GPT-5.5 vs Grok 3

Pick two tools from the same category to compare side-by-side.

	GPT-5.5 OpenAI's flagship frontier model, positioned as a new class of intelligence for coding and professional work.	Grok 3 xAI's frontier model with real-time X data access.
Category	model	model
Vendor type	commercial	commercial
Pricing	usage	free
Strengths	+ OpenAI's recommended model for complex reasoning and coding + 1M-token context window with up to 128K output tokens + Generally available via the OpenAI API with listed pricing of $5 input / $30 output per million tokens	+ Real-time X data access + Frontier-tier reasoning
Tradeoffs	− Most expensive tier in OpenAI's lineup; GPT-5.4 is positioned as the more affordable option for similar work − API-only commercial model; no open weights	− xAI-specific platform − Smaller agent-tooling ecosystem
Used in stacks	0	0