xAI Releases Grok 4.3 with 1M Context, 40-60% Price Cuts, and Agentic Benchmark Gains
xAI
xAI released Grok 4.3 on May 6 with a 1M-token context window, improved agentic tool calling, and pricing cuts of 37.5% on input and 58.3% on output versus Grok 4.20. The model scores 1,500 ELO on the GDPval-AA agentic benchmark (+321 points from predecessor) and 98% on tau2-Bench Telecom. Priced at $1.25/M input and $2.50/M output.
Why it matters
A 321-point ELO leap on agentic benchmarks combined with sub-$2 output pricing makes Grok 4.3 a direct competitor to GPT-5.5 and Gemini for enterprise agentic workflows at meaningfully lower cost.
Importance: 4/5
Major model update with 321-point ELO agentic benchmark gain, 1M context, and 40-60% price cuts positioning xAI competitively against frontier alternatives
Sources
official
xAI News — Grok 4.3 Release