Output tokens cost $6.00 per million on Grok 4.5 and $0.50 per million on Grok Code Fast 1. Input tokens cost $2.00 per million on Grok 4.5 and $0.20 per million on Grok Code Fast 1. Cached input tokens are billed at $0.50 per million on Grok 4.5 and $0.05 per million on Grok Code Fast 1. Context lengths are 500,000 tokens on Grok 4.5 and 256,000 tokens on Grok Code Fast 1. Time to first token (TTFT) measured on AIHubMix is 2.1s on Grok 4.5 and 1.3s on Grok Code Fast 1. Measured output throughput is 26.7 tok/s on Grok 4.5 and 87.0 tok/s on Grok Code Fast 1.
Grok 4.5Grok Code Fast 1Grok 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.
Grok 4.1 is a new conversational model with significant improvements in real-world usability, delivering exceptional performance in creative, emotional, and collaborative interactions. It is more perceptive to nuanced user intent, more engaging to converse with, and more coherent in personality, while fully preserving its core intelligence and reliability. Built on large-scale reinforcement learning infrastructure, the model is optimized for style, personality, helpfulness, and alignment, and leverages frontier agentic reasoning models as reward evaluators to autonomously assess and iterate on responses at scale, significantly enhancing overall interaction quality.
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 Code Fast 1: $0.50/M output tokens; Grok 4.5: $6.00/M. Use the cost calculator above to estimate your own workload.
Grok Code Fast 1: 1.3s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Grok 4.5 accepts 500,000 and Grok Code Fast 1 accepts 256,000 input tokens. Maximum output per request is 500,000 tokens on Grok 4.5 and 10,000 tokens on Grok Code Fast 1.
Grok Code Fast 1 at 87.0 tok/s and Grok 4.5 at 26.7 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context; Grok Code Fast 1 accepts text and image input and supports thinking, tool calling, function calling and structured outputs.
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
Related model match-ups readers also look at.
AIHubMix