Data points: 170
Model compare
The readout for Claude Opus 4.8 and Claude Sonnet 4.6, before the detailed comparison sheet.
Weighted outcome: Claude Opus 4.8. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Claude Opus 4.8
Claude Opus 4.8 has the higher weighted result; Model A / B score 84.6 to 15.4.
Evidence depth
170 data points
Includes 33 benchmark rows, 6 audit samples, and 8 provider examples.
Selection signal
Start with Claude Opus 4.8
The charts below split 47 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 4.8 and Claude Sonnet 4.6: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Opus 4.8 | Claude Sonnet 4.6 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 84.6 pts | 15.4 pts |
| Benchmark category leads | 6 categories | 1 categories |
| Operational advantages | Cheapest input price, Average speed, First-token latency, Free providers | Provider coverage |
| Context window | 1M tokens | 1M tokens |
| Max output | 128K tokens | 128K tokens |
| Modalities | Input TextImageFile Output Text | Input |
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 4.8 | Claude Sonnet 4.6 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Released | May 2026 | Feb 2026 |
| Parameters | No data | No data |
| Tokenizer | Claude | Claude |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | anthropic/claude-opus-4.8 | anthropic/claude-sonnet-4.6 |
| References | No data | No data |
This report only uses LMSpeed data for Claude Opus 4.8 and Claude Sonnet 4.6: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Opus 4.8
Claude Opus 4.8 is stronger in benchmark categories (Agents, Coding, Reasoning, Math, Multimodal) and operational dimensions (Cheapest input price, Average speed, First-token latency, Free providers).
Claude Sonnet 4.6
Claude Sonnet 4.6 is stronger in benchmark categories (Knowledge) and operational dimensions (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 4.8
59.5
Avg. score
Claude Sonnet 4.6
53.2
Claude Opus 4.8 leads by 9.9
Claude Opus 4.8 leads by 9.7
Claude Opus 4.8 leads by 6.5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Opus 4.8
winner78.0
Rank #5/84 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
63.0
Rank #25/84 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
$25.00/M
Rank #147/162 · confidence 4
Claude Sonnet 4.6
winner$15.00/M
Rank #136/162 · confidence 4
Claude Opus 4.8
$10.00/M
Rank #147/162 · confidence 4
Claude Sonnet 4.6
winner$6.00/M
Rank #137/162 · confidence 4
Claude Opus 4.8
$5.00/M
Rank #146/162 · confidence 4
Claude Sonnet 4.6
winner$3.00/M
Rank #137/162 · confidence 4
Claude Opus 4.8
winner45.7%
Rank #5/187 · confidence 4
Claude Sonnet 4.6
30.0%
Rank #31/187 · confidence 4
Claude Opus 4.8
winner20.9
Rank #9/73 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
0.9
Rank #60/73 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner92.0%
Rank #11/188 · confidence 4
Claude Sonnet 4.6
87.5%
Rank #31/188 · confidence 4
Claude Opus 4.8
winner67.7
Rank #29/89 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
57.7
Rank #63/89 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner46.5
Rank #2/8 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
24.3
Rank #8/8 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner88.6
Rank #2/43 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
79.6
Rank #13/43 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner58.4
Rank #3/6 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
48.8
Rank #5/6 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner69.1
Rank #4/65 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
63.7
Rank #8/65 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner53.5%
Rank #10/185 · confidence 4
Claude Sonnet 4.6
46.8%
Rank #29/185 · confidence 4
Claude Opus 4.8
winner53.5
Rank #13/96 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
46.9
Rank #33/96 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner31.3
Rank #7/35 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
8.3
Rank #19/35 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner47.2
Rank #8/47 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
32.4
Rank #18/47 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner66.9
Rank #16/56 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
49.5
Rank #31/56 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner87.6
Rank #2/55 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
76.9
Rank #18/55 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner45.7
Rank #3/96 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
