LLM Comparison

GPT-5.4 vs Grok 4.1 Fast

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

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2/6 models
Same tier:
 OpenAIGPT-5.4xAIGrok 4.1 Fast
OrganizationOpenAIOpenAIxAIxAI
OpenTools Score
FamilyGPTGrok
StatusCurrentCurrent
Release DateMar 2026Nov 2025
Context Window1.1M tokens2.0M tokens
Input Price$2.50/M tokens$0.20/M tokens
Output Price$15.00/M tokens$0.50/M tokens
Pricing NotesCache read: $0.2500/M tokensCache read: $0.0500/M tokens
Capabilities
textvisioncode
textvisioncode
Max Output128K tokens30K tokens
API Identifieropenai/gpt-5.4x-ai/grok-4.1-fast
 View GPT-5.4View Grok 4.1 Fast

Cost Calculator

Enter your expected monthly token usage to compare costs.

ModelInputOutputTotal / movs Best
Grok 4.1 FastCheapest$0.20$0.25$0.45—
GPT-5.4$2.50$7.50$10.00+2122%

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.

xAI

Grok 4.1 Fast

Grok 4.1 Fast is a multimodal llm from xAI. Supports up to 2,000,000 token context window. Available from $0.20/M input tokens.

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