LV
LLMversus

GPT-4.5 vs Sonar Reasoning: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare GPT-4.5 and Sonar Reasoning across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureGPT-4.5Sonar Reasoning
ProviderOpenAIPerplexity
Input Price / 1M tokens$75.00$1.00
Output Price / 1M tokens$150.00$5.00
Context Window
128K
127K
Max Output Tokens
8,192
8,192
Arena ELO
1,290
1,240
Coding ELO
1,295
1,235
TTFT (ms)
150
150
Tokens/sec
100
100
MultimodalYesNo
JSON ModeYesYes
Function CallingYesYes
VisionYesNo
When to Use GPT-4.5

GPT-4.5 excels at multimodal, vision, general-purpose tasks.

Strengths:

  • Latest OpenAI model
  • Strong multimodal
  • Fast inference

Best for:

multimodalvisiongeneral-purpose
When to Use Sonar Reasoning

Sonar Reasoning excels at reasoning, web-search tasks.

Strengths:

  • Reasoning + search
  • Fresh data
  • Good accuracy

Best for:

reasoningweb-search

Related Comparisons

Claude Opus 4 vs GPT-4.5Claude Opus 4 vs Sonar ReasoningGemini 2 5 Pro vs GPT-4.5Gemini 2 5 Pro vs Sonar ReasoningGPT-4.5 vs O3O3 vs Sonar ReasoningDeepseek R1 vs GPT-4.5Deepseek R1 vs Sonar ReasoningGPT-4.5 vs O1O1 vs Sonar ReasoningGPT-4.5 vs Qwen 3 235bQwen 3 235b vs Sonar ReasoningGemini Exp 1206 vs GPT-4.5Gemini Exp 1206 vs Sonar ReasoningGPT-4.5 vs Groq Deepseek R1GPT-4.5 vs Llama 4 MaverickGPT-4.5 vs Together Deepseek R1GPT-4.5 vs Grok 3Claude Sonnet 4 vs GPT-4.5Deepseek V3 vs GPT-4.5