AIHubMixAIHubMix
← Models

GLM 5.1 vs Grok 4.5

Compare GLM 5.1 from Z.AI 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.

Z.AIGLM 5.1GrokGrok 4.5
+ Add model · 2/4
Z.AI logo
GLM 5.1
Z.AI · text → text

GLM-5.1 is Zhipu's latest flagship model, with greatly enhanced coding capabilities and significantly improved long-range task performance. It can continuously and autonomously work for up to 8 hours on a single task, completing the full closed loop from planning and execution to iterative optimization, delivering engineering-grade results. In terms of general capability and coding ability, GLM-5.1's overall performance aligns with Claude Opus 4.6, and it demonstrates stronger sustained work capability in long-range autonomous execution, complex engineering optimization, and real-world development scenarios, making it an ideal foundation for building Autonomous Agents and long-horizon Coding Agents.

Input$0.85 /M
Output$3.38 /M
Details
Grok logo
Grok 4.5
Grok · text, image → text

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.

Input$2.00 /M
Output$6.00 /M
Details

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

GLM 5.1
Grok 4.5
Input /M
$0.85
$2.00
Output /M
$3.38
$6.00
Cache read /M
$0.18
$0.50
Context length
200,000
500,000
Max output
128,000
500,000
Time to First Token
1.5 s
1.5 s
Throughput
30.1 tok/s
25.8 tok/s
Modalities
text
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputs
thinkingtoolsfunction callingstructured outputslong context
API Formats
chat_completions · claude_api
Released
-
July 2026

Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

glm-5.1grok-4.5

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

glm-5.1grok-4.5

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
glm-5.1grok-4.5
1420146015001540
Overall
14681470
Coding
15151523
Math
14781478
Hard prompts
14911495
Instruction following
14621466
Multi-turn
14771479
Creative writing
14491449
Longer query
14831485
Chinese
15111520
English
14751482
WebDev Arena
glm-5.1grok-4.5
1480152015601600
Overall
15091556
React
15051559
HTML
15201577
Gaming
15431586
Simulations
15471598
Data analytics
14971522

Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.

Cost calculator

Estimate your monthly bill for the same workload on each model.

GLM 5.1
$101 /mo
Grok 4.5
$210 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: GLM 5.1, Grok 4.5?

GLM 5.1: $3.38/M output tokens; Grok 4.5: $6.00/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Grok 4.5: 1523; GLM 5.1: 1515 (LMArena coding leaderboard).

Which responds faster?

GLM 5.1: 1.5s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

How large is each context window?

GLM 5.1 accepts 200,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 128,000 tokens on GLM 5.1 and 500,000 tokens on Grok 4.5.

Which one generates tokens faster?

GLM 5.1 at 30.1 tok/s and Grok 4.5 at 25.8 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

GLM 5.1 accepts text input and supports thinking, tool calling, function calling and structured outputs; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.

Can I call GLM 5.1 and Grok 4.5 with the same API key?

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.

Popular comparisons

Related model match-ups readers also look at.

Kimi K3vsQwen3.8 Max PreviewClaude Opus 5vsGPT 5.6 LunaClaude Opus 5vsClaude Sonnet 5Gemini 3.1 Pro PreviewvsGPT 5.5GLM 5.2vsKimi K3Gemini 3.6 FlashvsQwen3.8 MaxDeepSeek V4 FlashvsGLM 5.2Claude Opus 5vsGrok 4.5
AIHubMix

© 2023 - 2026 AIHubMix, LLC

Product

Company

Developer

Connect