13.2
Rank #63/96 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner55.7
Rank #4/99 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
35.9
Rank #43/99 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner46.6
Rank #10/90 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
38.0
Rank #29/90 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner92.0
Rank #11/96 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
79.9
Rank #63/96 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
35.9
Rank #78/90 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
winner65.9
Rank #57/90 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner90.2
Rank #1/35 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
57.5
Rank #25/35 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner89.9
Rank #3/22 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
77.4
Rank #17/22 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
1268.0
Rank #26/66 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
winner1310.0
Rank #9/66 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner62.2
Rank #51/86 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
41.2
Rank #69/86 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner73.0
Rank #1/50 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
62.9
Rank #8/50 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner83.4
Rank #2/21 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
72.1
Rank #11/21 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner20.6
Rank #4/11 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
8.3
Rank #8/11 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner83.2
Rank #9/53 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
54.7
Rank #30/53 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner74.6
Rank #13/46 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
59.1
Rank #30/46 · confidence 3 · eval date 2026-02-01
Claude Opus 4.8
winner94.4
Rank #22/84 · confidence 3 · eval date 2026-05-28
Claude Sonnet 4.6
79.5
Rank #55/84 · confidence 3 · eval date 2026-02-01
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.8 | Claude Sonnet 4.6 |
|---|---|---|
Winner: Claude Opus 4.8 | Claude Opus 4.8 claude-opus-4-8 Audit score 100 100100100100 | Claude Sonnet 4.6 claude-sonnet-4-6 No audit yet |
Winner: Claude Opus 4.8 | Claude Opus 4.8 claude-opus-4-8 Audit score 94 76100100100 | Claude Sonnet 4.6 claude-sonnet-4-6 No audit yet |
Winner: Claude Sonnet 4.6 | Claude Opus 4.8 claude-opus-4-8 Audit score 78 70728088 | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 94 76 |
Winner: Claude Sonnet 4.6 | Claude Opus 4.8 claude-opus-4-8 Audit score 91 7610086100 | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 94 76 |
Winner: Claude Sonnet 4.6 | Claude Opus 4.8 claude-opus-4-8-thinking No audit yet | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 91 64100100100 |
Winner: Claude Opus 4.8 | Claude Opus 4.8 claude-opus-4-8 Audit score 91 7610086100 | Claude Sonnet 4.6 claude-sonnet-4-6 No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Opus 4.8 | Claude Sonnet 4.6 |
|---|---|---|
25 tests | Claude Opus 4.8 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.6 speed / latency 32 tok/s / 6074ms input / output No data |
15 tests | Claude Opus 4.8 speed / latency 46 tok/s / 2538ms input / output No data | Claude Sonnet 4.6 speed / latency 48 tok/s / 1587ms input / output No data |
10 tests | Claude Opus 4.8 speed / latency 882 tok/s / 127ms input / output No data | Claude Sonnet 4.6 speed / latency N/A / N/A input / output No data |
10 tests | Claude Opus 4.8 speed / latency 47 tok/s / 3308ms input / output No data | Claude Sonnet 4.6 speed / latency 48 tok/s / 718ms input / output No data |
10 tests | Claude Opus 4.8 speed / latency 43 tok/s / 2368ms input / output No data | Claude Sonnet 4.6 speed / latency N/A / N/A input / output No data |
Claude Opus 4.8 claude-opus-4-8 speed / latency No data input / output $0/M/$0/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0.288/M | |
Claude Opus 4.8 claude-opus-4-8 speed / latency No data input / output $0/request | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0/request | |
Claude Opus 4.8 claude-opus-4-8 speed / latency No data input / output $0.0010/M/$0.0051/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0.822/M |
Weighted outcome: Claude Opus 4.8. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
Claude Sonnet 4.6 leads by 6.9
Claude Opus 4.8 leads by 4.8
Claude Opus 4.8
Claude Opus 4.8 leads by 18.2
Claude Opus 4.8 leads by 6.4
