).
Claude Sonnet 4
Claude Sonnet 4 is stronger in benchmark categories (Instruction following) and operational dimensions (First-token latency).
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 4.6
53.4
Avg. score
Claude Sonnet 4
47.9
Claude Opus 4.6 leads by 11.0
Claude Opus 4.6 leads by 12.6
Claude Opus 4.6 leads by 5.9
Claude Opus 4.6 leads by 3.6
Claude Opus 4.6 leads by 3.5
Claude Opus 4.6
Claude Opus 4.6
Claude Sonnet 4 leads by 0.3
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Opus 4.6
winner68.0
Rank #17/84 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
56.0
Rank #41/84 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
$25.00/M
Rank #147/162 · confidence 4
Claude Sonnet 4
winner$15.00/M
Rank #136/162 · confidence 4
Claude Opus 4.6
$10.00/M
Rank #147/162 · confidence 4
Claude Sonnet 4
winner$6.00/M
Rank #137/162 · confidence 4
Claude Opus 4.6
$5.00/M
Rank #146/162 · confidence 4
Claude Sonnet 4
winner$3.00/M
Rank #137/162 · confidence 4
Claude Opus 4.6
82.0%
Rank #47/125 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
winner83.7%
Rank #32/125 · confidence 4
Claude Opus 4.6
winner2.8
Rank #43/73 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
1.1
Rank #54/73 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner84.0%
Rank #53/188 · confidence 4
Claude Sonnet 4
68.3%
Rank #117/188 · confidence 4
Claude Opus 4.6
winner58.3
Rank #62/89 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
44.3
Rank #73/89 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner18.6%
Rank #62/187 · confidence 4
Claude Sonnet 4
4.0%
Rank #162/187 · confidence 4
Claude Opus 4.6
winner80.8
Rank #7/43 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
72.7
Rank #33/43 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner63.7
Rank #8/65 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
48.4
Rank #44/65 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner45.7%
Rank #33/185 · confidence 4
Claude Sonnet 4
37.3%
Rank #94/185 · confidence 4
Claude Opus 4.6
winner45.7
Rank #37/96 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
37.3
Rank #71/96 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner45.2
Rank #15/90 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
22.4
Rank #68/90 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner37.8
Rank #39/99 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
25.5
Rank #64/99 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner76.0
Rank #44/90 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
40.8
Rank #73/90 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner84.0
Rank #52/96 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
68.3
Rank #76/96 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner18.6
Rank #56/96 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
4.0
Rank #89/96 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner1325.0
Rank #4/66 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
1175.0
Rank #49/66 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner72.5
Rank #36/57 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
62.4
Rank #47/57 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
44.6
Rank #61/86 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
winner45.4
Rank #60/86 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner36.7
Rank #6/20 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
18.4
Rank #15/20 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner61.9
Rank #10/50 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
39.7
Rank #38/50 · confidence 1 · eval date 2025-05-01
Claude Opus 4.6
winner84.8
Rank #44/84 · confidence 3 · eval date 2026-02-01
Claude Sonnet 4
52.3
Rank #67/84 · confidence 1 · eval date 2025-05-01
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.6 | Claude Sonnet 4 |
|---|---|---|
Winner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 84 648486100 | Claude Sonnet 4 claude-sonnet-4 No audit yet |
Winner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 78 70728088 | Claude Sonnet 4 claude-sonnet-4-20250514 No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Opus 4.6 | Claude Sonnet 4 |
|---|---|---|
20 tests | Claude Opus 4.6 speed / latency 40 tok/s / 16141ms input / output No data | Claude Sonnet 4 speed / latency N/A / N/A input / output No data |
15 tests | Claude Opus 4.6 speed / latency 57 tok/s / 3926ms input / output No data | Claude Sonnet 4 speed / latency N/A / N/A input / output No data |
15 tests | Claude Opus 4.6 speed / latency N/A / N/A input / output No data | Claude Sonnet 4 speed / latency 36 tok/s / 6227ms input / output No data |
10 tests | Claude Opus 4.6 speed / latency 26 tok/s / 1130ms input / output No data | Claude Sonnet 4 speed / latency 27 tok/s / 1036ms input / output No data |
10 tests | Claude Opus 4.6 speed / latency 84 tok/s / 3916ms input / output No data | Claude Sonnet 4 speed / latency N/A / N/A input / output No data |
Claude Opus 4.6 claude-opus-4-6 speed / latency No data input / output $0/request | Claude Sonnet 4 claude-sonnet-4-20250514 speed / latency No data input / output $0/request | |
Claude Opus 4.6 claude-opus-4-6-c speed / latency No data input / output $0.0082/request | Claude Sonnet 4 claude-sonnet-4 speed / latency No data input / output $20.55/M |
Weighted outcome: Claude Opus 4.6. 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 callingReasoning |
|---|
