LLM Comparison

GPT-5.4 Mini vs Sonar Reasoning Pro

Side-by-side specs, pricing & capabilities · Updated April 2026

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2/6 models
Same tier:
 OpenAIGPT-5.4 Mini
S
Sonar Reasoning Pro
OrganizationOpenAIOpenAIPerplexity AI
OpenTools Score
FamilyGPTSonar
StatusCurrentCurrent
Release DateMar 2026Mar 2025
Context Window400K tokens128K tokens
Input Price$0.75/M tokens$2.00/M tokens
Output Price$4.50/M tokens$8.00/M tokens
Pricing NotesCache read: $0.0750/M tokens—
Capabilities
textvisioncode
textvisioncodeextended-thinking
Max Output128K tokens—
API Identifieropenai/gpt-5.4-miniperplexity/sonar-reasoning-pro
Benchmarks
MMLU—83
 View GPT-5.4 MiniView Sonar Reasoning Pro

Cost Calculator

Enter your expected monthly token usage to compare costs.

ModelInputOutputTotal / movs Best
GPT-5.4 MiniCheapest$0.75$2.25$3.00—
Sonar Reasoning Pro$2.00$4.00$6.00+100%

OpenAI

GPT-5.4 Mini

GPT-5.4 Mini is a multimodal llm from OpenAI. Supports up to 400,000 token context window. Available from $0.75/M input tokens.

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.

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