Compare Grok 4.20 Multi Agent 0309 from Grok and Grok 4.5 from Grok on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
Grok 4.20 Multi Agent 0309Grok 4.5Grok 4.20 is our newest flagship model with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering consistently precise and truthful responses.
Grok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math. With both intelligent and efficient reasoning, Grok 4.5 excels at real engineering tasks and exceeds comparable leading models at these tasks.
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Daily traffic served through AIHubMix — how demand for each model is trending.
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
Grok 4.20 Multi Agent 0309: $6.00/M output tokens; Grok 4.5: $6.00/M. Use the cost calculator above to estimate your own workload.
Grok 4.5: 1523; Grok 4.20 Multi Agent 0309: 1516 (LMArena coding leaderboard).
Grok 4.5: 1.9s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Grok 4.20 Multi Agent 0309 accepts 2,000,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 2,000,000 tokens on Grok 4.20 Multi Agent 0309 and 500,000 tokens on Grok 4.5.
Grok 4.20 Multi Agent 0309 at 42.9 tok/s and Grok 4.5 at 30.7 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Grok 4.20 Multi Agent 0309 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.
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