Compare AI Models

Versions side by side — rows that differ across these models are highlighted.

3 models	Gr xAI Grok 4.3 View →	Cl Anthropic Claude Opus 4.8 View →	Op OpenAI GPT-5.5 View →
Maker	xAI	Anthropic	OpenAI
Tier	Flagship	Flagship	Flagship
Status	Default	Active	Default
Context window	1M ctx	1M ctx	1M ctx
Knowledge cutoff	—	—	Jan 1, 2026
Released	Apr 30, 2026	May 28, 2026	Apr 23, 2026
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Note	Current flagship; cost-efficient ($1.25/$2.50 per 1M), 1M context, strong agentic tool-calling and native real-time X/web access.	Designated current flagship; reliability-focused Opus (4x less likely than 4.7 to let its own code flaws pass). 1M context, $5/$25, effort levels through xhigh/max, Fast mode at $10/$50. Guide positions Fable 5 one tier above it.	Current flagship general-purpose model; strong coding, reasoning, writing, and agentic tasks. Tiered pricing above a context threshold.