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gpt-5.6-sol vs grok-4.5

Pricing, Performance & Features Comparison

Authoropenai
Context Length1M
Reasoning
Providers1
ReleasedJul 2026
Knowledge CutoffFeb 2026
License

Flagship tier of the GPT-5.6 family (Sol), OpenAI’s frontier reasoning model for the most demanding tasks.

Input$5
Output$30
Latency (p50)4.9s
Output Limit128K
Function Calling
JSON Mode
-
InputText, Image
OutputText
in$5out$30cache$0.5
Latency (24h)
Success Rate (24h)
Authorxai
Context Length500K
Reasoning
Providers1
ReleasedJul 2026
Knowledge CutoffFeb 2026
License

xAI’s flagship reasoning model with configurable reasoning effort.

Input$2
Output$6
Latency (p50)5.2s
Output Limit
Function Calling
JSON Mode
-
InputText, Image
OutputText
in$2out$6cache$0.5
Latency (24h)
Success Rate (24h)