Data points: 91
The readout for Claude Sonnet 4.5 and Claude Sonnet 4.6, before the detailed comparison sheet.
Decision read
Claude Sonnet 4.6
Claude Sonnet 4.6 currently has the stronger profile, with verified wins split 0 to 5.
Evidence depth
91 data points
Includes 8 benchmark rows, 2 audit samples, and 10 provider examples.
Selection signal
Start with Claude Sonnet 4.6
The charts below split 20 high-signal samples across speed, scores, and audit health.
Model compare Claude Sonnet 4.5 vs Claude Sonnet 4.6claude-sonnet-4-5-vs-claude-sonnet-4-6 | Model A Claude Sonnet 4.5 | Model B Claude Sonnet 4.6 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 0 wins | 5 wins |
| Where it leads | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Claude Sonnet 4.5 | Claude Sonnet 4.6 |
|---|---|---|
| SciCode | 42.8%#32 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Sonnet 4.5 | Claude Sonnet 4.6 |
|---|---|---|
Winner: Claude Sonnet 4.6 | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 No audit yet | Claude Sonnet 4.6 claude-sonnet-4-6 |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Sonnet 4.5 | Claude Sonnet 4.6 |
|---|---|---|
35 tests | Claude Sonnet 4.5 speed / latency 45 tok/s / 3170ms input / output No data |
This report only uses LMSpeed data for Claude Sonnet 4.5 and Claude Sonnet 4.6: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Claude Sonnet 4.5 | Claude Sonnet 4.6 |
|---|---|---|
| When to choose each model | Claude Sonnet 4.5 Claude Sonnet 4.5 does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. | Claude Sonnet 4.6 Claude Sonnet 4.6 is stronger when you prioritize Average speed, First-token latency, Free providers, Provider coverage, Recent tests. |
TL;DR: Claude Sonnet 4.6 leads across 91 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Claude Sonnet 4.5 vs Claude Sonnet 4.6 into nearby model comparisons with enough verified LMSpeed data.
| Average speed, First-token latency, Free providers, Provider coverage, Recent tests |
| Model metadata | Claude Sonnet 4.5 exposes 1M tokens; notable signals: Text input, Image input, File input, Text output. | Claude Sonnet 4.6 exposes 1M tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Context window | 1M tokens | 1M tokens |
| Max output | 64K tokens | 128K tokens |
| Released | Sep 2025 | Feb 2026 |
| Modalities | Input TextImageFile Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | Claude | Claude |
| Knowledge cutoff | 2025-01-31 | No data |
| OpenRouter ID | anthropic/claude-sonnet-4.5 | anthropic/claude-sonnet-4.6 |
| References | No data | No data |
| Time to first answer token | 1.55 s#37 | 1.28 s#30 |
|---|
| Input price | $3.00/M#39 | $3.00/M#39 |
|---|
| Output price | $15.00/M#44 | $15.00/M#44 |
|---|
| Time to first token | 1.55 s#60 | 1.28 s#51 |
|---|
| GPQA | 72.7%#75 | 79.9%#58 |
|---|
| HLE | 7.1%#77 | 13.2%#58 |
|---|
| Blended price | $6.00/M#65 | $6.00/M#65 |
|---|
Audit score
84
PackyAPIWinner: Claude Sonnet 4.6 | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 No audit yet | Claude Sonnet 4.6 claude-sonnet-4-6 Audit score 81 727280100 |
|---|
Claude Sonnet 4.6
speed / latency
40 tok/s / 3145ms
input / output
No data
巨量API24 tests | Claude Sonnet 4.5 speed / latency 17 tok/s / 9739ms input / output No data | Claude Sonnet 4.6 speed / latency 39 tok/s / 5723ms input / output No data |
|---|
EasyMore10 tests | Claude Sonnet 4.5 speed / latency 29 tok/s / 9801ms input / output No data | Claude Sonnet 4.6 speed / latency 27 tok/s / 11925ms input / output No data |
|---|
ModelPool10 tests | Claude Sonnet 4.5 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.6 speed / latency 41 tok/s / 3714ms input / output No data |
|---|
YUNWU API10 tests | Claude Sonnet 4.5 speed / latency 41 tok/s / 3271ms input / output No data | Claude Sonnet 4.6 speed / latency N/A / N/A input / output No data |
|---|
Claude Sonnet 4.5 claude-sonnet-4.5 speed / latency No data input / output $0/M / $0/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $3.00/M / $15.00/M |
Claude Sonnet 4.5 c/claude-sonnet-4-5-20250929 speed / latency No data input / output $0.0004/M / $0.0004/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $3.00/M / $15.00/M |
Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0.0008/M / $0.0041/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0.0008/M / $0.0041/M |
Claude Sonnet 4.5 claude-sonnet-4-5 speed / latency No data input / output $0.020/M / $0.020/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0.060/M / $0.060/M |
Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0.030/M / $0.150/M | Claude Sonnet 4.6 claude-sonnet-4-6 speed / latency No data input / output $0.030/M / $0.150/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
