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GPT-5.6 Sol vs Grok 4.5

Both models are evenly matched

Arena ELO

Tie

Cheaper

Tie

Faster

Tie

Detailed Comparison

CategoryGPT-5.6 SolGrok 4.5
ProviderOpenAI xAI
Context Window128K 128K
Input Price ($/1M)N/A N/A
Output Price ($/1M)N/A N/A
Arena ELON/A N/A
CodingN/A N/A
ReasoningN/A N/A
Speed (tokens/sec)N/A N/A
Open SourceNo No

Frequently Asked Questions

Which has a larger context window?

GPT-5.6 Sol supports 128K context, while Grok 4.5 supports 128K.

Is GPT-5.6 Sol or Grok 4.5 open source?

GPT-5.6 Sol is proprietary. Grok 4.5 is proprietary.

Related Articles

Grok 4.5 enters private beta at Tesla and SpaceX

OpenAI narrows GPT-5.6 rollout after U.S. request

Grok Imagine 1.5 turns prompts into 720p video

Grok AI’s price surge is a liquidity warning, not a thesis

Grok Build Adds /goal for Autonomous Coding

GPT-5.6 rumors point to 2M context and coding gains

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