Output tokens cost $2.76 per million on glm-5.2 and $0.33 per million on step-3.5-flash. Input tokens cost $0.79 per million on glm-5.2 and $0.11 per million on step-3.5-flash. Cached input tokens are billed at $0.20 per million on glm-5.2 and $0.11 per million on step-3.5-flash. Discounted rates are shown where a promotion is active. Context lengths are 1,000,000 tokens on glm-5.2 and 256,000 tokens on step-3.5-flash. On the LMArena coding leaderboard glm-5.2 scores 1507 and step-3.5-flash scores 1451.
glm-5.2
step-3.5-flashGLM-5.2 is Z.ai’s flagship model for the era of long-horizon tasks. With a truly usable 1M-token context window, it can handle project-level engineering context, execute long-running tasks more reliably, follow engineering standards more consistently, and complete the full development workflow from requirements to multi-platform deployment in a single task.
step-3.5-flash is stepfun's flagship inference model, designed for high-complexity tasks that require deep reasoning and fast execution. It excels at decomposing multi-step problems, performing tool calls, and maintaining consistency across massive datasets. It is the preferred choice for complex workloads such as long-context agents, advanced software engineering, and end-to-end research automation.
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.
step-3.5-flash: $0.33/M output tokens; glm-5.2: $2.76/M. Use the cost calculator above to estimate your own workload.
glm-5.2: 1507; step-3.5-flash: 1451 (LMArena coding leaderboard).
glm-5.2 accepts 1,000,000 and step-3.5-flash accepts 256,000 input tokens.
glm-5.2 accepts text input and supports thinking, tool calling, function calling and structured outputs; step-3.5-flash accepts text and image input.
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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