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gpt-5.4-mini-2026-03-17 vs grok-4.20-0309-reasoning

Pricing, Performance & Features Comparison

Authoropenai
Context Length400K
Reasoning
Providers1
ReleasedMar 2026
Knowledge CutoffAug 2025
License
Input$0.75
Output$4.5
Latency (p50)8.7s
Output Limit128K
Function Calling
JSON Mode
-
InputText, Image
OutputText
in$0.75out$4.5cache$0.075
Latency (24h)
Success Rate (24h)
Authorxai
Context Length1M
Reasoning
Providers1
ReleasedMar 2026
Knowledge Cutoff
License

Reasoning variant of grok-4.20, positioned by xAI on low hallucination rate and instruction following.

Input$1.3
Output$2.5
Latency (p50)8.1s
Output Limit
Function Calling
JSON Mode
-
InputText, Image
OutputText
in$1.3out$2.5cache$0.2
Latency (24h)
Success Rate (24h)