Data points: 82
Model compare
The readout for Claude 3.5 Haiku and Claude Sonnet 4.5, before the detailed comparison sheet.
Weighted outcome: Claude Sonnet 4.5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Claude Sonnet 4.5
Claude Sonnet 4.5 has the higher weighted result; Model A / B score 8 to 92.
Evidence depth
82 data points
Includes 8 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with Claude Sonnet 4.5
The charts below split 16 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 3.5 Haiku and Claude Sonnet 4.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude 3.5 Haiku | Claude Sonnet 4.5 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 8.0 pts | 92.0 pts |
| Benchmark category leads | 0 categories | 3 categories |
| Operational advantages | Average speed, First-token latency | Cheapest input price, Free providers, Provider coverage |
| Context window | 200K tokens | 1M tokens |
| Max output | 8.2K tokens | 64K tokens |
| Modalities | Input TextImage 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 3.5 Haiku | Claude Sonnet 4.5 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Released | Nov 2024 | Sep 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | Claude |
| Knowledge cutoff | 2024-07-31 | 2025-01-31 |
| OpenRouter ID | anthropic/claude-3.5-haiku | anthropic/claude-sonnet-4.5 |
| References | No data | No data |
This report only uses LMSpeed data for Claude 3.5 Haiku and Claude Sonnet 4.5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude 3.5 Haiku
Claude 3.5 Haiku has these operational advantages: Average speed, First-token latency.
Claude Sonnet 4.5
Claude Sonnet 4.5 is stronger in benchmark categories (Coding, Reasoning, Math) and operational dimensions (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 3.5 Haiku
41.4
Avg. score
Claude Sonnet 4.5
48.3
Claude Sonnet 4.5
Claude Sonnet 4.5 leads by 10.6
Claude Sonnet 4.5 leads by 5.9
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude 3.5 Haiku
winner$4.00/M
Rank #94/163 · confidence 4
Claude Sonnet 4.5
$15.00/M
Rank #138/163 · confidence 4
Claude 3.5 Haiku
winner$1.60/M
Rank #96/163 · confidence 4
Claude Sonnet 4.5
$6.00/M
Rank #139/163 · confidence 4
Claude 3.5 Haiku
winner$0.800/M
Rank #97/163 · confidence 4
Claude Sonnet 4.5
$3.00/M
Rank #139/163 · confidence 4
Claude 3.5 Haiku
63.4%
Rank #113/125 · confidence 4
Claude Sonnet 4.5
winner86.0%
Rank #20/125 · confidence 4
Claude 3.5 Haiku
40.8%
Rank #175/187 · confidence 4
Claude Sonnet 4.5
winner72.7%
Rank #107/187 · confidence 4
Claude 3.5 Haiku
3.5%
Rank #176/186 · confidence 4
Claude Sonnet 4.5
winner7.1%
Rank #111/186 · confidence 4
Claude 3.5 Haiku
27.4%
Rank #148/184 · confidence 4
Claude Sonnet 4.5
winner42.8%
Rank #43/184 · confidence 4
Claude 3.5 Haiku
31.4%
Rank #87/115 · confidence 4
Claude Sonnet 4.5
winner59.0%
Rank #45/115 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude 3.5 Haiku | 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 3.5 Haiku | Claude Sonnet 4.5 |
|---|---|---|
5 tests | Claude 3.5 Haiku speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency 29 tok/s / 9801ms input / output No data |
5 tests | Claude 3.5 Haiku speed / latency 42 tok/s / 2458ms input / output No data | Claude Sonnet 4.5 speed / latency N/A / N/A input / output No data |
0 tests | Claude 3.5 Haiku speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency N/A / N/A input / output No data |
0 tests | Claude 3.5 Haiku speed / latency N/A / N/A input / output No data | Claude Sonnet 4.5 speed / latency N/A / N/A input / output No data |
0 tests | Claude 3.5 Haiku 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 3.5 Haiku claude-3-5-haiku-20241022 speed / latency No data input / output $0.034/M/$0.171/M | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $20.55/M | |
Claude 3.5 Haiku claude-3-5-haiku-latest speed / latency No data input / output $0.035/M/$0.174/M | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0.521/M | |
Claude 3.5 Haiku claude-3-5-haiku-20241022 speed / latency No data input / output $0.074/M/$0.371/M | Claude Sonnet 4.5 claude-sonnet-4-5-20250929 speed / latency No data input / output $0.664/M |
Weighted outcome: Claude Sonnet 4.5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputImage inputText outputTool calling | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
Claude Sonnet 4.5
Claude Sonnet 4.5 leads by 0.1
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