Data points: 91
Model compare
The readout for Claude Haiku 4.5 and Claude Sonnet 4, before the detailed comparison sheet.
Weighted outcome: Claude Sonnet 4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
Claude Sonnet 4
Claude Sonnet 4 has the higher weighted result; Model A / B score 40 to 60.
Evidence depth
91 data points
Includes 13 benchmark rows, 0 audit samples, and 6 provider examples.
Selection signal
Start with Claude Sonnet 4
The charts below split 19 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 Haiku 4.5 and Claude Sonnet 4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Haiku 4.5 | Claude Sonnet 4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 40.0 pts | 60.0 pts |
| Benchmark category leads | 1 categories | 3 categories |
| Operational advantages | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage | No data |
| Context window | 200K tokens | 1M tokens |
| Max output | 64K 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 Haiku 4.5 | Claude Sonnet 4 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Released | Oct 2025 | May 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | Claude |
| Knowledge cutoff | No data | 2025-01-31 |
| OpenRouter ID | anthropic/claude-haiku-4.5 | anthropic/claude-sonnet-4 |
| References | No data | No data |
This report only uses LMSpeed data for Claude Haiku 4.5 and Claude Sonnet 4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Haiku 4.5
Claude Haiku 4.5 is stronger in benchmark categories (Coding) and operational dimensions (Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage).
Claude Sonnet 4
Claude Sonnet 4 leads these benchmark categories: Agents, Reasoning, Math.
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 Haiku 4.5
45.9
Avg. score
Claude Sonnet 4
47.9
Claude Sonnet 4 leads by 1.6
Claude Haiku 4.5 leads by 0.1
Claude Sonnet 4 leads by 0.1
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Haiku 4.5
53.0
Rank #50/84 · confidence 1 · eval date 2025-10-15
Claude Sonnet 4
winner56.0
Rank #41/84 · confidence 1 · eval date 2025-05-01
Claude Haiku 4.5
winner$1.00/M
Rank #98/162 · confidence 4
Claude Sonnet 4
$3.00/M
Rank #137/162 · confidence 4
Claude Haiku 4.5
winner$2.00/M
Rank #101/162 · confidence 4
Claude Sonnet 4
$6.00/M
Rank #137/162 · confidence 4
Claude Haiku 4.5
winner$5.00/M
Rank #104/162 · confidence 4
Claude Sonnet 4
$15.00/M
Rank #136/162 · confidence 4
Claude Haiku 4.5
80.0%
Rank #61/125 · confidence 4
Claude Sonnet 4
winner83.7%
Rank #32/125 · confidence 4
Claude Haiku 4.5
64.6%
Rank #131/188 · confidence 4
Claude Sonnet 4
winner68.3%
Rank #117/188 · confidence 4
Claude Haiku 4.5
winner4.3%
Rank #150/187 · confidence 4
Claude Sonnet 4
4.0%
Rank #162/187 · confidence 4
Claude Haiku 4.5
winner73.3
Rank #32/43 · confidence 1 · eval date 2025-10-15
Claude Sonnet 4
72.7
Rank #33/43 · confidence 1 · eval date 2025-05-01
Claude Haiku 4.5
winner49.2
Rank #43/65 · confidence 1 · eval date 2025-10-15
Claude Sonnet 4
48.4
Rank #44/65 · confidence 1 · eval date 2025-05-01
Claude Haiku 4.5
winner51.1%
Rank #59/115 · confidence 4
Claude Sonnet 4
44.9%
Rank #66/115 · confidence 4
Claude Haiku 4.5
34.4%
Rank #115/185 · confidence 4
Claude Sonnet 4
winner37.3%
Rank #94/185 · confidence 4
Claude Haiku 4.5
1147.0
Rank #51/66 · confidence 1 · eval date 2025-10-15
Claude Sonnet 4
winner1170.0
Rank #49/66 · confidence 1 · eval date 2025-05-01
Claude Haiku 4.5
16.0
Rank #16/20 · confidence 1 · eval date 2025-10-15
Claude Sonnet 4
winner18.4
Rank #15/20 · 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 Haiku 4.5 | Claude Sonnet 4 |
|---|---|---|
| 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 Haiku 4.5 | Claude Sonnet 4 |
|---|---|---|
15 tests | Claude Haiku 4.5 speed / latency 112 tok/s / 1733ms input / output No data | Claude Sonnet 4 speed / latency N/A / N/A input / output No data |
15 tests | Claude Haiku 4.5 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 Haiku 4.5 speed / latency 21 tok/s / 1170ms input / output No data | Claude Sonnet 4 speed / latency 27 tok/s / 1036ms input / output No data |
10 tests | Claude Haiku 4.5 speed / latency 88 tok/s / 2243ms input / output No data | Claude Sonnet 4 speed / latency N/A / N/A input / output No data |
5 tests | Claude Haiku 4.5 speed / latency 88 tok/s / 2422ms input / output No data | Claude Sonnet 4 speed / latency N/A / N/A input / output No data |
Claude Haiku 4.5 claude-haiku-4-5-20251001 speed / latency No data input / output $0/request | Claude Sonnet 4 claude-sonnet-4-20250514 speed / latency No data input / output $0/request |
Weighted outcome: Claude Sonnet 4. 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 |
|---|
Claude Sonnet 4
Claude Sonnet 4 leads by 7.3
No data
No data
Claude Sonnet 4
