Data points: 61
The readout for Claude Haiku 4.5 and Sonar Reasoning Pro, before the detailed comparison sheet.
Decision read
Claude Haiku 4.5
Claude Haiku 4.5 currently has the stronger profile, with verified wins split 4 to 0.
Evidence depth
61 data points
Includes 0 benchmark rows, 0 audit samples, and 5 provider examples.
Selection signal
Start with Claude Haiku 4.5
The charts below split 5 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.
Model compare Claude Haiku 4.5 vs Sonar Reasoning Proclaude-haiku-4-5-vs-sonar-reasoning-pro | Model A Claude Haiku 4.5 | Model B Sonar Reasoning Pro |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 0 wins |
| Where it leads | Cheapest input price, Free providers, Provider coverage, Recent tests |
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
47.8
Avg. score
Sonar Reasoning Pro
57.4
Selected category
Coding
Claude Haiku 4.5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
No shared professional benchmark scores are available yet.
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Haiku 4.5 | Sonar Reasoning Pro |
|---|---|---|
| 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 | Sonar Reasoning Pro |
|---|---|---|
0 tests | Claude Haiku 4.5 claude-haiku-4-5-20251001 speed / latency N/A / N/A input / output $0.350/M |
This report only uses LMSpeed data for Claude Haiku 4.5 and Sonar Reasoning Pro: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Claude Haiku 4.5 | Sonar Reasoning Pro |
|---|---|---|
| When to choose each model | Claude Haiku 4.5 Claude Haiku 4.5 is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. | Sonar Reasoning Pro Sonar Reasoning Pro does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. |
TL;DR: Claude Haiku 4.5 leads across 61 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Claude Haiku 4.5 vs Sonar Reasoning Pro into nearby model comparisons with enough verified LMSpeed data.
| No data |
| Model metadata | Claude Haiku 4.5 exposes 200K tokens; notable signals: Text input, Image input, File input, Text output. | Sonar Reasoning Pro exposes 128K tokens; notable signals: Text input, Image input, Text output, Web search. |
|---|---|---|
| Developer | Anthropic | Perplexity |
| Context window | 200K tokens | 128K tokens |
| Max output | 64K tokens | No data |
| Released | Oct 2025 | Mar 2025 |
| Modalities | Input TextImageFile Output Text | Input TextImage Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputText outputWeb searchReasoning |
| Parameters | No data | No data |
| Tokenizer | Claude | Other |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | anthropic/claude-haiku-4.5 | perplexity/sonar-reasoning-pro |
| References | No data | No data |
Sonar Reasoning Pro sonar-reasoning-pro speed / latency N/A / N/A input / output $2.50/M/$10.00/M |
AI API0 tests | Claude Haiku 4.5 speed / latency N/A / N/A input / output No data | Sonar Reasoning Pro speed / latency N/A / N/A input / output No data |
|---|
Dext API0 tests | Claude Haiku 4.5 anthropic/claude-haiku-4.5 speed / latency N/A / N/A input / output $0.082/M/$0.411/M | Sonar Reasoning Pro perplexity/sonar-reasoning-pro speed / latency N/A / N/A input / output $0.164/M/$0.658/M |
|---|
DuckDuck API0 tests | Claude Haiku 4.5 speed / latency N/A / N/A input / output No data | Sonar Reasoning Pro speed / latency N/A / N/A input / output No data |
|---|
OpenRouter0 tests | Claude Haiku 4.5 speed / latency N/A / N/A input / output No data | Sonar Reasoning Pro speed / latency N/A / N/A input / output No data |
|---|
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
