Data points: 78
The readout for Claude Opus 4.1 and Claude Sonnet 4.5, before the detailed comparison sheet.
Decision read
Claude Sonnet 4.5
Claude Sonnet 4.5 currently has the stronger profile, with verified wins split 1 to 5.
Evidence depth
78 data points
Includes 6 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with Claude Sonnet 4.5
The charts below split 16 high-signal samples across speed, scores, and audit health.
Model compare Claude Opus 4.1 vs Claude Sonnet 4.5claude-opus-4-1-vs-claude-sonnet-4-5 | Model A Claude Opus 4.1 | Model B Claude Sonnet 4.5 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 1 wins | 5 wins |
| Where it leads | First-token latency |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Claude Opus 4.1 | Claude Sonnet 4.5 |
|---|---|---|
| Time to first answer token | 1.98 s#43 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.1 | Claude Sonnet 4.5 |
|---|---|---|
| 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 | Claude Sonnet 4.5 |
|---|---|---|
10 tests | Claude Opus 4.1 speed / latency N/A / N/A input / output No data |
This report only uses LMSpeed data for Claude Opus 4.1 and Claude Sonnet 4.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Claude Opus 4.1 | Claude Sonnet 4.5 |
|---|---|---|
| When to choose each model | Claude Opus 4.1 Claude Opus 4.1 is stronger when you prioritize First-token latency. | Claude Sonnet 4.5 Claude Sonnet 4.5 is stronger when you prioritize Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests. |
TL;DR: Claude Sonnet 4.5 leads across 78 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Claude Opus 4.1 vs Claude Sonnet 4.5 into nearby model comparisons with enough verified LMSpeed data.
| Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests |
| Model metadata | Claude Opus 4.1 exposes 200K tokens; notable signals: Text input, Image input, File input, Text output. | Claude Sonnet 4.5 exposes 1M tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Context window | 200K tokens | 1M tokens |
| Max output | 32K tokens | 64K tokens |
| Released | Aug 2025 | Sep 2025 |
| Modalities | Input ImageTextFile 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 | 2025-01-31 |
| OpenRouter ID | anthropic/claude-opus-4.1 | anthropic/claude-sonnet-4.5 |
| References | No data | No data |
| Input price | $15.00/M#43 | $3.00/M#39 |
|---|
| Output price | $75.00/M#52 | $15.00/M#44 |
|---|
| Time to first token | 1.98 s#70 | 1.55 s#60 |
|---|
| Blended price | $30.00/M#73 | $6.00/M#65 |
|---|
| Output speed | 36.8 tok/s#104 | 47.9 tok/s#92 |
|---|
Claude Sonnet 4.5
speed / latency
41 tok/s / 3271ms
input / output
No data
天宫造物10 tests | Claude Opus 4.1 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency 45 tok/s / 3170ms input / output No data |
|---|
EasyMore5 tests | Claude Opus 4.1 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency 29 tok/s / 9801ms input / output No data |
|---|
N1N5 tests | Claude Opus 4.1 speed / latency 17 tok/s / 3847ms input / output No data | Claude Sonnet 4.5 speed / latency N/A / N/A input / output No data |
|---|
180txt API0 tests | Claude Opus 4.1 speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency N/A / N/A input / output No data |
|---|
Claude Opus 4.1 c/claude-opus-4-1-20250805 speed / latency No data input / output $0.0017/M / $0.0017/M | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $3.00/M / $15.00/M |
Claude Opus 4.1 claude-opus-4-1-20250805 speed / latency No data input / output $0.205/M / $1.03/M | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0.041/M / $0.205/M |
Claude Opus 4.1 claude-opus-4-1-20250805 speed / latency No data input / output $0.616/M / $3.08/M | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0.123/M / $0.616/M |
Claude Opus 4.1 claude-opus-4-1-20250805 speed / latency No data input / output $0.342/M / $1.71/M | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0.205/M / $1.03/M |
Claude Opus 4.1 claude-opus-4-1-20250805 speed / latency No data input / output $1.29/M / $6.43/M | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0.257/M / $1.29/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
