Context lengths are 500,000 tokens on Grok 4.5 and 256,000 tokens on MiMo V2 Flash (free). Time to first token (TTFT) measured on AIHubMix is 1.7s on Grok 4.5 and 1.6s on MiMo V2 Flash (free). Measured output throughput is 26.6 tok/s on Grok 4.5 and 130.4 tok/s on MiMo V2 Flash (free). On the LMArena coding leaderboard Grok 4.5 scores 1523 and MiMo V2 Flash (free) scores 1445.
Grok 4.5
MiMo V2 Flash (free)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.
MiMo-V2-Flash is an open-source foundation language model developed by Xiaomi. It adopts a MoE architecture with 309B total parameters and 15B active parameters per inference, balancing performance and efficiency. The model features a hybrid attention architecture, supports a hybrid-thinking toggle, and offers a 256K context window, enabling strong capabilities in complex reasoning, code generation, and agent-based scenarios. On SWE-bench Verified and SWE-bench Multilingual, MiMo-V2-Flash ranks #1 among open-source models globally, delivering performance comparable to Claude Sonnet 4.5 while costing only about 3.5% as much.
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 4.5: 1523; MiMo V2 Flash (free): 1445 (LMArena coding leaderboard).
MiMo V2 Flash (free): 1.6s 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 MiMo V2 Flash (free) accepts 256,000 input tokens. Maximum output per request is 500,000 tokens on Grok 4.5 and 256,000 tokens on MiMo V2 Flash (free).
MiMo V2 Flash (free) at 130.4 tok/s and Grok 4.5 at 26.6 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; MiMo V2 Flash (free) accepts text input and supports web search.
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.
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