LLM Comparison
Sonar Reasoning Pro vs GPT-5.4
Side-by-side specs, pricing & capabilities · Updated April 2026
Add to comparison
2/6 modelsSame tier:
S Sonar Reasoning Pro |  GPT-5.4 | |
|---|---|---|
| Organization | Perplexity AI |  OpenAI |
| OpenTools Score | ||
| Family | Sonar | GPT |
| Status | Current | Current |
| Release Date | Mar 2025 | Mar 2026 |
| Context Window | 128K tokens | 1.1M tokens |
| Input Price | $2.00/M tokens | $2.50/M tokens |
| Output Price | $8.00/M tokens | $15.00/M tokens |
| Pricing Notes | — | Cache read: $0.2500/M tokens |
| Capabilities | textvisioncodeextended-thinking | textvisioncode |
| Max Output | — | 128K tokens |
| API Identifier | perplexity/sonar-reasoning-pro | openai/gpt-5.4 |
| Benchmarks | ||
| MMLU | 83 | — |
| View Sonar Reasoning Pro | View GPT-5.4 | |
Cost Calculator
Enter your expected monthly token usage to compare costs.
| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Sonar Reasoning ProCheapest | $2.00 | $4.00 | $6.00 | — |
| GPT-5.4 | $2.50 | $7.50 | $10.00 | +67% |
Perplexity AI
Sonar Reasoning Pro
Sonar Reasoning Pro is a multimodal llm from Perplexity AI. Supports up to 128,000 token context window. Achieves 83.0% on MMLU. Available from $2.00/M input tokens.
OpenAI
GPT-5.4
GPT-5.4 is a multimodal llm from OpenAI. Supports up to 1,050,000 token context window. Available from $2.50/M input tokens.
More Comparisons
Looking for more AI models?
Browse All LLMs