gpt-5.4-2026-03-05 vs grok-4.20-0309-reasoning
Pricing, Performance & Features Comparison
GPT-5.4 is OpenAI's most capable and efficient frontier model for professional work, combining advanced reasoning, coding, and native computer-use capabilities into a single model. It supports up to 1 million tokens of context, enabling agents to plan, execute, and verify tasks across long horizons. It is also the most factual model OpenAI has released, with individual claims 33% less likely to be false compared to GPT-5.2.
Input$2.5
Output$15
Latency (p50)4.4s
Output Limit128K
Function Calling
JSON Mode
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InputText, Image
OutputText, Image
in$2.5out$15cache$0.25–
Latency (24h)
Success Rate (24h)
Reasoning variant of grok-4.20, positioned by xAI on low hallucination rate and instruction following.
Input$1.3
Output$2.5
Latency (p50)4.8s
Output Limit–
Function Calling
JSON Mode
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InputText, Image
OutputText
in$1.3out$2.5cache$0.2–